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387 Comment 412 Toshiba service briefs Editor The ITV Digital saga. Latest advice from Toshiba Technical. Martin Eccles

388 Teletopics 413 TV/VCR spares guide 2002 Consultant Editor Bright prospects for CE retailing. Free-to-view An essential reference listing for TV/VCR spares. John A. Reddihough STBs. The NDS/Canal+ spat. News from TiVo. Our 2002 update includes e-mail addresses. New video products. Advertisement Sales 420 DX and satellite reception 0208 722 6028 390 Technology developments Terrestrial DX and satellite TV reception reports. Fax 0208 770 2016 from Sony News on TV broadcasting and satellite band Sony has released details of a number of develop- changes. The current sunspot cycle. An easy-to- ments in several areas, including DVD-Video, build VHF preamplifier circuit. Roger Bunney Editorial Office DVD recording, digital imaging, Super Audio CD, reports. 01782 870684 Fax 01782 878233 423 Service casebook Michael Maurice picks out some interesting items Note that we are unable to from his notebook. answer technical queries over the telephone and cannot 424 Monitors provide information on spares Guidance on repairing monitors and related equip- other than that given in our ment. Spares Guide. 426 VCR Clinic

the MiniDisc, recording media and TV displays. 428 Jack's workshop George Cole reports on innovations and products Some Panasonic digibox faults. Use of remote-con- we can expect to see later this year. trol extenders with cable TV systems.

394 Avoiding virus attacks 429 Test case 473 PC viruses have become a plague, and cause wast- ed time and effort. The solution is to play safe and install protection, which is available in various 430 TV fault finding forms. Nick Beer surveys the current situation and makes recommendations. 433 Next month in Television

403 The Panasonic Motion DV Studio 434 Web service Brian Storm describes the use and features of this Useful websites for TV professionals, technicians and enthusiasts.

436 Satellite notebook Checking the ZIF tuner module in Pace digiboxes. Digital channel update.

437 Audio faults Hints and tips on repairing professional and con- sumer equipment.

438 Letters digital video editing system, which works with A scam. The pay-TV problem. Phone technology. IBM-compatible PCs. A home-recorded disc problem with audio equip- ment. Channel balancing. 404 Servicing the Mitsubishi TFS6705K monitor 440 Help wanted In Part 2 of his series Donald M. Henry describes the operation of the frame and line timebases and 447 What a life! their response to multisync signals from the PC, A mixed bag of faulty VCRs and TV sets. The cur- and lists some workshop experiences. rent state of TV broadcasting — rubbish TV. Donald Bullock's servicing commentary. 410 Hitachi VTF645 fault-finding guide John Coombes on how to tackle the various faults you could get with this popular VCR. Next issue, dated June, on sale May 15th.

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386 May 2002 TELEVISION The ITV Digital saga hen writing about the woes of the reason for viewers to go for the ITV Digital W pay-TV companies last month it was option. And it seems that those who did not possible to foresee quite how soon the were none too satisfied: the churn rate for crunch would come. For ITV Digital the ITV Digital has been running at about 25 crucial step was taken on March 27th, per cent, which compares with 10-4 per when an application by its owners Granada cent for BSkyB and 17-7 and 18.7 per cent Important news and Carlton Communications to put it into respectively for the cable operators NTL administration was agreed in the High and Telewest. for ITV Digital customers Court. The joint administrators, Nick ITV Digital's life to date has been short Dargan and Nick Edwards of Deloitte & Touche, were granted a court order to run ITV Digital's life has been short and difficult ... it was effectively sunk the company for the next six months, with the stipulation that they will be expected to by an over-generous arrangement with the Football League report back to Mr Justice Etherton two weeks from March 27th on the progress they have been able to make. While ITV and difficult. It was launched in November but this seems to be part of an agreed debt Digital is being run by the administrators, 1998 as ONdigital, and was immediately rescheduling that's being negotiated — the Granada and Carlton Communications will presented with a problem — a lack of set- company has the cash, and there's a thirty- continue to provide funds to enable it to top boxes. The following year BSkyB day period before it is technically in continue broadcasting. decided to provide set-top boxes free, and default. Negotiations on restructuring the The problem faced by Granada and ONdigital had to do the same. This hardly company's massive $17bn (£12bn) debt Carlton Communications was that they helped! There were subsequently continue. In the midst of all this the didn't have the funds to be able to keep the management changes, which are always company announced a $15.8bn (£11bn) loss-making pay-1'V broadcaster in unsettling. Then, last year, it was pre-tax loss last year. Its future is clouded operation until brealceven is achieved, relaunched as ITV Digital. It might have to say the least. expected to be some time in 2004, and in been managed better, but was effectively Over in Germany the Kirch Grappe, the meantime meet the various contractual sunk by that over-generous arrangement which has a majority stake in the country's obligations entered into by ITV Digital to with the Football League. The final straw largest TV broadcaster and owns 70 per provide programming, transmission, was probably the collapse in TV cent of the pay-TV operation Premiere, has services, set-top boxes and so on. The advertising late last year: it severely come close to collapse. Talks between the biggest obligation, which tipped the limited Granada's and Carlton company's shareholders and banks on a balance, was to pay £178m to the Football Communications' ability to continue rescue package, because it cannot service League over the next two years to continue funding ITV Digital. its debt and commitments, have made little broadcasting its matches. The League has On the cable TV front, NTL has come progress. Whatever the outcome, its been paid up to August, when £89 is due. close to bankruptcy and may well apply founder Leo Kirch is set to lose control. A reduced offer of £50m, which was for Chapter 11 (the US equivalent of He made the same basic mistake as ITV rejected by the League, was made by ITV administration) protection. It has failed to Digital, in over paying for programme Digital to continue broadcasting football make an interest payment of $96m (£67m), material. over the next two years. The problem for the administrators is to renegotiate the ITV Digital contracts with a COPYRIGHT SUBSCRIPTION ENQUIRIES view to making the company a viable O Highbury Business Communications. All rights Telephone: 01444 445 566 business. If this proves to be impossible, reserved. No part of this publication may be Fax: 01444 445 447 reproduced, stored or transmitted in any form or Credit card orders: 01622 778 000 ITV Digital is likely to be put into by any means without the written permission of liquidation. Most observers feel that the the publishers. Address: Television, Subscriptions Dept, prospects for its survival, with its contracts All reasonable precautions are taken by Television PO Box 302, renegotiated, are reasonably good. In the to ensure that the advice and data published are Haywards Heath, West Sussex RH16 3YY, UK. reliable. We cannot however guarantee it and we Make cheques payable to: Television event of liquidation, broadcasting would cannot accept legal responsibility for it. cease and the franchise would be put up for Subscription rates: offers. This procedure might be avoided if CORRESPONDENCE UK £32.00 per year All correspondence regarding advertisements Airmail Eire £36.00 per year an offer from an acceptable broadcaster should be addressed to the Advertisement was made to the liquidators for what was Manager, Television, Highbury Business Airmail Europe £46.00 per year left of ITV Digital. Whatever happens, Communications, Anne Boleyn House, 9-13 Ewell Airmail Rest of World £59.00 per year digital terrestrial TV viewers would still be Road, Cheam, Surrey, SM3 8BZ. Editorial correspondence should be addressed to NE WSTRADE ENQUIRIES provided with a considerable range of free- Television, Editorial Department, Highbury to-air channels. Business Communications, Anne Boleyn House, 9- Distributed by COMAG It's a sad state of affairs, but ITV Digital 13 Ewell Road, Cheam, Surrey, SM3 8BZ. Telephone: 01895 444055 has always been in an awkward position. It INDEXES AND BINDERS ISSN 0032-647X has, with government encouragement, been Indexes for Vols. 38 to 50 are available at £3.50 trying to persuade viewers to convert from each from SoftCopy Ltd., who can also supply an analogue to digital reception. But the main thirteen-year consolidated index on computer disc. For further details see page 433. advantage of digital transmission is the Binders that hold twelve issues of Television are number of extra channels that can be available for £6.50 each from Television Binders, HIGHBURY provided, and in this respect viewers are Pringle, Street Blackburn, BB1 1SA. better off with BSkyB or the cable Make cheques payable to "Television Binders". Business Communications companies. With its limited number of BACK NUMBERS additional channels, there has been little If available issues are £.50 each.

TELEVISION May 2002 TELETOPICS Bright prospects for CE retailing The latest report from retail research group Richard Hyman put it, "electricals technol- ational efficiency". Price is the overriding Verdict Research, entitled Verdict on ogy has become the new rock'n'roll as con- factor. Products move rapidly from the Electrical Retailers 2002, says the prospect sumers enhance their lifestyles with must- early purchasers stage to the mass-market for consumer electronics retailing over the have gadgetry". The report points out that stage, which means that the period during next five years is good but not without dan- product areas such as TV, DVD and IT are which premium prices can be maintained is ger. "The sector is the retail tiger" it com- driven by innovation, "which seems to cap- squeezed. This puts further pressure on ments, "both exhilarating and fast-moving, ture consumers' imagination as a matter of margins, which "will always be low where but simultaneously dangerous and unfor- course". there is a high level of relatively non-exclu- giving." But this growth rate has attracted the sive merchandise". During the past five years the growth of attention of those in other retail sectors. The market leaders' dominance has been consumer spending on electricals has aver- Particularly with lower-priced items, super- enhanced by the development of larger aged 5.7 per cent annually, to a total of market chains and on-line merchants have superstores by Currys (part of the Dixons £19-6 billion in 2001, well ahead of the shown increasing interest. Because of the Group) and Comet. Stores with an area of overall growth in consumer spending at 4.6 trading pressure, the report considers that about 25,000 square feet are three times the per cent. The sector is set to outstrip DIY, casualties amongst electrical retailers are size of the first superstore sheds. Verdict another buoyant market, and the report pre- likely to remain higher than average in the concludes that the electrical superstore has dicts that the rate of growth in CE spending retail industry. come of age. Despite the number of failures will be maintained over the next five years. The report says the four main features of in recent years, for example Tempo, Tiny, Sales of electricals are expected to rise by the electricals sector are shortened product Gateway, ScottishPower and The WAP 36.2 per cent in the years to 2006, against a life cycles, the increasing grip of the mar- Store, the total sector selling space appears growth of 19.2 per cent in total retail ket leaders Dixons and Comet, growing to have increased. spending. Purchases of flat-screen TVs, price competition and increased pressure on Verdict's advice to smaller retailers is to DVD players and computer games will profit margins. To achieve success, it's nec- develop product authority and service drive the market. As Verdict's chairman essary to "drive volumes and improve oper- advantages that provide added value.

Roadstar has introduced a Free-to-view STBs range of mini TV sets with The Pace digital TV adapter is not, at pre- high-resolution, widescreen sent, capable of being upgraded for the TFT colour LCD screens in reception of pay-TV channels because the sizes 4, 5-6 and 7in. Top of company was unable to reach a business the range is the 7in. Model agreement with ITV Digital. It seems that LCD7169 (see photo), which the upgrade feature would have involved is expected to sell at about £300. Power can be from a some shared costs, for example a call cen- battery pack, AC adaptor or tre and a distribution channel for the smart DC car lighter adaptor. An cards required to enable pay-TV reception. AV socket provides connec- Some last-minute technical changes were tion to a camcorder, VCR, made to the adapter before it went on sale. DVD player or video games Other adapters have been announced. console. The range also Nokia is to launch one based on its includes a portable DVD Mediamaster 9850T ITV Digital STB at a player and, to be released later this year, a combined price expected to be about £150. An entirely DVD/CD player, FM/AM new model, the Mediamaster 221T, is likely stereo radio and 5in. LCD to follow in July or August. Both boxes are monitor. planned to be upgradable for pay-TV use and will incorporate the MHEG system to provide access to interactive services. Netgem has launched a free-to-view digital terrestrial TV STB, the TVMate, in The NDS/Canal+ spat Australia and plans to launch a UK version In an application to a Californian district less". It maintains there is "clear evidence in the autumn. The Australian box is based court Canal+ has claimed that NDS, a that the pirate community targeted on open DVB/HTML standards. It incorpo- technology company owned by Rupert Canal+ early in 1998 and succeeded with- rates a modem and provides interactivity Murdoch's News Corporation, undertook out help from anyone, particularly NDS". using either the broadcast or the return path. considerable work on extracting the code NDS plans to file a counterclaim. It could On the cable front, Pace has announced from its TV smart cards and published be a long time before we know the out- that it will not supply further STBs to NTL the code on a website frequented by come — litigation in the US tends to be a because of difficulty in obtaining credit counterfeiters. The Canal+ smart-card lengthy process. insurance. NTL had been taking 30 per technology is used by ITV Digital Pirate cards have been a problem for cent of Pace's output of STBs. The cable amongst others, and Canal+ is seeking ITV Digital which, it has been estimated, company has announced an agreement damages in excess of $1bn. NDS says could have lost upwards of £100m from with Samsung to become a second supplier that the claim is "outrageous and base- their use. of STBs.

May 2002 TELEVISION New video products Samsung has demonstrated the world's record and playback, enabling a programme largest TFT-LCD TV set, which has a 40in. to be watched from the beginning while the widescreen display that consists of rest is still being recorded. Model HR- approximately 980,000 pixels (1,280 x XV I EK is a combined DVD-Video player 768), i.e. XGA resolution. The company and Nicam VHS recorder. The DVD player will be offering a range of LCD TV sets, can also read CD-R/RW discs and MP3 including 15, 17 and 24in. models. files. Model XV-NA7 is a DVD-Audio Sharp has launched a DVD recorder, player that's compatible with DVD-Video, Model DV-SR100, in Japan. It uses DVD- CD, VCD and CD-R/RW discs and can This palm-sized, battery-powered spectrum RW or DVD-R discs and offers two read MP3 files. Other features include analyser, the Bantam Model 401B, has recording modes, VR which is designed for integrated Dolby Digital, DTS and MPEG been released in the UK by HF Instruments. editing as well as repeat recording/erasing decoders. MiniDV camcorder Models GR- It covers the range 30-1,024MHz, is fully and Video which enables recordings made DVP5 and GR-DVP7 have a 1-02 program mable and can be used on the on the machine to be played by other DVD- Megapixel CCD image sensor, a web cam bench or in the field for measuring har- Video machines. There's an IEEE 1394 function and an MPEG-4 e-mail video clip monic and spurious emissions, identifying digital video in/out socket for connection to facility. Model GD-DV3000 has a 1.33 unknown or unwanted signals, signal mon- a digital camcorder and a progressive scan Megapixel CCD image sensor and an f1.2 itoring, field strength measurement and output. Price in Japan is the equivalent of lens. Other features include an MPEG-4 e- EMC testing. There's an E-field probe for trouble-shooting and EMC measurements. about £690. No details of a UK launch have mail clip facility, a web camera function, Price is in the £2,000 region. For further been released. In the UK, Sharp has added DV index navigation and Digital Colour details phone HF Instruments on 01420 590 the entry-level Model VL-NZ8S to its range NightScope. It can handle MP3 sound and 000, refer to the website at of MiniDV camcorders, with viewcam has a digital still camera function, 300x wwvv.hf-inst.co.uk or e-mail presentation. There's a 3in. 270° rotating digital zoom, SD Memory/MultiMedia card salesehf-inst.co.uk slot, USB interface and DV in/out and analogue input sockets. Panasonic had launched two well- specified DVD players. Model DVD- News from TiVo RV32EBS at about £180 plays DVD-Video, TiVo has upgraded the software for its UK DVD-R, Video-CD and recordable CDs, hard-disk PTR service — the upgrade is including discs with MP3 files. Features being carried out automatically for sub- include two Cinema modes to enhance scribers during the spring period. New fea- picture quality with movies, and a 4:3 zoom tures include an Overtime Scheduler, function to eliminate the black bands when which enables programmes to be recorded a 16:9 movie is played back via a 4:3 aspect up to ten minutes before the scheduled ratio TV set. The Super Hi Speed Scan start time and three hours after the stop facility enables you to skip through a disc at time. For easier searching, navigation up to 200 times the normal playback speed markers are placed at fifteen-minute inter- (an on-screen indicator keeps tabs on vals. There are plans for a Series 2 model progress), while the Dialogue Enhancer with a larger hard disk. US digital satellite facility enables you to add about 6dB to the operator DirectTV plans to use TiVo tech- Sharp's new entry-level MiniDV camcorder speech channel should the dialogue be nology in its next-generation of receivers. Model VL-NZ8S. drowned out with 5.1 multi-channel audio. TiVo signed up some 100,000 new sub- Model DVD-XVIOEBS at about £230 is an scribers during the fourth quarter of its last ultra-slim (52nun high) model with the financial year, bringing the global total to LCD screen, an 800,000-pixel CCD image above features and still picture display. 380,000 at the end of January 2002. sensor and provision for using an optional Panasonic has also launched two new Revenue for the year grew 318 per cent to high-sensitivity zoom microphone. Still Nicam VCRs, Models NV-FJ630 and NV- $19.4 million (£13.9m). The net loss made images éan be recorded using the SD FJ730, with CVC Super. CVC (Crystal during the year was $157.7m (£112.6m), Memory/ MultiMedia card slot. View Control) uses a microcontroller to significantly better than the $216.6m loss Thomson now has TV/DVD combi continuously check the video tape and heads made during the year to the end of January models with 14, 24, 28, 32 and 36in. screen for optimum picture quality: the Super 2001. sizes. Prices range from about £300 for the version uses Super Ferrite heads, which 14in. model to £2,000 for the 36in. one. were previously used only with Panasonic's A number of new products have been high-end S-VHS recorders. Other features Corrections introduced by JVC. The 42in. plasma- include a 35x jet-search system and Q-Link. Because of a production problem the display TV Model AV-42PD2OES Denon has launched a high-end DVD- incorrect heading appeared above our main incorporates a twin tuner and Natural Scan Video/Audio player, Model DVD-Al, news story last month, on page 324. The first Widescreen Plus technology. CRT Model which has a vibration-resistant chassis that item should have been headed 'Blue laser AV-32HD25EJS provides 100Hz scanning consists of a single layer of 1.2mm copper- optical disc standard announced', not with High Density PAL technology which, plated sheet and three layers 1.6mm steel. It 'Digital TV adapter from Pace' which was like Sony's Digital Reality Creation and plays DVD-Audio, DVD-Video, DVD- repeated from the previous month. Toshiba's Digital Frame Scan, uses digital R/RW, CD and CD-R/RW discs and can Harry Todd's web address is interpolation techniques to provide 1,250- read MP3 audio and JPEG video files. www.toddweb.co.uk line scanning. Model HM-VDRIOEK is a Connectors include two sets of composite not as given on page 325 last month. You DVD-RAM recorder that provides a video output sockets, two S-video output can find information there on TV-trade recording time of one-six hours, can also sockets, an RGB scart socket and optical related injuries and the legal steps open to use DVD-R discs and is compatible with and coaxial digital outputs. All this comes sufferers. DVD-Audio discs. It offers simultaneous at a price — about £2,500!

TELEVISION May 2002 389 Technology developments from Sony TV sets Sony recently released details of a number of Sony will this year launch its first plasma Wega TV sets with built-in speakers, a TV developments in several areas, including DVD-Video, tuner and an optional AV rack. Research DVD recording, digital imaging, Super Audio CD, the carried out by the company has revealed that many consumers prefer conventional MiniDisc, recording media and TV displays. George AV furniture rather than hanging their equipment on the wall. The sets have 32 or Cole reports on the innovations and products we can 42in. screens and will be launched in June. expect to see later this year They incorporate Sony's Real Digital System, which uses a new bi-pixel circuit that converts interlaced signals to ony has a reputation for innovation BT's recent decision to reduce the progressive scanning, improving the and will be launching a number of wholesale cost of broadband connections resolution. Snew formats and products later this could help to promote the rollout of Sony's 50in. widescreen projection set, year. The company believes that consumer broadband across the country. Model KF-50SX200, has a 3-15m-pixel electronics is moving into a new era, which Sony is working with companies such as display. It uses three (for R, G and B) it calls Networked AVIT. It will blur the Nokia and AOL Time Warner on the XGA LCD panels, each with 1-05m pixels, traditional line between PC and consumer development of an operating system that to create the display. An optical engine electronics products. Sony describes these will ensure interoperability between helps to maintain consistent brightness. new products as "post-PC devices", different consumer electronics products. It Sony says that the brightness approaches because they are designed to be simpler to is also building Bluetooth technology into that of a 36in CRT, so the screen can be use than a PC. more equipment, including camcorders and viewed in normal lighting conditions. Sony sees a future in which many mobile phones. The current Bluetooth Other features include Digital Reality devices, including camcorders, digital TV standard has a maximum data transfer rate Creation, Virtual Dolby Surround sound, sets and games consoles, will be connected of 1Mbits/sec and an operating range of twin tuners, three scart sockets, a front S- to the internet to upload content, such as I Om. The company also sees technologies video socket and 2.5-level teletext with a home video filins, or download content, such as IEEE 1394 (FireWire/i-LinWDV) 2,000-page memory. such as music, videos and games. For this and IEEE 802.11b (wireless Ethernet) Other new models include the KV- to happen there needs to be a large playing a major role in home networking. 28L560 and KV-32L560 with widescreen infrastructure of web-enabled products. A glance at the future is provided by CRTs and 100Hz scanning. Sony has already launched camcorders Sony's prototype Multi-Entertainment with built-in browsers, and forecasts that Terminal, which the company has been DVD recording by 2005 it will be selling 50 million demonstrating at various events. It uses the The DVD-Video system has become the networked products a year. If Sony's view Windows 2000 PC operating system and fastest-growing consumer electronics is to realised, large numbers of households includes a DVD player, an FM tuner, a format ever. Sony says that by the end of will require a high-speed, broadband 40Gbyte hard disk and a web browser for the year worldwide sales of DVD-Video connection. We are still a long way from connection to the intemet and downloading players will have reached 100 million. The this situation, especially in the UK. But content. huge uptake has led to interest in DVD

390 May 2002 TELEVISION recording. In the audio market, the sale of blank audio tapes has declined while the sale of CD-R discs has grown. Discs have several advantages compared with tape, including random access and easier storage. An attractive feature provided by DVD recorders is instant recording — press the record button and the machine automatically finds available blank space on a disc. Several DVD recording format have been developed. I'll provide a brief overview before considering Sony's strategy in this market. There are two basic DVD recording formats, write-once and rewritable. With the former, data recorded on a blank disc cannot be altered or erased: with the latter, data can be over-written and the disc re- used. Write-once formats use an organic dye as the recording medium, above the disc's reflective surface. The record laser alters the physical structure of the dye, making it non-reflective when the laser is One of Sony's new Wega plasma TV sets, see text. switched on. The playback laser, operating at a lower temperature, detects the reflective and non-reflective sections of the and DVD+RW discs. play rewritable discs with a DVD-Video track, interpreting them as binary ones and Blank recordable DVD discs can store player the disc has to be finalised, as with a zeros. between one and six hours of video, CD-R disc. During finalisation a menu Rewritable formats use phase-change depending on picture quality: as the screen is created, providing easier technology. The discs have a recording time is extended, the data rate playback operation. recording/reflective layer that contains a and picture quality are reduced. Most DVD The DVD-RW and DVD-RAM formats complex mixture of rare-earth elements. Its recorders offer several recording modes, also offer a VR recording mode that has natural state is crystalline, which is with picture quality varying from DVD- MiniDisc-type editing features such as the reflective. The pulsed recording laser Video to VHS. But identical recording- selective deletion of recorded scenes and converts sections of the track to an time settings can provide different levels of the ability to vary the playback order. But amorphous state, which has much lower picture quality depending on the format the VR mode is incompatible with nearly reflectivity. The low-power playback laser used for audio recording. Two-channel all existing DVD-Video players, though interprets these reflective/non-reflective PCM audio recording requires six times many future players may offer sections of track as ones and zeros. An more data than two-channel Dolby Digital compatibility. intermediate laser temperature converts the audio. Thus with PCM fewer bits are recording layer back to a wholly crystalline available for the video. As with DVD- The Sony approach state ready for a fresh recording. Video, DVD recorders store content in the The result of all these recording formats form of files and chapters. and permutations is a potentially confusing Recording formats The DVD-R, DVD+R, DVD-RW and mixture of disc compatibilities. For this There are five DVD recording formats, DVD+RW formats provide recordings reason Sony has decided to launch a dual- two write-once and three rewritable. DVD- which, in theory at least, are compatible format DVD recorder later this year, R and DVD+R are write-once formats, with ordinary DVD-Video players. DVD- conforming to the DVD-RW and the using organic dye and a disc surface with a RAM is incompatible with DVD-Video DVD+RW formats. The latter is an groove (with DVD-Video and DVD-ROM because of its use of land-and-groove `unofficial' format developed by Sony, discs there's no groove). The DVD-RAM, recording and the fact that the discs are Philips and others. The advantage claimed DVD-RW and DVD+RW rewritable normally kept in a protective caddy. To is very high compatibility with DVD- formats all have a groove: while the DVD- RW and DVD+RW formats use only the groove for recording, the DVD-RAM Sony's HAR-D1000 hard-disk audio recorder. system records on both the groove and the `land' area between. Fig. 1 compares these formats. The DVD-R, DVD+R, DVD-RW and DVD+RW formats have a track pitch of 0.74 microns between groove centres — this is the same track pitch as DVD-Video and DVD-ROM, though there are no grooves with these playback-only formats. With DVD-RAM the track pitch, between adjacent groove and land areas, is 0.615 microns. The DVD-RAM format provides hard- disk type features such as high-speed random access, and the discs can be rewritten up to 100,000 times — this compares with 1,000 times for DVD-RW

TELEVISION May 2002 Sony has no plans to include DVD-RAM go on sale in May. in its product range, arguing that the Model D-VM1 is the first DVD-Video format does not have compatibility with Walkman, which can be used with a DVD-Video. In addition, since DVD-RW dedicated LCD monitor or a home IV set. and DVD+RW are similar, it's easier to It weighs 571g and measures 150.2 x 31.8 develop a recorder that caters for these two x 167.7mm (w x h x d). standards The Picot name has been given to a series Sony has launched DVD-R and DVD- of DVD-Video players aimed at the 15-25 RW media discs in Europe. age group. The first product, Model DVP- PQ1, is a portable player that certainly Blu-ray optical discs looks different. Its front panel can be Sony is one of the nine companies that customised, using reversible inlays, and support the new Blu-ray high-density there are plans to offer downloadable video disc format — a brief summary of its inlays from a special website. characteristics was included in Teletopics last month. It uses a blue-light laser and Digital imaging discs with a recording capacity of up to Sony dropped the Video 8 format last year 27Gbytes, almost six times that of DVD. but continues to market Hi-8 camcorders. They will be able to store more than two There are three new models, CCD-T748, hours of high-definition video or almost CCD-TRV208 and CCD-TRV408. They thirteen hours of standard-definition video. include a new, proprietary Easy Dubbing Although the system has still to be ratified feature that provides various editing by various standards organisations, Sony possibilities using any brand of VCR believes that Blu-ray could be on the without the need for a LANC editing cable. market in Japan next year. The user can connect his camcorder to a The announcement of Blu-ray puts a VCR via pre-subscribed infra-red codes question mark over the long-term future of and use the camcorder to control both Sony's DVD-Video player Model DVP- the current DVD recording formats, but devices. F41MS is compatible with Memory Stick Sony argues that Blu-ray is not a DVD Sony has no doubts that the future of the cards. format and says that it is committed to camcorder market will be digital. In 1998 making a success of DVD-RW and only 13 per cent of the camcorders in Video players (at least 90 per cent). DVD- DVD+RW. Europe were digital: Sony expects the RW is an `official' format supported by digital percentage to rise to 71 per cent this Pioneer, Sharp, LG and others. The Sony DVD players year. The company supports two digital DVD recorder will also read and write Model DVP-F41MS is Sony's second camcorder formats, MiniDV and DVD-R and possibly DVD+R write-once DVD-Video player that can be installed MicroDV, as well as the hybrid discs. Sony suggests that they could be either vertically or horizontally, a feature analogue/digital format Digital 8. used for a number of purposes such as that first appeared with the PlayStation 2 This year Sony is offering USB recording TV programmes, transferring games console. It's also the first DVD streaming as a standard feature with its VHS footage to DVD and storing home player to have compatibility with Sony's new digital camcorders. Media streaming video movies on disc. Memory Stick memory card system. works by sending audio and video as a As different people will use different Memory Stick, about the size of a stick of continuous data stream instead of as files recording formats and modes, a dual- chewing gum, is designed for storing downloaded on to a hard disk. The format DVD recorder will be able to cater images, audio and data. The current advantage is that you don't have to for a wide range of users. It will be maximum storage capacity is 128Mbytes, download a complete file before listening possible to produce recordings that are but larger-capacity versions are being to a music clip or watching a video file. compatible with DVD players and developed. But why would anyone want to Thousands of websites now use media recorders owned by friends and relatives. use a Memory Stick in a DVD-Video streaming technology, from companies Sony refers to this as "disc player? Sony explains that users can play such as RealNetworks, Microsoft and communication". The PAL version of the back music downloaded via a PC or the Apple. recorder may also offer a progressive-scan interne without having to use the PC for In order to use the USB streaming output — Sony says that the DVD Forum is the playback. The DVP-F41MS can also system, you have to connect the camcorder currently finalising the standard for this read CD-R and CD/RW discs with MP3 or to a PC via a USB port and install USB feature. JPEG data files. A graphical interface driver software and third-party enables the user to read the contents of conferencing software such as Microsoft Sony's new MiniDV camcorder Model DCR- recordable CDs or Memory Sticks on a TV NetMeeting. This enables a camcorder to TRV50 incorporates Bluetooth technology. screen. become a webcam and broadcast live video The DVP-F41MS also uses a new across the interne — the frame rate is operating system, called Precision Drive 2, 30/sec and the resolution 320 x 240. which includes a high-speeding motor and Two new MiniDV camcorders, Models a dynamic tilt-compensation mechanism. DCR-TRV50 and DCR-TRV40, have 1.5 Sony claims that this provides more Megapixel CCD image sensors that accurate DVD tracking. The Precision provide a resolution of up to 530 lines. The Drive 2 OS is compatible with DVD-R, former model includes Bluetooth DVD+RW and DVD-RW discs, the latter technology, enabling it to be used with in both the standard and VR modes. other Bluetooth devices such as a mobile Another feature, Block Noise Reduction, phone. One application could be to post filters the borders of component blocks in live footage of your latest holiday on the the display and reduces on-screen block- web, using a Bluetooth mobile phone as a noise artefacts. The DVP-F41MS is due to wireless modem.

May 2002 TELEVISION Fig. 1: The DVD-RO M/DVD-Video, DVD-R/DVD+R, DVD-R W/DVD+R W and DVD-RA M disc formats compared.

Sony is to launch two new MicroDV Audio audio recorder, Model HAR-D1000. The camcorders, Models DCR-IP45E and Sony co-invented the Super Audio CD hard disk has a 40Gbyte capacity, DCR-IP55. The MicroDV format uses format, which uses a one-bit audio enabling it to hold the contents of up to videocassetes that are 70 per cent smaller encoding system called DSD (Direct 500 CDs using the ATRAC compression than with MiniDV and MPEG-2 video Stream Digital). It's claimed to be more system. The HAR-D1000 has a CD tray compression. Both models have USB efficient than the PCM audio technique and can copy discs at 2x speed. It can be streaming capability while the latter model used for audio CD and DVD-Audio. Sony linked to a PC for downloading audio incorporates Bluetooth technology. And, to has combined SADC and DVD-Video, files. Sony says that it has no plans for a show that nothing is completely new in Model DAV-S400 being the latest hard-disk video product this year. technology, the two models include product to incorporate the two systems in Sony is to launch MiniDisc and Memory handgrip designs that were first seen with one box. The company has no plans to Stick Wallunen with a Net MD feature. Super 8 cine cameras. offer DVD-Audio products, and says that This uses a USB connection to transfer On the digital camera side, the Mavica there should be 1,000 SACD titles music between a PC and the music player still camera Model MVC-CD400 has a 4 available worldwide by the end of the at 32x speed, enabling 80 minutes of Megapixel CCD image sensor chip. It year. At present (March 2002) there are music to be transferred in 2.5 minutes. records images on 8cm CD-R or CD/RW almost 600 titles, 350 of which are There are to be four Net MD products, discs and, when connected to a PC, can be available in Europe. including Model MZ-Nl which weighs used as an external CD/RW drive. Sony is to launch its first hard-disk just 87g. • edde at? LL-La 1-. 11111111.11111• • —311111Z• Video & Computer Test Equipment at OZT1500: TELETEST PC www.mces.co.uk 8 test patterns VGA, S-VGA outpLts Amstrad, Pace, Grundig. 9V battery powered

Digital set Tuner / PSU fault £5.00 plus VAT top Box Major fault £55.00 plus VAT £159.95 ex VAT Amstrad DRX 100 tuner repairs £12.50 plus VAT Fault symptom "No Satellite Signal Received" OZT1110: TELETEST 2 6 test patterns, lkHz audio Pace "ZIF" tuner repairs £18.00 plus VAT Composite, S-video, RF outputs Fault symptom "Picture freezes" or "No Satellite Signal Received" 9V battery powered Optional Grundig Power Supply repairs £16.00 plus VAT — • accessories Fault symptom "missing channels" and "No Satellite Signal Received" M.C.E.S. Digital £159.95 ex VAT E-mail: sales@ mces.co.uk Tel: 01202 759911 Phone: 0161 746 8037 Fax: 01202 759922 Free Info Pack Intl: +44 1202 etc Fax: 0161 746 8136 www.teletest co.uk

TELEVISION May 2002 393 Avoiding virus attacks

PC viruses have become a plague and cause wasted time and effort. The solution is to play safe and install protection. This is available in various forms. Nick Beer surveys the current situation and makes recommendations

. he TV/video servicing industry March issues) Peter Marlow was slow to take to the use of mentioned Sophos as a provider of .1PCs as a business aid, despite anti-virus (AV) software. I have very their usefulness for such chores as little experience of this company's invoicing and spares ordering. Those products, because the company I work who are still sceptical about the need for sells and installs Norton Anti Virus for them might point to the virus products. The Norton brand name is a problem, which is getting steadily trademark of the Symantec worse. A virus attack can result in Corporation. Other well-known anti- many, many hours being wasted on virus brands are McAfee and Dr cleaning up PC(s) and data. But Solomons, both of which are owned protection against viruses need not be by Network Associates. You can expensive or cause heartache. I've obtain further information at these now had quite wide experience of companies' websites, as follows: virus protection and repair, with both single PCs and networks. The aim of http://www.drsolomon.com/ this article is to provide information to enable you to avoid infection http://www.mcafee.com/anti- problems. virus/default.asp? In a previous, very useful article on virus attacks (see the February and http://www.sophos.co.uk/

http://www.symantec.cotn/nav/ Fig. 1: The LiveUpdate screen in NA V2001. How anti-virus software LiveUpdate F.! works Anti-virus software is an PC application just like any others. When Welcome to LiveUpdate installed, usually from a CD-ROM LiveUpdate checks for updates to your Symantec products. You though it can be downloaded from the oézzies can decide which updates you want to install. web, it appears as a program in Microsoft Windows. There are 9 different modes of protection, as LiveReci follows. ``24, LiveUpdate

2.1 Norton AntWirus 2001 (1) Real-time protection. If an e_•_1 Norton AntWirus Virus Definitions infected file is opened the software detects this, stops the virus infecting ¡It; Rescue Disk 2001 your system and puts the file out of A elt SARC Submission Software Updates harm's way.

(2) Scan detection. The software scans your hard disk at a scheduled LiveUpdate will use the Internet to get your time each day, say at 1 pm while you Configure... updates. are out at lunch (because the PC will be slowed down while the scan is being carried out), or on demand. Click Next to see what updates are available. Alternatively if you want to transfer the contents of a CD or floppy disk to your PC, you can scan the disk first. INext > I Cancel Help

r•-1 May 2002 TELEVISION (3) E-mail protection. E-mails are monitored as they are downloaded and any viruses present are prevented from doing any harm.

What the software actually does depends on which version of which software is in use, but when it detects a virus it will either automatically, or prompted by the

user, try to clean the infected file. If it is Tope/ Osage In... led. .. end we cede.. sof ea. spew ww wvagenle at She Mete. unsuccessful it will quarantine the file, i.e. fen. • Parls• M ee of the Plane put it in a safe folder where it cannot be eeesomm ad r KNoreseft Internet Eosplerer accessed. When you are happy that the AddHOwnal 468 Kb/ Do...ad Tune 1 nun Semen» Internet Explorer 6 os a set of core terfoncdoges on %Endo . Ste Herne EdRion and enntleers 546 De .• env«. quarantined folder is disposable, it can be Pronessoonel. In edger., Internet Explorer 6 prowdos • Pnvete. ',M ee.. end ft. ,d.. Inessorog erponence end the freedom to exponent* eh. best of Me Internet for users of tande m Mdlennerm deleted from quarantine. bp:=. Edsbon (Windows Me), endues 2000 Protestant,. 011 and Weldor.. Vs Second Pelson, and * Mows VT. 4.0 Worlostwoon Total download sae for • ',Weal of areprom mately 25 megabytes (Mel). However, because Setup docrecedo only those Ides that are necessary for your computer, th. use un vary lutouen II 4nd 75 Me •• ° •

Why doesn't it always work? OTHER sins r Wi.1••• **S..' Update Medicate. 3.5 Si Kt/ Download Tens,: 4 1 nun

It's usually your fault! Hundreds of new Docresed Iles component end never moss o Cntscal Update mum when.r.er • new Crelual r000 os 1 1 L e • " released, you me be nobSood Incresoft Sot Improved endows Cronus' Updete Nobfouton by addong a viruses are created every month. Most are feature 'Wee Nov. en. component to update itself es Improvements end new teetures Peterne evadable rhos ts en updated verso°. of Cnoul Update Noencatwon MICROSOPY variations on a theme, some are new. Anti- WIY4DO ws SANELY virus companies will generally know about r HISS ti..... ,.e 4.6 1616 KS/ Download Tome: 4 rrorn 11 2 alltRosor them before you do. They update their OFIIIE M5S1 Messenger lets you see when your fnends ere onlone, send an ester« message, send 4 fole (tor PROOrml rrousoc or photo»), have a race chat, or send a message to m ow. You un even rnalt• tans software to detect the new viruses, and UPDATES horn your computer to a phone almost anywhere rn the world for • y low réte, .rotot • frend to Pier en wohne game, and much more

usually have 'virus definitions' at their r tout Eertlfir rotes Update websites for downloading within hours of the first infection. Most AV software has an auto-update facility: you connect to the Fig. 2: The Windows Update site. internet and it downloads all the updates and installs them for you. 3 Checking Available Updates.. - 14cm:oft Internet Explorer provided bp Nick Beer For example Norton Anti Virus 2001/2 has a facility called LiveUpdate, see Fig. 1. When you purchase the software — it costs about £35 including VAT — you get one year's free updates. After this you pay Please Wait... to continue the updates or buy the latest Windows Update is custo mizing the product updates catalog for your computer software, which comes with another year's This is done without sending any information to Microsoft. inclusive updates. LiveUpdate can be set so that each time you connect to the interne it checks — behind the scenes, without you doing anything — for updates and either Fig. 3: Message displayed when using Windows Update. automatically, or after checking with the user whether it's OK, downloads and installs them. http://windowsupclutc.microsoft.com/defau which it was linked in a network). Another So how can you get hit by a virus? It.htm promised that the attachment contained a Simple: you haven't kept your virus picture of Anna Kournikova. Who admits definitions up-to-date. Check at least every Alternatively, if you have a later to opening that one?! couple of days. Microsoft operating system, click the A particularly annoying trend is when Viruses exploit software weaknesses and Windows Update option in the start bar. people, who usually think they are being user weaknesses. Many viruses exploit The site will look at your current helpful, send on virus warnings to their 'security loopholes' in certain Microsoft installation on-line and provide a list of the friends. This may seem ungrateful but, in products — Windows, Internet Explorer things you should update (Critical my experience, most such warnings are in and Outlook Express. This is logical: Updates) and some options as well. See fact hoax viruses. Microsoft is by far the most widely used Figs. 2 and 3. software, so those who want to cause What about user weaknesses? There's If you think you have a virus trouble concentrate on it. Since it's an apathy, because even when people know If you think you have a virus, run a full almost impossible task to test all the precautions they should take they don't system scan with the latest definitions permutations with a piece of software, we do so. And there's stupidity when, despite installed on your anti-virus software. If it have to accept that all software potentially all the warnings, people get caught out by doesn't find anything, check out at your has bugs. opening e-mail attachments. Never open AV software provider's website. For When Microsoft spots or is made aware an e-mail attachment unless you are example at the Symantec Antivirus of a security issue with one of its products, expecting it, even when it's from someone Research Centre site it usually reacts very quickly (there have you know. If curiosity is killing you, http://www.sarc.com/ (see Fig. 4) you can been exceptions!) and provides free ensure that your virus protection is up-to- search keywords, message subjects, etc. It patches for downloading at its websites. date and scan the attachment first. Never also lists all the hundreds of hoaxes. But what it cannot do is make you open a .pif or .exe attachment. If you think your virus has been e-mailed download and install them. Unless you do, One of the most successful viruses of all to your contacts in Outlook or Outlook you will be vulnerable. So, as with virus time was the "I love you" virus. People Express, check your Sent Items folder and definitions, you must keep your operating saw that message and, even though it was see. Pass on only warnings that are valid. system, interne browser and e-mail client from someone they'd never heard of, Don't loose friends! software updated. This is simple with opened the attachment and instantly A classic hoax that has been around for a Microsoft. Visit the website at infected their PC (and any devices to few months is the sulfnbk.exe warning.

TELEVISION May 2002 395 317, e -customs. Peter Marlow's recent article, removal tools for the common viruses. It's the Symantec. security response wrong approach to the problem but, once you've got a virus, it's the only answer. united states For examples visit elobel diet latest virus threats security advisories

Products • Symantec Enterprise Security Solutiur cic • VBS Manisemn hup://www.symantec.com/avcenter/tool purchase for susceolibinty to the Common Desktop s.list.html • W97M Brmronment (CDC] remote root access Buffer sennce I support 214..11sed W32 Elkem 3587 ei • Symantec Enterpnse Security Solutions che'- security response Other options e W32 Klez Elemm for susceotibilfty to the Microsoft UPnP Buffer darnloads Dyerflow and DoS yulnerabildies Some believe that the best way to avoid e Truant Suffer • Buffer Overflow in System V Dewed Login about syrnantec virus threats is to avoid Microsoft • Malformed Microsoft Excel or PowerPogft • Vv97M Fifteen search documents byoass Microsoft macro security products. Most homes and businesses use features PCs with Microsoft software however, so feedback E.nanded Threat List and • Mutt-vendor Unicode IDS bypass Virus Encyclooedii the present article has concentrated on Ericianded Security Advisory List 1,44 this. Apple Macs use Microsoft browser • 1941•2001 Serriantec cereeraboe and e-mail client software, while PCs may Al eel* maned notrer use non-Windows operating systems such Prnacy virus definitions updates as Linux, Unix or 0S2. These have their own risks, which are best left to those erne Dellellemer Sect» rik trotte on with relevant experience. But some will , ,yroes1 Yen Derrtons tly.• an 16) uo Dervilens Added Le t edele 2 (Dec 21 decide to use non-Microsoft browser and Free ',tine Was sod Satiety Cnegr (Jr lloYy 001 use Lrysikslale to doonfOrei Dethrone' M elee (Dec 21) e-mail client software with their TtYy Oui Purchase and Adroit my Denton Subscr on? Windows-based PC. There are various downed:id Definitions enough , options here. Netscape has the Navigator removal tools am I protected? browser (http://home.netscape.com/computing/do W32 Goner iemm Nceton Azle/el. Den crested Jeremy 16 end released W32 Badtrans Eternm wnload/index.html?c hopOlft6) and A mery 16 W32.Nimda Earnim Nolan Artninrs Carp Eamon Deis Verson 401160 Communicator e-mail client Nolen Arehu3 Carp Ecton Sequence teeter 14340 W32 Mande Atimrri Norton MO WN!' la Mec Del, released December 31 W32 FunLcma 4099 (http://info.netscape.com/fwd/hop0 I ft 1 /ht Treed Viruses Detected 5E1459 i3ii2Laitsins_Wro gsarp tp://mailredirect.netscape.comn software. Other e-mail client software is Lotus Fig. 4: Symantec's anti-virus site. Notes (http://www.lotus.com/home.nsf/welcome This is an e-mail from a friend telling you roducts/products.cfm?ProductID=23&PID /notes) and Eudora that he thinks he might have passed on a =10275709&EID=0 (http://www.eudora.com). The problem is virus. It tells you to check your that the Microsoft product comes with Windows/system directory to see if you We run this system with our Windows your PC. Others may also be free, but have this file. If so, it says, you are 2000 Advanced Servers and workstations they have to be downloaded and set up. infected and should delete the file. But it's running Windows 2000 Pro, ME, 98 and Some people can't bother. a Windows system file, and should be 98SE, and have installed it on clients' The e-mail client software you decide to there! networks running Windows 2000 and use with a business network will be a NT4 Server. different decision from what you choose Server systems to use at home. Network e-mail servers 11 you have a network with a server ISP's role such as Microsoft Exchange, Floosietek computer running a server operating You can also check your ISP (Internet FT Gate (http:/www.floosietek.co.uk — system (Windows NT4 Server, or Service Provider). The recent Nimda 32 extremely good value for money), Lotus Windows 2000 Server in its various virus attacks hit users at all levels. They Domino versions) you can use a brilliant product were extremely inconvenient, and cost a (http://www.lotus.com/home.nsf/welcome from Symantec, Norton Anti Virus lot of companies a lot of money to clear. /domino) and Tobit David Corporate Edition. It might sound a bit Two massive and very prominent ISPs (http://www.uk.tobit.com) will be running over the top for five or so PCs in your were spreading the problem, because they on local servers, and e-mail client shop. But look at it this way. You have to were using Windows-based servers that software will talk to them, not the ISP. buy five copies of an anti-virus package, they hadn't patched, despite the security Most will run with most clients, but one for each PC, at about £35 each. Then, alert being well known and a patch having David comes with its own client software, every few days, you have to go to each PC been available for, I think, about two which also handles faxes, SMSs and and connect it to the interne to update its years. voicemail. This is a complex subject that definitions. Are all your PCs connected to Some ISPs offer an e-mail pre-scanning requires a separate article. the Internet? Do you have the time to go service: e-mails are scanned on their round updating them all? Can you rely on servers before delivery to you. The In conclusion the individual users to do it? Exeter-based ISP Eclipse Internet offers I hope that this article, along with Peter Why not use a program that's installed this service for example. For more Marlow's previous one, will have on a server computer and automatically information visit heightened your awareness of the PC virus downloads new definitions to a schedule, threat while explaining what can be done passing them to each connected PC http://www.eclipse.net.uk/index.cfm?Id to prevent it causing you trouble. It's a automatically. No user intervention =Product&product=mailsafe fascinating subject, though you won't agree required! It also handles the more complex if your first experience of viruses is when security issues with server operating If you get caught you have been infected. A check at the systems. For more information visit If, despite all the warnings here and various sites mentioned in this article will elsewhere, you do get caught most AV keep you entranced for days. Just don't http://enterprisesecurity.symantec.com/p software providers have, as mentioned in panic! •

396 May 2002 TELEVISION Grandata Ltd distributor of electronic components CD Pick Ups and Mechanisms

Part No Price Part No Price KSS 210A KSS 213 F £12.00 Original £14.00 KSS 240 A £30.00 KSS 210A NKS 240 A Replacement £11.00 Replacment for KSS240A .£20.00 KSS 210 B £15.00 OPTIMA 6 S £11.50 KSS 213 B £11.50 OPTIMA 5 £11.50 KSS 213 C £11.50 RCTRTH8151 £20.00 KSS 213 D £16.00 RCTRTH8112 £15.00 CD Mechanisms KSL 2101 ABM Mechanism Code: KSL2101ABM Price : £ 18.00 KSM 213 CCM Mechanism Code : KSM 213 CCM Price : £ 15.00 RCTRH8147 Mechanism Code : RCTRH8147MECH Price : £ 10.00 CDM 12.1 Mechanism Code : CDM121MECH Price : £ 16.00 SF91 Mechanism Code : SF91MECH Price : £ 20.00 SF91 Carriage & Mechanism Code : SF91CARR Price : £ 20.00

105°c Radial Electrolytic Capacitors

VALUE CODE PRICE PER VALUE CODE PRICE PER VALUE CODE PRICE PER VALUE CODE PRICE PI Digital Capacitance PACK PACK PACK PA( UL M,' 61Volts MULY_Qtti..-.G.Onlinlied Meter 100uF ..CAP118 . 10.45 1uF . . . .CAP130 £0.40 0 22uF .CAP145 £0.45 22uF CAP148 £1.80 10 470uF . .CAP29 . £1.20 33uF ..CAP131 £0.40 o 47uF .CAP73 . 10.35 33uF CAP149. £2.30 10 1000uF .CAP119. £1.50 4 7uF . .CAP132 .£0.45 1uF . . . .CAP74 10.35 100uF CAP150.£3.25 5 2200uF .CAF'120 £2.10 10uF . . .CAP52 . £0.50 2 2uF ..CAP75 . £0.35 22uF . . .CAP53 . £0.45 3 3uF ..CAP76 . £0.50 200_V9.111 ILYsdis 33uF .CAP54 . £0.50 5 4 7uF .CAP77 10.35 . .10 100uF CAP151..£3.25 5 22uF ...CAP121 £0.35 .10 47uF . . .CAP55 . £0.85 10uF ...CAP78 10.50 . 10 33uF ...CAP122 £0.35 .10 68uF .CAP133 £0.55 15uF . ..CAP79 5 ZIO_Yeti 47uF ...CAP123 £0.35 .10 100uF . .CAP56 . £0.85 22uF ...CAP80 . £0.75 1uF CAP152. £0.60 10 100uF . .CAP124 £0.60 .10 150uF . .CAP57 . £0.95 5 33uF .CAP81 . £0.85 ..10 .1 3uF CAP104. £1.75 10 220uF . .CAP125 £0.80 .10 220uF . .CAP58 . £1.45 5 47uF .CAP82 . £0.95 ..10 10uF CAP105. £2.60 10 330uF ..CAP30 . £1.75 .10 330uF CAP134 £1.60 68uF . ..CAP83 £1.30 5 22uF CAP153. £2.30 10 470uF . .CAP31 . £1.75 .10 470uF .CAP135 £1.75 100uF ..CAP84 £1.20 47uF CAP106. £4.35 10 680uF . .CAP32 . £2.10 5 680uF .CAP59 . £8.50 .10 150uF .CAP85 . £2.80 5 100uF CAP154. £4.50 5 1000uF .CAP33 . £2.10 10 1000uF .CAP60 . £4.35 220uF ..CAP86 £2.80 220uF CAP155. £2.00 .2 2200uF .CAP34 . £5.25 10 2200uF .CAP61 . £2.45 330uF ..CAP87 £4.00 3300uF .CAP35 . £5.00 5 3300uF CAP62 £10.00 470uF ..CAP88 . £5.25 31Q_Vselta 700uF .CAP38 . £6.10 10 4700uF .CAP136 £3.50 2 680uF .CAP89 £5.00 . .10 luí CAP156. £0.70 10 3.5 Digit LCD 1999 Count 1000uF .CAP90 . £5.40 5 MLYOK5 I 3uF CAP157. £1.50 10 OuF . .CAP37 . £0.45 .10 1uF CAP137 £0.35 10uF CAP158. £2.25 10 9 Selectable ranges from 200pF to 20mF 1O 203biti 22uF CAP159..£3.40 10 22uF . .CAP38 . £0.45 .10 2.2uF CAP138 £0.35 47uF .CAP91 . 10.50 5 Supplied with Holster 33uF LAPIN £0.40 .10 3 3uF . CAP139 £0.35 uF . ..CAP92 . £0.85 10 7uF . ..CAP39 . £0.48 5 4 7uF CAP140 £0.35 .10 1 5uF CAP93.....£0.70 441LYCIIII High Accuracy 1uF CAP107. £2.15 5 68uF ...CAP127 £0.55 10 10uF . CA M . £0.50 1 2uF CAP94. (0.5% < 2000uF, 1%:2000uF , 2%:20mF) 100uF . .CAP40 . £0.70 10 22uF .CAP64 . £0.70 2 2uF CAP108. 12.25 3uF CAP95 .£0.50 5 External control for zero adjustment 120uF . .CAP128 £0.85 10 33uF .CAP141 £0.85 4 7uF CAI.96. .£0.50 5 4 7uF CAP109...£3.15. 160uF ..CAP41 . 10.95 5 47uF CAI.65 £0.85 10uF CAP97 £0.95 10 10uF CAP110...£4.00. Overload indication 220uF . .CAP42 . £1.20 10 68uF CAP142 £0.90 22uF CAP98.11.05 10 22uF CAP111....£2.50. Safety designed test probe. 30uF .CAP43 . £1.40 5 100uF .CAP66 . £0.85 .10 i3uF CAP99..11.55 5 47uF CAP112...£3.50.. 100uF . CAP160 £4.00 470uF . .CAP44 . £1.90 10 220uF . .CAP67 . 11.75 47uF CAP100 .11.75 10 Powered by 9V battery 680uF .CAP45 . £3.15 5 330uF .CAP68 12.45 .10 100uF . .CAP101 _12.10 10 220uF CAP181 17.00 1000uF .CAP46 . £3.65 470uF CAP69 . £4.35 .10 220uF ..CAP102...18.00 5 450 Volts 01500uF CAP47 £3.90 5 680uF .CAP70 . £4.90 5 470uF .CAP103.16 00 1uF CAP113. £2.80 . Order Code : 24504S 2200uF .CAP48 . £2.00 2 1000uF .CAP71 £5.25 .10 2 2uF CAP114 . £3.20 5 3300uF .CAP49 . £2.20 2 1500uF .CAP143 £4.50 5 160 1101 4 7uF CAP115. 14.95 5 Price : £ 28.00 + vat 7D3uF .CAP50 . £3.65 2 2200uF .CAP72 £3.25 2 2 2uF CAP148 £0.45 10 10uF CAP116. £5.50 5 6800uF .CAP51 . £3 90 2 3300uF .CAP144 .£3.25 2 10uF CAP147 £1.40 10 22uF CAP117. £4.15 2 Postage : £ 3.00 + vat

KR House, Unit 15, Pop In Commercial Centre , Southway , Wembley , Middlesex. HA9 OHB England Tel : (020) 8900 2329 Email : [email protected] Fax : (020) 8903 6126 Website : http://www.grandata.co.uk Grandata Ltd distributor of electronic components Television Repair / Mod Kits

L CODE MAKE KIT TYPE CODE MAKE KIT TYPE CODE MAKE KIT TYPE & MODEL & MODEL & MODEL

ALBA pifiktel 1452T POWER SUPPLY ONWAKIT AV29SX1EK .FIELD OUTPUT KIT .JVCKIT1 310.10708 PHILKIT3 1427T POWER SUPPLY ONWAKIT AV29SX1EN .FIELD OUTPUT KIT .JVCKIT1 310.20491 PHILKIT2 1402 POWER SUPPLY ONWAKIT AV29SX1EN1 .FIELD OUTPUT KIT .JVCKIT1 310.20496 PHILKIT10 1455T POWER SUPPLY ONWAKIT AV29SX1PF .FIELD OUTPUT KIT JVCKIT1 310.31994 PHILKIT6 1456T POWER SUPPLY ONWAKIT AV29TSIE1 FIELD OUTPUT KIT JVCKIT1 310.32252 PHILKIT5 1458T POWER SUPPLY ONWAKIT C14E1EK POWER SUPPLY ONWAKIT 310.32253 PHILKIT4 1459T POWER SUPPLY ONWAKIT C14T1EK POWER SUPPLY ONWAKIT 316.32254 PHILKIT9 1499Y STANDBY FAULT MODKIT37 C21ET1EK POWER SUPPLY ONWAKIT 310.32255 PHILKIT7 2002 POWER SUPPLY ONWAKIT CS21M3EK .POWER SUPPLY ONWAKIT 310.32262 PHILKIT8 2009B POWER SUPPLY ONWAKIT 310.62264 PHILKIT1 2052T POWER SUPPLY ONWAKIT MAI M ANUBIS A SOPS PHILKIT2 2152T POWER SUPPLY ONWAKIT 1455 POWER SUPPLY ONWAKIT CP110 CHASSIS SOPS PHILKIT8 2099TX STANDBY FAULT MODKIT37 1498 POWER SUPPLY ONWAKIT G90A CHASSIS .SOPS PHILKIT10 BTV17 STANDBY FAULT MODKIT37 2086 POWER SUPPLY ONWAKIT G90B CHASSIS .SOPS PHILKIT10 CTV501 POWER SUPPLY ONWAKIT 2098 POWER SUPPLY ONWAKIT G110 CHASSIS .SOPS PHILKIT3 CTV701 POWER SUPPLY ONWAKIT 21V1N (BUZ90) .POWERSUPPLY .G RUNDIGKIT2 GR2.1 CHASSIS SOPS PHILKIT1 CTV840 POWER SUPPLY ONWAKIT 21V1T(MJF18004) POWER SUPPLY .GRUNDIGKIT3 GR2.2 CHASSIS SOPS PHILKIT1 CTV841 POWER SUPPLY ONWAKIT TVR18ORTT/21380 STANDBY FAULT MODKIT37 D-16 CHASSIS ..SOPS PHILKIT6 CTV485 POWER SUPPLY ONWAKIT HSM VIDEO . .SOPS PHILKIT5 MITSUBISHI JSM VIDEO .SOPS PHILKIT4 AKA1 AV1 SERIES .. POWER SUPPLY MITSKIT3 KSM VIDEO . .SOPS PHILKIT9 CT1417 POWER SUPPLY ONWAKIT CT1M5B POWER SUPPLY MITSKIT3 LSM VIDEO .SOPS PHILKIT7 CT2159U POWER SUPPLY ONWAKIT CT21M5BT POWER SUPPLY MITSKIT3 CT2162UNT . . .POWER SUPPLY ONWAKIT CT25M5BT POWER SUPPLY MITSKIT3 SAMSUNG CT2863UNT . . . .PO WER SUPPLY ONWAKIT CT21A2STX TDA 8178S MITSKIT1 CI5944 FRAME OUTPUT SAMKIT2 CT21AX1B POWER SUPPLY MITSKIT3 CI6844 FRAME OUTPUT SAMKIT2 DECCA/TATUNG CT21A3STX TDA 8178S MITSKIT1 VIK310 POWER SUPPLY . .SAMSUNGKIT TVC563 STANDBY FAULTY .MODKIT37 •CT21AV1BS POWER SUPPLY MITSKIT3 VIK320 POWER SUPPLY ..SAMSUNGKIT CT25A2STX . . .TDA 8178S MITSKIT1 VIK350 POWER SUPPLY . .SAMSUNGKIT POWER SUPPLY ..SAMSUNGKIT eQ U MAII CT25A3STX ....TDA 8178S MITSKIT1 VI375 CF25A5OF FRAME OUTPUT MODKIT36 CT25A4STX .TDA 8178S MITSKIT1 VI395 POWER SUPPLY . .SAMSUNGKIT CF25C22C FRAME OUTPUT MODKIT35 CT25A6STX . .TDA 8178S MITSKIT1 WINNER 1 .. .POWER SUPPLY ..SAMSUNGKIT C F28A5OF FRAME OUTPUT MODKIT36 CT25AV1B POWER SUPPLY MITSKIT3 CF28C22F FRAME OUTPUT MODKIT35 CT25AV1BS . .POWER SUPPLY MITSKIT3 SHARP CF28C28F FRAME OUTPUT MODKIT36 CT25AV1BD . .POWER SUPPLY MITSKIT3 51CSO3H POWER / LINE SHARPKIT1 CF29C42F FRAME OUTPUT MODKIT35 CT25AV1BDS . .POWER SUPPLY MITSKIT3 51CSO5H POWER / LINE SHARPKIT1 CT28AV1B POWER SUPPLY .MITSKIT3 59CSO3H POWER / LINE SHARPKIT2 GOODMANS CT28AX1BD . POWER SUPPLY .MITSKIT3 59CS05H POWER / LINE SHARPKIT2 147TT POWER SUPPLY ONWAKIT CT28AV1BDS POWER SUPPLY .MITSKIT3 59CSD8H POWER / LINE SHARPKIT2 149T POWER SUPPLY ONWAKIT CT29AS1 TDA 81785 MITSKIT2 66CS03H POWER / LINE SHARPKIT2 1430RA POWER SUPPLY ONWAKIT CT29A4 TDA 8178S MITSKIT2 66CS05H POWER / LINE SHARPKIT2 143ORS POWER SUPPLY ONWAKIT CT29A6 TDA 8178S MITSKIT2 66CSD8H POWER / LINE SHARPKIT2 1430RW POWER SUPPLY ONWAKIT CT29B2 TDA 8178S MITSKIT2 1450T POWER SUPPLY ONWAKIT CT29B3 TDA 8178S MITSKIT2 THOMSON 1455TS POWER SUPPLY ONWAKIT CT29B6 TDA 8178S MITSKIT2 35029400 THOMKIT2 2019R POWER SUPPLY ONWAKIT CT33B3 TDA 8178S MITSKIT2 35065920 THORNKIT1 2029T POWER SUPPLY ONWAKIT M5 SERIES . .POWER SUPPLY MITSKIT3 FV70 POWER SUPPLY .THORNKIT1 2029TA POWER SUPPLY ONWAKIT ICC7 CHASSIS.TDA 8178FS THOMKIT1 F16 CHASSIS ..FRAME GOODKIT1 NEI/NIKKAI ICC7 CHASSIS.FRAME KIT THOMKIT3 F16 CHASSIS . .LINE GOODKIT1 CE25 CHASSIS POWER SUPPLY .NIKKAIKIT1 ICC8 CHASSIS.TDA 8178FS THOMKIT1 F16 PSU GOODKIT1 C289FTXN POWER SUPPLY .NIKKAIKIT1 ICC8 CHASSIS.FRAME KIT THOMKIT3 F16 VIDEO GOODKIT1 C28F41FXN . POWER SUPPLY NIKKAIKIT1 ICC9 CHASSIS.EAST/WEST THOMKIT4 R3000 POWER SUPPLY THOMKIT2 GRUNDIG PANASONIC R4000 POWER SUPPLY THOMKIT2 CUC 7350 GRUNDIGKIT1 IC561 TDA 8175 PANKIT1 TX92F CHASSIS EAST/WEST THOMKIT4 CUC 7301/3 TX25XD60 VERTICAL 0/P IC PANKIT2 (BUZ90) POWER SUPPLY ..GRUNDIGKIT2 TC28XD60 VERTICAL 0/P IC PANKIT2 CUC 7301/3 T)(28XD70 VERTICAL 0/P IC PANKIT2 (MJF18004) . . .POWER SUPPLY ..GRUNDIGKIT3 TX29XD70 VERTICAL 0/P IC PANKIT2 TX-W26D3 VERTICAL 0/P IC ..PANKIT2 HINARI HiT14RC POWER SUPPLY ONWAKIT

ORDER CODE PRICE ORDER CODE erim ORDER CODE PRICE GRUNDIGKIT1 £ 10.50 ONWAKIT £ 12.00 PHILKIT9 £ 7.50 GRUNDIGKIT2 £ 10.50 PANKIT1 £ 7.00 SAMKIT2 £ 8.00 GRUNDIGKIT3 £ 10.50 PANKIT2 £ 9.00 SAMSUNGKIT £ 16.00 GOODKIT1 £ 11.00 PHILKIT1 £ 7.60 SHARPKIT1 £ 11.00 JVCKIT1 £ 11.00 PHILKIT10 £ 8.50 SHARPKIT2 £ 11.00 MITSKIT1 £ 3.00 PHILKIT2 £ 2.50 THOMKIT1 £ 7.00 MITSKIT2 £ 15.00 PHILKIT3 £ 4.00 THOMKIT2 £ 12.00 MITSKIT3 £ 6.00 PHILKIT4 £ 4.25 THOMKIT3 £ 9.00 MODKIT35 £ 9.50 PHILKIT5 £ 5.75 THOMKIT4 £ 4.00 MODKIT36 £ 5.00 PHILKIT6 £ 5.50 THORNKIT1 £ 12.75 MODKIT37 £ 6.50 PHILKIT7 £ 7.60 NIKKAIKIT1 £ 12.00 PHILKIT8 £ 4.25 Grandata Ltd distributor of electronic components Aerial & Digital Satelitte Accessories

SLx Distribution Amplifier Range 25mA Line powering on UHF Socket Auto line powering for masthead amps Designed for TV , Satellite and FM Receivers 10.5db Gain on all ports Isolation between outputs > 22db Separate UHFNHF inputs Noise figure < 4db Digital Compatible Frequency Range : UHF 470-863 Mhz CE and EMC Test Certified VHF 47-230 Mhz Order Code Price Order Code Price 2 Way SLX2 £ 8.00 + vat 4 Way SLX4 £ 13.00 + vat 6 Way SLX6 £ 18.00 + vat 8 Way SLX8 £ 18.50 + vat SLx Masthead Amplifiers UHF TV antenna pre amplifier designed for the professional aerial installer 15dB gain masthead amplifier ideal for majority of domestic installations

26dB gain masthead amplifier for longer cable runs (loss of more than 3dB) or if connected to passive splitters

Requires 12V DC power supply via downlead either via dedicated power supply unit or from a distribution amplifier with line powering SLx 15dB Gain Masthead Amp Order Code : 27830R Price : £ 4.30 + vat SLx 26dB Gain Masthead Amp Order Code : 27831R Price : £ 4.50 + vat SLx Masthead Amplifier Power Supply Order Code : 27832R Price : £ 5.00 + vat Postage when Ordering 3 or more of the above is charged at £ 5.00 + vat and will be sent by Parcel Force

SLx Link Eye SLx Amp By Pass Kit Allows control of Sky" Digibox via the For use with aerial amplifiers and Sky signal feed for second TV Digibox

Fully compatible with Sky' Digital Link Allows for operation of Link Eye in Order Code : 27833R conjunction with a distribution amplifier 1 - 9 Price : £ 6.50 + vat each 10 - 24 Price : £ 5.50 + vat each Order Code : 27829R 25 + Price : £ 4.50 + vat each Price : £ 5.00 + vat

SLx Link Eye and Magician 4 Combination Pack Make us of the SLx Link Eye in combination with the Magician 4 Remote Control to control your SkyTM Digibox

Magician 4 controls upto 4 different devices including full function on SkyTM Digibox

Comes in Retail Clam Pack

Order Code : 27834R 1 - 4 Price : £ 16.00 + vat 5 + Price : £ 14.50 + vat

Sky Digital Sky Digital TV Link Eye Remote Control Sky Digital Remote & Order Code : TVLINKEYE TV Link Eye Price Order Code Combination £ 10.75 + vat RCSKY 5 + Price : £ 18.50 + vat £ 7.99 + vat each Price 10+ £ 10.75 + vat 'CC 5 + £ 17.00 + vat each £ 6.99 + vat each

Grundig GDS200 Grundig GDS200/300 Digital Satellite Receiver Repair Kit Digital Satellite Receiver Repair Kit

EARLY PSU LATER PSU TYPE REV 03 MODEL: DSO - 0385 REV C DSO - 0375 REV A DSO - 0385 REV 5

Order Code: SATKIT34A Order Code : SATKIT34B Price : £ 10.00 + vat Price : £ 10.00 + vat Grandata Ltd distributor of electronic components

Konig Electronic I< Lji ll = E L E C TP9CINIC Spares E L E C T R O NIC

To mark our new association with Konig Electronics we are glad to offer the following Konig Remote Controls at Special Prices !!!

Konig No. Make Model/Part No. Konig No. Make Model/Part No. IR 9480 Daewoo DMQ14A1 , DMQ20A1 , DMQ2195 IR 9864 Philips RC7512 , RC7535 IR 9584 Ferguson RCU1734 , RCU1742 etc , T742 , IR 9546 Samsung ...RM100 T752 , T758 Akura Daewoo IR 9594 Ferguson. RH880 , T789 Goodmans IR 9325 Ferguson. RH885 IR 9432 Samsung. RM104 , CX532WT CX534VVT, IR 9259 Ferguson... RHT01 , RHT30 CX5312W, CX5325W IR 9639 Ferguson... RHT10 IR 9457 Sanyo JXBA, JXFF , RC307 , RC317 , IR 9719 Funai 30T1 , 30T2 , 31T1 RC318 , RC321 , RC612 , RC625, IR 9403 Goldstar ... 105-068 , CBT2190E , CBT4902 , RC628 CBT9905 IR 9530 Sanyo JXCL, JXCR, RC258 , RC642 IR 9854 Goldstar ...05-219J , 105-224V , 105-229H , Mitsubishi 939P036050 105-230C IR 9139 Sanyo JXGA, JXGE , RC700 , RC702 IR 9614 Grundig CUC5200 , CUC5303 , CUC5310 , IR 9460 Sanyo JXGT, JXGVV , JXGY , JXLB Metz JXLG , RC711 , SO2 , SO3 Siemens IR 9487 Sharp 01421 , 02021 , CV2121 , IR 9529 Grundig CUC5301 , CUC5302 CV3707 , CV3709 , CV3710 , Matsui DV1416 , SV2044 ,SV2145 Siemens IR 9711 Sharp RRMCG0739BMSA ,G1014BMSA IR 9479 Grundig TP715 , TP770 , TP771 , TP800 , RRMCG1023BMSA, G1036BMSA IR 9715 Grundig TRC1 , TRC2 IR 9788 Sharp RRMCG1031BMSA, G1046BMSA IR 9602 Hitachi CLE871A CLE871B , CLE874A, RRMCG1048BMSA, G1050BMSA CLE874B IR 9321 Sony RM640, RM641,RM641A,RM642A IR 9476 Hitachi CLE876A, CLE876B IR 9336 Sony RM650 , RM651 , RM652 , RM654 IR 9477 Hitachi CLE876C , CLE876D , CLE876E IR 9448 Sony RM656, RM677, RM687B, CLE876G RM687C, RM717 , RM719 IR 9982 Hitachi CLE922A, CLE922B IR 9123 Sony RM670 , RM671 , RM672 , RM673 IR 9576 Hitachi CPT1556 , CPT1557 , CPT1560, IR 9442 Sony RM681 , RM682 , RM683 , RM684 CPT1561 , CST1430 , CST1435, RM685, RM686, RM698 CST1560 IR 9575 Hitachi CPT2155 , CPT2164 , CPT2558 , IR 9452 Sony RM694 , RM820 RM828 , RM834 CPT2564 , CPT2566 , CPT2669 IR 9441 Sony RM816, RM817 , RM826 CPT2785 IR 9443 Sony RM830, RM831 , RM832 IR 9490 Matsui 076L067240 , 2076R , 2092T IR 9451 Sony RM833, RM837 IR 9573 Nokia FS4/1 , FS4/2 , FS5/1 , FS9 ,FS10 IR 9871 Sony RM836 , RM839 , RM883 , RM886 IR 9640 Orion RC37 , RC56 , RC565633 . ROO IR 9624 Telefunken FB330 , FB340 , FB345 , FB1330 , IR 9826 Panasonic EUR37211, EUR50100 FB1340 , FB1345 EUR50370,EUR51140..etc IR 9639 Thomson....14GM53, 14GM56, 14MS70, IR 9834 Panasonic..TNQ8E0461 21DS70 , 21MG51 , 21MS76 IR 9553 Philips RC5410 , RC5420 , RC5801 IR 9953 Toshiba CT9626 , CT9784,CT9785,CT9859 IR 9556 Philips RC5901 , RC5902 , RC5903 RC5904 RC5905

£ 6.50 + vat Buy 5 or more each £. 6.00 + vat each G ra ndata Ltd distributor of electronic components Konig Electronic ELECTIMMNIC Spares E L E C TFICD NIC

U MM . Replacement Line Output Transformers

Make Part No. Konid No. Our Code Price Ferguson ..06 D-3-093-001 , 06 D-3-512-001 FAT 3837....LOT204 ....£ 14.00 Hitachi 2433291 FAT 3664....LOT172 ....£ 13.50 Hitachi 2434002 FAT 30095 ..LOT226 ....£ 14.50 ITT/Nokia ..4515 0340, D 059/37, ME/6237-00 FAT 3727....LOT200 ....£ 12.50 ITT/Nokia ..4515 0345 , 4515 0378, D070/37 , D071/37 FAT 3790....LOT328 ....£ 16.00 ITT/Nokia ..4515 0348 , D 076/37 FAT 3843....LOT330 ....£ 16.00 Panasonic TLF 14584 F , TLF 14586 , TLF 14586 F FAT 30106....LOT41 ....£ 15.50 Philips 1352.5003 , 4822 140 10544 , 4822 140 10566 , OV 2094/40 FAT 30186 ..LOT433 ....£ 12.00 Philips 3111 258 30021 , 4822 140 10474 FAT 30192 ..LOT562 ....£ 15.50 Philips 37770 , 37771 , 37772 , AT 2079/15 FAT 30184 ..LOT129 14.00 Philips 4812 140 10294 , 4822 140 10294 FAT 3820....LOT125 ....£ 16.00 Philips 4812 140 10325 , 4822 140 10325 FAT 30167 ..LOT132 ....£ 15.00 Philips 4822 140 10353 , 4822 140 10356 FAT 3830....LOT284 14.00 Philips AT 2079/21 , AT 2078/21 , TFB 4090 AD FAT 30179 ..LOT395 ....£ 12.00 Philips AT 2079/17 FAT 30171 ..LOT288 ....£ 14.00 Philips AT 2079/23 FAT 30170 ..LOT289 ....£ 13.00 Sony 1-439-332-42 FAT 3925....LOT100 12.00 Sony 1-439-493-11 , 1-439-423-11 , 1-439-423-1 2 FAT 30089 ..LOT369 15.50

This is just a selection of Konig Line Output Transformers . Please call us on 020 8900 2329 for any that are not listed.

Replacement Televison Mains Switches

KN658304 KN668500 KN668800

For Sony and Sony Replacement for Grundig 29703-291.07 For Daewoo Price : £ 2.50 + vat Price : £ 2.50 + vat Price : £ 2.50 + vat

If you cannot find the Konig Spares you want in this advert please call us on 020 8900 2329 as this is just a small selection Grandata Ltd distributor of electronic components Remote Controls Brand Replacement Remote Controls *Codeless set-up *Teletext and Fastext *Pre-Program med for the latest models * Replaces broken and lost remotes Order Code Order Code Panasonic TV RCUNIO1M Grundig TV RCUNI10 Sony TV RCUNIO2M Sanyo TV RCUNI11 Philips TV RCUNIO3M Sharp TV RCUNI12 Hitachi TV RCUNI04 Goodmans/Alba/ Mitsubishi TV RCUNI05 Bush TV RCUNI13M Nokia TV RCUNI06 Matsui/Hinaril/Orion TV RCUNI14M Samsung TV RCUNI07 Sky Digital RCUNI15 er Toshiba TV RCUNI08 On Digital RCUNI16 Ferguson TV RCUNI09 Satellite RCUNI17 Grundig TV RCUNI10 Price : £7.50 + vat each Buy any 5 of the above and get a Special Price of £ 7.00 + vat each

We stock Replacement Remote Controls for over 23,000 different models Prices start from £ 5.50 + vat each Please call for a copy of our latest Remote Control Catalogue on 020 8900 2329

New Arrivals Semiconductor Comparison CD DVD Laser Lens Displex Display Polish A database of over 100,000 devices Cleaner "Displex" is an innovative polish Comes with Full On Disc sound Lists transistors , diodes , thyristors and IC's that has been designed to remove and Picture Set Up Contains pin assignments for discrete semicondutors scratches from the screens of Mobile Phones . Permits searching ans selecting according to type , casings etc

System requirement vrt- DVD "Displex" is available in 5g •ubes Pentium PC , 16Mb memory , Windows 3.1/95/98/NT dtok with one tube being sufficient for and a CD Rom Drive rrtd e 200 e approx 8 to 10 applicatic ns.

Order Code : VRTCDROM Order Code:DVDCLEANER Order Code: DISPLEX Price : £ 35.00 + vat Price: £ 5.00 + vat Price: £ 2.50 + vat

Check out our New Online Catalogue at www.grandatacomuk

We are stockist of all the following brands : Remote Controls Remote Controls , TV & Video Accessories Spares , CD Pick Ups ,Accessories PHIEEX

Remote Controls l< CT:JNJI = TV & Video Spares Line Output Transformers HIE EL_E C TFIO NIC AYUDA AL CD Pick Ups SERIICIO This advertisement is just a selection of our stock. Please contact us if you cannot find the part you are looking for.

* Please add £1 p+p and VAT to all orders (Unless Otherwise stated) * All components are brand new * We accept payment by Access , Switch , Visa , Cheque and Postal Order * All prices quoted are subject to availabilty and may be changed without prior notice E & OE K.P. House, Unit 15, Pop In Commercial Centre, Southway , Wembley, Middlesex. HA9 OHB England Tel : (020) 8900 2329 Email : [email protected] Fax : (020) 8903 6126 Website : http://www.grandata.co.uk Brian Storm describes The Panasonic the use and features of this digital video editing system, which works with IBM- Motion DV Studio compatible PCs

he Panasonic Motion DV Studio machines that have been upgraded, because program version 3.0 was released although the software will support IEEE Tearly last year. It provides non-linear 1394 protocols the hardware won't. More editing of digital video (DV) footage using sophisticated hardware cards and software an IBM-compatible PC, and is available in will be required with these older PCs. At the three different packages as follows: time of release the target operating system specilication and will exceed these was Windows Millenium Edition, as it requirements. But the speed of the hard drive VWDTM20E: This is a CD-ROM contains IEEE 1394 (FireWire) support as may well let the side down. This shows up as package for editing and embellishing standard. jerks during video playback, as frames of digital video footage. It contains non-linear I've tried Motion DV Studio 3.0 with video information are dropped when trying editing facilities, titling facilities, transition Windows 98 Second Edition, Windows to keep up with the sustained high data- selections and makes possible various ME, Windows 2000 and Windows XP. It transfer rate. Make sure that you always have effects. It's also possible to add animations seems to work correctly with all these DMA in the BIOS options enabled and, if and sound overlays. operating systems. But bear in mind that it's given a choice, opt for a higher spin-rate a consumer product, so Panasonic will not hard drive. VWDTM21E: The CD-ROM editing generally support it for use with business package plus an internal PCI card for a PC. operating systems such as Windows NT and Installation and running 2000. During installation of the program you will VWDTM22E: The CD-ROM editing be prompted for PAL or NTSC support, as package plus a PCMCIA slot adapter card PC requirements the two formats are not compatible for DV. for a laptop computer. For a PC to run Motion DV Studio 3.0 the When you run the program you will see the minimum requirements are: a Celeron screen shown in Photo I. The large The packages all rely on the PC to be used 333MHz main processor; 64Mbytes of window at the top, left shows the available having OHCI (Open Host Controller RAM or more to guarantee smooth picture, from the camera, tape or edit Interface) support. You can confirm this by operation; an Ultra DMA-33 hard drive with selection. Beneath this there are tape consulting your PC's Device Manager. at least 10Gbytes capacity; a main PCB that counter information and the camcorder Generally, most computers that came with supports OHCI; and a CD-ROM drive for controls. Windows 98 Second Edition or later installation. The right-hand clip-board shows the installed will support OHCI. This rules out Most modern PCs have a good editing information stored on the computer, including video clips, stills, audio clips and titling information. These can be dragged to the bottom edit line and assembled into a production of some kind. Fades, dissolves and other effects can be added here as well. In operation the program feels easy to use while being capable of sophisticated effects. It allows two different DV devices to be connected, with switching between them via the selection option beneath the tape-time indication. Once an edit has been completed it can be rendered as a DV file and sent back to the camcorder for recording on a DV tape — assuming that the camcorder has provision for DV in. Alternatively it can be stored on the PC's hard drive as an AVI file, an MPEG-1 file (for a video CD recorder) or an MPEG-2 file (for a DVD recorder).

Summary In conclusion, the program is easy to use and can provide excellent results. The only carp I have, which applies with most programs of this type, is the length of time it takes to achieve the finished result. A few minutes of creative programme editing can Photo 1: The Panasonic Motion DV Studio editing screen. mean literally hours of your time spent trying to get it perfect. •

TELEVISION May 2002 403 This 'I 7m. Trinitron-tube monitor's production run lasted for several years. Large numbers were sold as the Dell VC7EN. In Part 2 of his series Donald M. Henry looks at the operation of the frame and line timebases and their response to multisync signals from the PC, and lists some workshop experiences Servicing the Mitsubishi ITS6705K monitor

ost TV sets and cheap mounted vertically on the HV-SUB triplers. But things are rather monitors have a common PCB at the rear. Now for the different with a multisync monitor. M EHT/line output surprise: neither of these is the line You'll find FET switches, which transformer. Things don't have to output transformer, which is T502. are a welcome change. be arranged like this of course. Nor, incidentally, are they the Transformer and scan-coil Remember the Ferguson TX 10 'flyback'. Service manuals and efficiency decrease as the line chassis? It had a huge EHT catalogues seem to call anything frequency increases, because of transformer (it was also the chopper 'flyback' if it's connected to the former losses, and the width is transformer) and there was a tiny tube's final anode! This is a reduced. Monitors compensate for line output transformer. Most of us malapropism. The term 'flyback' this by increasing the supply in the TV trade would agree that the refers to the action of electron voltage to the line output stage. slightly more expensive two- beam(s) returning to the left-hand This can be done by using a FET as transformer approach has provided side/top of the screen when a DC-chopper, fed from the HT better overall reliability in a number deflected by the scan coils. We will supply, whose output is referred to of models over the years. It's the return to the EHT section of the as +B. Conditions that vary the +B same with monitors. In the TFS6705K in Part 3 next month. voltage are when the H-sync rate TFS6705K you will see a large The real LOPT can be found by from the PC changes or when the EHT transformer, T601-1, on the tracing back from the red/blue scan user control asking for a change in main board. It's joined by a white coil wires. It's a good idea to get width is pressed. This FET system rubber-insulated lead to a smaller into this habit, as the situation is will be covered when we come to transformer (T601-2) which is less than obvious with many the power supply in Part 3, but it's designs because of the number of important to mention the variable transformers and chokes present. supply before considering the res: of the line timebase circuitry. Multisync operation The need to produce displays at The main difference between a 625- different frequencies presents SOG sync line TV set and a multisync monitor another problem. The line output Pins 16-26: Pins 1-15 stage tuning capacitor that line ' frame is that in the former the line output stage operates at a single frequency, optimises conditions at one 15.625kHz, while in the latter it frequency obviously won't do so at must be able to change others. This is dealt with by using automatically between several rates. control circuitry that selects from a Typically this can be between range of tuning capacitors,

PWB sync 31.51cHz and 104kHz plus as the switching them in and out of circuit user switches between applications, as required. Because of the high Main PCB say from a DOS prompt to peak voltages involved, the high Windows-based programmes. gate impedance of an FET makes it Processor control Multisync frame rates also vary, an ideal switch for this purpose. board typically from 50Hz upwards to They are used in most about 130Hz. I recall the happy makes/models regardless of days of 405/625-line TV system whether control is by a switches and solenoids with sets rnicrocontroller chip or such as the Bush TV161 series and conventional logic circuitry. To PWB-DEFL-SUB those fitted with the Thorn 1400 maintain line linearity throughout chassis, along with the smells of the frequency range, the polarised Fig. 1: The sync-signal paths. burning Paxolin and sweaty coil inductance needs to be varied.

May 2002 TELEVISION In most designs this is done by using a relay, rather than an FET, to Table 1: Some com mon display modes connect another coil in parallel. In the frame timebase, adjustment Mode Resolution Line freq. Frame freq. H sync V sync to maintain full display height is carried out by resistive networks VGA1 720 x 350 31-5kHz 70Hz +ve -ve and adjustment potentiometers VGA2 720 x 400 31.5kHz 70Hz -ve +ve (cheaper 14in. monitors) or VGA3 640 x 480 31.5kHz 60Hz -ve -ve processor-based DAC control to set SVGA 800 x 600 35.2kHz 56Hz -ve -ve the V-drive voltage as appropriate 8514A 1,024 x 768 35.5kHz 87Hz +ve +ve for the deflection mode. XGA 1,024 x 768 48.5kHz 60Hz +ve +ve This flexibility is required to cater for the various input signal combinations. Table 1 lists details with two electronically-isolated stages. The frame scan coils are AC for various PC modes provided by sections. Pins 1-15 are used for the coupled via C411 (4,700pF, 25V). the Blackstar 1410 pattern frame timebase section and pins 16- A pump circuit is used to provide generator. 26 for the line generator section. the flyback, with the boost Note that while the sync-signal All are readily accessible after capacitor C403 (100pf, 50V) frequencies determine the scan rates removing the plastic plate from the connected between pins 4 and 5. An it is the combination of rates and underside of the chassis. adjustable DC offset is provided by polarities (either positive- or pin 4 of the M62358P DAC chip negative-going sync pulses) that Frame timebase IC452 to adjust the vertical centring provides the information required to The basic trame timebase circuit is of the image. This moves the entire define the operating mode. The shown in Fig. 2. The low-voltage raster up and down. The oscillator various modes conform to industry- frame circuitry in IC501 is fed with frequency is set by R406 (390k12) standard timing diagrams for the 12V at pin 14, via R408, while the and C406 (0.151.1F), which are active scan area, i.e. the video output stage receives an 27V supply connected to pin 13. This stage information. Setting these modes at pin 6. This section of IC501 receives the V-sync pulses at pin enables manufacturers to achieve contains an oscillator, a ramp 15, coupled by C409 (10pF). They the correct frame amplitude and generator and the driver and output are given a defined pulse length by select appropriate line timebase components for optimum size of the video display. The video-content R408 10 J5A4,3 From 1c452 position (left and right, up and 12V D —e— pin 4 C408 C down) is factory-memorised to C409 C403 via 0450 V pulse 100 C415 10 conform to the various modes. from 27V 25V 100 =1 47 J5A5.1 10 25V 0 50V Time to return to the specifics of IC451 pin .4... „) the TFS6705K monitor however. R406 390k R410 The sync-signal paths 22 1111— • Pump 3W Well begin with IC301, mentioned V osc 2 V cent 11. A.M.r C406 last month but now in connection 0 15 F C410 with the sync signals. See Fig. I. In 9. 220 V height Drive "1” 25V most PCs separate H and V sync from signals leave the DB15 IC452 J5A4,6 pins 5.6 subconnector on the video card at Ramp V drive V gee output pins 13 and 14 respectively. They 100 0 5W arrive at the TFS6705K's 13W3 300k 1/2 IC501 Scan connector, H at pin 9 and V at pin 10 2 033 coils 8.2 8, then pass to pins 6 and 8 of O 22 R404 0.5W IC301. As mentioned last month, 2k7 IC301 can alternatively accept a composite sync input at pin 4, from 1k5 those PCs that provide a SOG C412 33 1k5 C411 output. IC301 extracts the polarity 25V 1 4.700 as well as the sync rate information. 25V 22 It provides four outputs: H rate at Ramp out R490 1k5 R460 120k pin 15, V rate at pin 13 (these are 0— €) 13 1C450 R491 8k2 R461 82k J5A4.5 R415 now always +ve-going), H pol at C404 0 — N\A"— M A.,— • J5A4,7 1 0.33 pin 18 and V pol at pin 19. All head Charge rate R492 680 R462 62k 1W for the processor board at the front 0 - 1A.A.r— M.Ar —• R493 120k R463 100k of the monitor, beneath the CRT. C405 J5A4.9 0— We- 1A.Ar— We'll leave aside for the moment 0.33 1 R494 560 R464 8k2 what happens on this board. The H- 0 — M AI— VVV- rate pulses also end up at pin 16 of R495 510 R465 16k J5A4,8 the STK79905B line generator and err frame generator/output chip IC501 R496 1k5 R466 30k Fig. 2: The basic frame - they follow rather a long path to R497 560 R467 12k get there. The V-rate pulses arrive timebase circuit. at pin 15 of IC501, after 110 conditioning. IC501 is a 28-pin black monster Select lines from fiC

TELEVISION May 2002 405 converter chip IC452 via an op-amp Table 2: Line output stage tuning. in IC551. While the line oscillator's frequency is set by the H-rate Frequency FETs on Cs added Added capacitance pulses, the timing of the start of the scan, following the arrival of an H- Up to 33.5kHz Q511-4 C521-4 2-18pF rate pulse, is set by the H-phase 33-5-371 kHz 0512-3 C522-3 1.21pF voltage. This is how the video 37-1-40.5kHz 0512/4 C522/4 0.97pF image appears to be advanced or 40-5-44kHz Q513-4 C523-4 0.54pF delayed with respect to the start of 44-49.3kHz 0513 C523 0.39pF the lines. It is not the case that the 54.5-61.5kHz 0514 C524 0.15pF video image timing is controlled Above 61.5kHz None None None after the lines begin. A crucial difference for anyone new to this trade. The 12V supply for the horizontal-scan section of IC501 is IC451 (74LS221, a monostable These are shown in Fig. 2 as two fed to pin 23, via L501, with multivibrator) on the DEFL-SUB banks of four, R490-R497 and smoothing by C507. The line PCB. R460-R467. The pairs used are oscillator output at pin 26 is fed to Height is adjusted by a DC control selected by pins 9 and 10 of IC450, the line driver circuit (Q506) and voltage applied to pin 9 from pins which are connected to the the EHT driver circuit (Q611). 5/6 of IC452, via pins 6 of J7A1 microcontroller chip. This linearity R504 (241Q) and C504/6 and J5A4. Vertical linearity adjustment depends on the PC (1,000pF, 220pF) set the line compensation is required over the signal mode and is not user or oscillator frequency. The charging scanning frequency range 50- factory adjustable. time of the capacitors in this 130Hz. To this end the 0.33µF network is determined by the ramp charging capacitors C404/5 Line generator voltage fed to R546. Altering this are connected to the MC14052 Fig. 3 shows the line generator enables the line frequency to be dual, four-channel analogue arrangement. H-rate (sync) pulses changed when the user switches to multiplexer chip IC450 on the arrive at pin 16 of IC501 while an an application with a different scan DEFL-SUB PCB. Its outputs are H-phase DC control voltage is fed rate. connected to pins 10 and 11 of to pin 17. The H-phase voltage We'll take a peek at what's IC501 via close-tolerance resistors. comes from pin 7 of the DA present at the input side of R546,

R548 C575 47k 100p From LOPT pin 10

C513 I in. C510 C576 y .0022 .001 100p .. 0515 ard From IC301 R502 I C514 blanking cct On PWB.; SYNC J5A5.3 100 1.500p D502 o 7 16

IC551

7 J5A5,4 Phase Sawtooth X-ray 25 shift gen prof IC452 R480 1 12k 0526 Line driver to 0506

H DC control L501 AFC 23 osc of H osc 12V frequency D609 C512 C507 509 EHT driver 1/2 IC501 1 to 0611 2205V 1,000 7 2 16V 7 50V R510 20 T 5k6 IC550 2.7 see Fig 4 C505 C506 C504 .001 1220p 7 .1 C542

R546 = 2`; 20 R504 ,:>j5A5 5 ,\AA.,__ 470_• 24k W e

R506 100k 15 13 0 • Sawtooth C510 22 IC707 4 7 R511 IC502 R507 150k - 0 0 14 Wv 3 1 J5A5.2 25V 82k IC708 We 12 R508 220k _ no OL Wa 1-8 Parabola R509 47k 11

C503 2.200p From pC 7 5437549 754 7C546 PWB-DEFL Main PCB .001 .0022 0047 470p SUB .1. Fig. 3: The basic line generator circuitry. „T„

-10() May 2002 TELEVISION 47 see Fig. 4. This circuitry is centred 24V on the NJM2904 chip IC550, which C550 330 contains a couple of op-amps. The R5F2 VR550 50V Fig. 4. The bias and 20k VR551 associated bias and gain controls gain circuitry that sets VR550 and VR551 adjust the DC Bias 100k 5k Gain1 8k2 the required line oscil- 18k control voltage provided by the lator frequency.

DAC chip IC452, at pin 19, to suit 2,200p

the line oscillator's time-constant 47k 6 - 11-• circuit. One reason for mentioning From 88k IC452 10k this arrangement is that VR550 and pin 19 VR551 are considered to be fair 7 ,To R546 via J5A5 game by pot twiddlers. You need to I R5F2 10k know how to adjust them correctly, 1/2 IC550 see later. 001 mu 001 Image geometry 10k adjustment IC550 NJM2904 7 Returning to Fig. 3, the signal fed to C510 (4.7 e) has frame-rate sawtooth and parabolic correction. Fig. 5 deliberately The line driver and output components. It's coupled to pin 13 shows a rectangular raster and the stages of IC502 and pin 20 (AFC) of adjusted image contained within the The basic line driver and output IC501, but the effect is on the AFC raster. stage circuitry is shown in Fig. 7. only. IC502 is another MCI 4052 The correction waveforms come The output from the line oscillator, dual, four-channel analogue from pins 24 and 1 of the DAC8840 at pin 26 of IC501, is fed to the multplexer chip, of which only half chip IC708 and are combined by an base of the emitter-follower Q506 is used (pins 1-8 are connected to op-amp in IC707 (C4082). The and then to the gate of the 2SK358 chassis). Output pin 13 is connected amplitude of the two components is FET driver transistor Q508, whose to one of the input pins 11, 12, 14 controlled independently, in fact drain is connected to the driver or 15 depending on the data from each can be inverted, by the DAC. transformer 1501. The 2SC3688 the microcontroller chip at pins 9 This is done via the microcontroller line output transistor Q591 is and 10. Within the frequency chip while in the factory mode. mounted on its own PCB, above the ranges listed below, the Sadly the waveforms are difficult to main chassis, with the 39Q resistor microcontroller connects the AFC reach with a scope probe, but it's R521 across its base-emitter input to the junction of one of the well worth checking the combined junction. Hence meter tests require following RC networks: waveform at C510 on the main Q591 to be desoldered rather than PCB. just unplugged at J510 on the main Frequency RC network The amplitude of the signal at pin PCB. D508/9/10 provide efficiency 20 of IC501 determines the time diode action. Up to 40.5kHz C545/R508 difference between the start of the The conventional EW modulator 40.5-49.3kHz C549/R507 scan and the display of active diode is not present between the 49.3-59.7kHz C543/R506 video. The higher the voltage at anode of the efficiency diodes and 59.7kHz upwards C546/R509 C510, the earlier the scan starts in chassis. Instead, raster correction relation to the video (or, if you for pincushion and keystone Each RC network forms a low- wish, the later the video appears to distortion is applied to the gate of pass filter between pins 21 and 20 be displayed). Q501 (IRF9620), which is of 1050 I, with C503 to remove the connected in series with the supply line-frequency element at pin 20. Width control to the LOPT. Its gate is pulse-width The overall network comprises a The DC voltage at pin 19 of IC452, modulated by a complex parabolic range-dependent AFC switch. used to set the line oscillator waveform from the DEFL-SUB The idea of applying frame-rate frequency, clearly varies with this

waveforms to pin 20 is to tweak the frequency. It has another role to Edge of tube face line oscillator dynamically during play however, see Fig. 6. Via R480, the course of each frame. That is, Q526, Q502 and Q504 it controls during the course of each frame the supply to the line driver Keystone balance Keystone balance +ve button -ve button period the line oscillator's transformer T501. This optimises frequency is adjusted very slightly the line output transistor's base and the time at which the scan starts current, and maintains correct is delayed or advanced in relation to impedance matching between the Edge of raster Edge of video image the timing of the video information. line driver and output stages (The action of the phase-shift throughout the line-frequency circuit on the AFC has a similar range. effect on the line oscillator, only the You'll see that Q503 and Q505

conditions are in this case static act in the same way, via Q504. But Pincushion balance Pincushion balance until the user presses a button.) these two transistors are used to .ve button -ve button

The results of this dynamic image apply width control, which is Line timing adjusted geometry adjustment on the screen derived from pin 8 of IC452. Note to make video appe /E Line scanning to arrive earlier are shown in Fig. 5. They are that display width is set by the not aftected later referred to as keystone and variable supply, 40-160V, fed to the pincushion balance. Note, once line output transformer: the control again, that the video appears via T501 minimises the power loss Fig. 5: Results of dynamic image geometry adjustment. shifted in the raster: this is not scan in the line output transistor Q591.

TELEVISION May 2002 PCB. Q501 acts as a series current winding that feeds the rectifier regulator that modulates the supply diode D519. This supply is (9) Check for sync lock with as to the line output stage during the stabilised by IC503, zener diodes many signals as you can. course of each frame scan. Note D520/1/2 and Q516 then applied to that, unlike the pincushion/keystone the blanking pulse chip IC305 on (10) For the following, apply only balance adjustment carried out by the sync PCB (see Fig. 1 in Part 1). an H-sync signal, with no V-sync or image timing at the line oscillator, video. Make up a special lead and this is real raster correction. The Feedback switch box from spares. supply to the line output stage, Pin 5 of the LOPT feeds rectifier applied to Q501's source, varies D518, via the 1.2Q fusible resistor (11) Apply a MAC II signal at between 40-160V depending on the R535. The voltage developed 351cHz for H sync. width and mode of the display. See across C533 (22g) is potted down the Part 3 for more detail about this. and fed back to the power supply (12) Adjust the user controls for via Q519 and Q520 to regulate its maximum width. Tuning 40-160V output. Twiddlers are also As usual, the line output stage is inclined to have a go at VR504 in (13) Apply a 64kHz H-sync signal tuned. This is less complicated than Q519's base circuit. Correct and set the raster (not video) to it at first looks, when you adjustment is described below. measure 300mm wide (± 4mm) by appreciate that the tuning capacitors In the event of line collapse the adjusting VR504, which is on the C251/2/3/4 are connected in circuit voltage across C533 falls, Q517 main PCB near pin 28 of IC501. only as required, when the switches off, Q518 conducts and, associated FET(s) Q511/2/3/4 is/are via D529, shorts out the drain of (14) Connect the DVM to TP-H- switched on by the rnicrocontroller. Q611. The EHT drive then shuts DRIVE, near the scan-coil plug, The capacitors switched into circuit down and stays in this state until and adjust VR501 for a minimum to cover the various frequency power is switched off. reading. ranges as shown in Table 2. If the power supply or line output I'm not sure what happens stage has gone mad and is (15) This ensures correct line-drive between 49-3kHz and 54.51cHz, and producing excess voltages, this current and level of feedback to don't have a signal to test such a condition is detected at R535. IC955 for the chopper FET to condition! Above 61.5kHz there are There's a link from here via D526 provide the variable +B supply. only the permanently-in-circuit to pin 10 (overvoltage) of IC955 in tuning capacitors C525/6 and the power supply. More on this in W orkshop experiences C583/4 to provide tuning: they have Part 3. I've had the following problems a total value of 0-48µF. From this that were caused by the you can see that as the line Setting up STK79905B chip IC501. (1) frame frequency increases the tuning Here's a basic setting-up procedure, collapse. (2) Flickering frame drive. capacitance value decreases. as outlined in the service manual. (3) Very cramped frame scanning Above 44kHz the microcontroller Go through it only if you are certain in the lower half of the screen, with chip switches Q510 on, closing that the monitor has been twiddled. widely-spaced, erratic jumpy lines relay RY501. L506 (68µH) is then above. The chip may have been connected in parallel with the (1) Check for 168V across C956 in dry-jointed internally, as tapping polarised coil L505 to provide line the power supply, with a 31.5kHz while cold seemed to have some linearity compensation. signal applied. Adjust VR951 if effect on the display. (4) R408 was necessary. found to be open-circuit when Auxiliary supplies IC501 had failed. (5) I once found Don't expect to find a 6.3V CRT (2) Set VR550 and VR551 to mid that the line oscillator wouldn't synchronise. Otherwise, the line Fig. 6: Control of winding on the LOPT or EHT position. the supply to transformer in a multisync monitor. generator section of IC501 is the line driver However the LOPT in this monitor (3) Place toggle switch SW951 in excellent. transformer does provide a —100V supply for its centre position (his enables the I did have one wild goosechase, T501. the CRT's grids from a secondary line oscillator to run free without which is always much harder when sync lock-up). you don't have a circuit diagram. 024V The complaint was excessive width: R517 (4) Connect a frequency-counter the front controls had no effect. Ir 100 0503 470 Width control probe to the red scan coil wire and fact I had two of these monitors from 1W IC452 pin 8 © 0504 apply a 40kHz signal to the monitor with the fault, both at the same 25D2012 (the nearest I can find with my time. Most unusual, since the line 1.)503. graphics card is 640 x 480 at 75Hz, timebase is usually very reliable. which produces 381cHz). Fortunately I had a working monitor with which to make C518 220 (5) Adjust VR550 for 40kHz comparisons. 50V 0-21cHz. A check on the voltage at pin 9 of J7A2 (the edge connector on the 12V (6) Apply a 64kHz signal to the PWB-DEFL-SUB module) in the R524 R525 monitor (1,152 x 864 at 70Hz gives first faulty monitor confirmed that 10W 10 it varied between about 0.2-8V via 1 1W 64kHz). Adjust VR551 for 64kHz VR501 0.2kHz. the DAC when the width-control 5k buttons were pressed. This voltage From IC452 100 (7) Repeat steps 4, 5 and 6. is passed to pin 9 of the green pin 19 470 Primary winding of 1501 (pin 8) hybrid chip IC955 in the power (8) Flip the toggle switch back supply, via R965. IC955 in turn towards the CRT neck. controls, by means of pulse-width

408 May 2002 TELEVISION Supply from R524/5 0 12V

C513/C575

0591 Drain of 0611 4k7 0518 Œ1M 1501 1 5 2SC3688 10 2SC2274 14 56k 1 01 D529 Line collapse 3W 1502 protection 12V D528 Line drive 1 5 HZ12-C3 from 1=I C580 IC501 pin 26 3W in 220 IC955 25V 10 D507 C5811 C519 C520 Overvoltage protection

560 2SK358 D518 24V R535 o 5 1.2.> ERA82

4k7 Scan coils fusible rrrYN Feedback L507 to C533_1_ IC955 22 VR504 f fl pin 8 50V 2k 120p 56 3W

I D511 470 3W 68 P L506 VR502 0520 100 X . Y KSA708 H scan from shift

power supply y 0 RY501 12V 0.1 Pincushion drive , mn from J5A5 pin 8 0501 ii IRF9820 D519 Line Imeanly control —100V 01 100k RU2B from pC 1.2 supply to 0510 IC305 D505/6 pin 14 SI 0516 HZ11B3 2SA1207 40 - 100V feed from 0952 ein C524 at C523 C5211 0511 - 0514 0.15 0.39 0.82 IRF634 0514 0513 0512 0511

C525, C526 C583. C584 Selected by all 012 D520 - 2 pC HZ33 - 2

Fig. 7: Basic line driver and output stage circuitry.

modulation, the output from the +B I found some noisy-looking traces Next month regulator FET Q952 (IRF9620) at pins 6, 7, 8 and 10 of IC955. Pins In Part 3 I'll concentrate on the depending on the type of PC signal 6 and 7 are connected to an RC EHT and power supply sections of present or the user's H-size setting. network only, so attention was the monitor, with notes on the most Comparison with the conditions in turned to pins 8 and 10. Pin 10 is common causes of tripping. the working monitor seemed the for overvoltage protection, the feed best way of establishing what was coming from pin 5 of the LOPT. wrong. Suspecting a fault in the line output In the VGA mode the output from stage, I checked the voltage at the Q952 (at its drain) in the working cathode of D518, which is also fed monitor was 66V. In the faulty from pin 5 of the LOPT, and monitor it was 86V. This is the obtained a reading of 32V in the Corrections to Part 1 input to Q501 (EW correction working monitor and 20V in the (1) In paragraph 2, page 330, the FET), which feeds the line output faulty one. This was a bit of a vertical refresh rates should have transformer. Checks on the mark- surprise, as one might have been given as 50-130Hz (not 30- space ratio of the drive output at pin expected the excessive line 64Hz). See top of column 2. 12 of IC955 to Q952 showed that in timebase activity in the faulty the faulty monitor it had a long 'on' monitor to produce an increased (2) On page 332, in column 3, time, hence the high output from voltage. A check on D518's "Other outputs from IC305 are.. Q952. It seemed that IC955 was reservoir capacitor C533 (22g, ." should have read "Other inputs working, though mysterious green 50V) in the faulty monitor showed to IC305 are . .." This is 27 lines things should never be trusted! So that its value had fallen to 10µF. down from the top of the column. where was the cause of the trouble? Replacement of this component It seemed a chicken-and egg cured the fault in both the defective situation. monitors. A strange coincidence.

TELEVISION May 2002 409 John Coombes on how to tackle the various faults you could get with this VCR HM11E1645 fa U 11-11 nu "rn g guide

. his is one of a group of popular the cassette check that the reel spools up and down in the cassette housing, VCRs, introduced in about 1996, (supply item 248, take-up item 250) are replace the pulley (part no. KX11443) and that incorporate the US rotating correctly. The spools should be gear (part no. KF10551) in the clutch .1mechanism. In the following run lightly lubricated. If not friction can, over a pulley assembly down on fault conditions you could period of time, result in elongated holes. encounter I'll start with mechanical The spools then slow down and stick, with Diagnostic fault finding problems. the result that the tape drags or spills out This VCR produces diagnostic malfunction over the drive mechanism. codes in the LC display as an aid to fault Mechanical faults If these items are all in order, it may be finding. To display the fault code, press the The most common cause of chewed tapes worth checking through the tape path to channel down button with the power is a worn pinch roller. In some cases the ensure that there are no sticky patches on turned off and hold it. The code is bearing may warp or be distorted: the the guide poles, the audio/control head or displayed as long as the button is held. incorrect balance causes tape chewing. drum assembly. If the tape sticks it can be Various possibilities are as follows. If the pinch roller is OK, check the clutch damaged. pulley assembly — items 229 (pulley, part Tape damage can also be caused by If code 01 is displayed there's a problem no. KX11443) and 239 (gear, part no. incorrect operation of the brakes, item 254 with the front-loading (FL) mechanism. If KF10551) in the exploded view (bottom) in left and/or item 255 right. They can break the mechanism is jammed, check the unit the manual. Look for damage or broken or, very often, one of the lugs that holds for broken cogs or levers and ensure that it plastic retaining lugs. Problems here can the brake spring can crack. The spring then moves freely along the tracks. If the FL cause many different faults, including tape drops off and the brakes don't operate unit isn't jammed, check whether the looping during eject, which can be very correctly. capstan motor rotates. If it does there's a intermittent. There may be no take-up or Another cause of tape damage is when mechanism fault. drive in the play mode. No fast the VCR timing is badly out because the If the capstan motor doesn't rotate, check forward/rewind can be the result when the mode switch (S2101) is faulty. Check by the FG output from the motor. This is fed pulley has broken. cleaning or by replacement. to pin 40 of the HD6433977SB54 If these items are all OK, check the If the VCR sometimes tries to load microcontroller chip IC901 via pin 5 of operation of the capstan motor. You may without a tape, or ejects immediately after PG001/PG601, C601 (2.2g, SOV) and have to remove the motor, dismantle the loading, replace the front-loading switch R636 (3.3kQ). Servo control from pins 25 flywheel spindle, clean and relubricate the (S2102). and 75 of IC901 is fed to the capstan motor fsahualftty abenda brienagr icnagn, rceaausssee mtabplee and set up. A A problem I've come across on a number via pin 1 of PG601/PG001. Checks here of occasions is an intermittent corrugated should show whether the motor or IC901 is looping/creasing at the top and bottom. If effect on the playback picture, with a loud at fault. the bearing is badly contaminated the whine or squeal. It can also occur in the capstan motor may have to be replaced, record mode, with the symptom being If code 16 (servo fault) is displayed, because the hole in the bearing has become recorded. Very often the cause is a check for 5V at pin 41 of IC901 with the oval. In this event, even if the tape drive is vibrating sleeve on one of the guide poles. power on. If the supply is present, replace OK after cleaning, the sound can suffer Another cause is a faulty back-tension arm IC901. If the 5V supply is missing, check from wow and flutter, with poor music. (part no. 10{11531). the M5278L05 5V regulator IC905 which In some cases there may be no tape If the VCR powers down intermittently, should have 9V at its input and 5V at its damage but the VCR makes a groaning check the capstan motor. It may be output. noise in playback, record, fast forward or possible to cure this by dismantling, rewind. This also requires the capstan cleaning and relubricating the motor. If If code 04 (reel lock) is displayed and motor bearing to be cleaned and the not, check the motor by replacement. the capstan motor rotates, does the supply spindle set up. Follow with a soak test. In a few rare cases there has been no reset reel turn in reverse? The reverse signal If there is very intermittent tape chewing pulse to the rnicrocontroller IC, with the comes from pin 60 of IC901 and is or looping check the two small moulded voltage on the B5V line low at 4-6V. The supplied to the capstan motor via pin 7 of pins, which secure the clutch unit, on the cause has been heavy electrical leakage in PG601/PG001. If pin 60 is high, check for shaft. the capstan motor, which must be replaced. a mechanical fault — the gears and drive If the tape is not being wound back into If the VCR can't thread the tape or lift it belt. If pin 60 is not high, replace IC901. If the supply reel is OK, check whether Electronic faults chip IC1802 (NJM4558M) could be faulty. the take-up reel rotates during playback. If If there are no outputs from the power If the display is poor or doesn't function, it doesn't, check for a mechanical fault. If supply, check whether the 1.6A mains check the BU9716K LCD driver chip it does rotate, check for pulses at the base fuse F851 is open-circuit. If it is, check the IC1701. If only part of the segments show, of Q2104 (DTC144K) on the mechanism SIWBA60 mains bridge rectifier D851 for check the display (LCD1701) by sensor board. No pulses here suggests that shorts and, if necessary, the FS3KM-18A replacement. IC1701 receives inputs from the SG236 take-up reel sensor chip IC2101 chopper MOSFET Q851. If Q851 has pins 98, 99 and 100 of IC901: if necessary is faulty. If Q2104 is receiving pulses, failed R856 (0.33Q, 1W) which is in check that these outputs are present. check whether they arrive at pin 88 of series with its source will probably be If there is loss of information to the IC901. If not, suspect Q2104 and its open-circuit. On rare occasions shorted microcontroller IC901, the ST24CO2 associated components. If they do, check turns in the chopper transformer T851 are EEPROM chip IC903 is suspect. Before IC901 by replacement. the cause of F851 being open-circuit. If replacing it, confirm that the 5-1V supply The SG237 supply reel sensor feeds F851 is OK, check whether circuit at pin 8 is present and correct. It comes pulses to Q2103 (DTC144K). These protector QF851 (ICP-N38, 1.5A) is open- from D861 in the power supply. should arrive at pin 89 of IC901. Carry circuit. If remote control doesn't operate though out the same checks to ensure correct If the VCR works but there are no E-E the handset is providing an IR output, operation in this path. pictures the 33V tuning supply is missing. check for dry-jointed or high-resistance The main suspects are the HZS30-3 zener connections at the TFMS5380B IR If code 07 is displayed there's a loading diode ZD2501 which could be short- receiver IR1701. Its output at pin 1 is fed problem. The loading motor could be faulty, circuit or Q2506 (2SA844CD) which via pin 5 of PG1703/PG703 to pin 82 of but the first thing to check is the 12V supply could be open-circuit or leaky. IC901, which could also be dry-jointed. at pins 7 and 8 of the BA6209 loading Loss or intermittent loss of colour is very Alternatively either device could be faulty. motor drive chip IC904. If this supply is often caused by IC201 (HA118203F), but If the handset is the cause of the missing, check whether R976 (2-2S1 fusible) check for dry-joints first. Another cause is problem, check for poor battery is open-circuit or C914 (33µF, 25V) is the 4-43MHz crystal X202, which could connections - make sure that there are no short-circuit. IC904 provides drive outputs also be dry-jointed. dry-joints at the connector. If necessary at pins 2 and 10 - there should be 0-6V at If there is no sound, distorted sound or check for dry-joints at the LED and the these pins. If IC904 is providing drive crackles on sound, check for dry-joints at crystal. Sometimes the legs on the crystal outputs the motor is suspect. If there is loss the SAA7283GP Nicam decoder chip break off, giving loss of operation. The of the outputs replace IC904. If tape loading IC1810 and if necessary replace the chip. If handset may have been damaged by being or unloading is intermittent, check for dry- there is only one channel, left or right, with dropped etc. In many cases such damage joints at the pins of IC904. Nicam sound, IC1810 or the dual op-amp is beyond economic repair. 10

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1he T(80 ND has been designed to aid the installation of analogue and digital satellite systems This high the pack is new and unused and can be broken open quite easily £7.46+vat = £8.77 quality meter has video and audio output via part socket on rear and yideo only via BNC socket on front panel ;WI The built in speaker delivers demodulated audio from any analogue satellite signals Please add 1 66 + vat = £1.95 postage & packing per order JPG ELECTRONICS lull catalogue of COASTAL AERIAL SUPPLIES Sole ,rnpol meters available, Distributors Shaws Row, Old Road, Chesterfield. S40 2RB please phone for Unit 02, Rudford Industrial Estate, Food, Arundel 13N18 080 Tel 01246 211202 Fax 01246 550959 Mastercard/Visa/Switch details Telephone: 01903 723726 Fait 01903 725322 Mobile 0976 241505 Callers welcome 9:30 a.m .to 5:30 p.m. Monday to Saturday

TELEVISION May 2002 Toshiba service briefs

Models VTVI402B and VTV14025 A common cause of the dead set symptom is failure of the 2SD2627LS line output transistor Q406, which goes short-circuit. The part no. is BZ510036. To prevent further failure, the two 1,000pF, 500V capacitors C417 and C438 should also be replaced. Suitable replacements are supplied with Q406 when this is ordered from Toshiba. Fig. 1 shows the positions of these components.

Models 32M W7DB and 40 WHO8B I here have been complaints that the picture brightness fluctuates when objects in the foreground move, for example the brightness of the map in the background fluctuates when the weatherman moves his arm. An improvement can be obtained by changing some data values in the receiver's design mode: this reduces the action of the black-extender circuit. Note that data should not normally be changed in the design mode, as some changes can result in a non-working set. So special Fig. 1: Positions of 0406, C417 and C438 in the Toshiba Models care is required. VTV14028 and VTV1402S. To enter the design mode, first enter the service mode as follows. Press the remote-control unit's mute button, then press it again and hold. While holding it down, press the menu key on the set's front Data name New setting panel. The letter S should appear at the top-right corner of the screen and RCUT at the top-left corner. You are then in the service BS2 07 mode. 2BS2 07 To enter the design mode, press and hold the remote-control 3BS2 07 unit's call button, then press the menu key on the TV set's front NBS2 07 panel. The S at the top-right corner of the screen should change to WBS2 07 D. You are now in the design mode. Use the channel-up and channel-down keys to select the data name required, and the volume-up and volume-down keys to change the data. To store new settings, switch the set to standby then on again. 1 The above information is from the Toshiba Technical The data settings to change to deal with the brightness Bulletin AH85. fluctuation problem with these sets are as follows:

Make sure of your copy of Television

It can be difficult finding a copy of Television at local newsagents. The number of magazines being published keeps increasing, which means that newsagents have less shelf space for the display of individual titles. Specialist magazines in particular get crowded out.

There's a solution to the problem. Most newsagents provide "shop-save" and/or home-delivery services. There's no charge for a shop save. You simply ask your newsagent to order a copy for you: it will be kept on one side each month ready for you to collect. Home-delivered copies are ordered in the same way, but generally incur a delivery charge.

A newsagent can order any magazine for you, whether or not the shop normally stocks it. If you buy your copies of Television from a newsagent and want to make sure you get every issue, just ask at the counter.

May 2002 TELEVISION I I 2 The following list gives spares department addresses and telephone numbers or, where these are the same, service department or head office addresses and telephone numbers. Also included are details of various spares distributors. Stocks of spares may no longer be available for defunct brands. TV/VCR SPARES GUIDE 2002

Aiwa Tel 01282 683 000 See also CPC. Wharfedale Road, Winnersh Tel 0870 1699 602 Fax 01282 683 010. Triangle, Wokingham, Berks Spares & fax 0870 1699 603. e-mail: [email protected] Cathay Spores available from RG41 5TP. email: Diamond Television. Tel 01189 252 500 [email protected] Autovox See Comet Group plc. Fax 01189 256 774. See also CPC, KSA Wholesale Comet Group plc., After Sales, Note: Daewoo brand products Components, SEME and Willow Beko (UK) Ltd., Beko House, PO Box 92, Preston PR2 9GY. only, not OEM products. For the Vale. 36/38 Caxton Way, Watford Tel 08706 052 020 latter, refer to the original Business Park, Watford, Hens Fax 01772 664 835. distributor. Account holders only. Akai Spares from Prima WD1 8QZ. e.mail:[email protected] See also CPC and SEME. International, Prima House, 4 Tel 01923 818 121 Elland Road Industrial Park, Elland Fax 01923 819 652/3. CPC Plc., Component House, Decca See Tatung (UK) Ltd., CPC Way, Leeds 1511 OEY. e.mail:[email protected] Faraday Drive, Fulwood, and Wizard Distributors. Spares for Tel 0113 251 1500 See also SEME. Preston, Lancs PR2 9PP. chassis up to and including the Fax 0113 251 1535. Tel 01772 654 455 110/115 series available from D&S email: Beovision/Beocord Bang and Fax 01772 654 466. Electronic Services, Building 15, Unit akaispares@prima- Olufsen UK Ltd., Unit 630, e.mail:[email protected] Stanmore Industrial Estate, international.com Wharfdale Road, Winnersh, Authorised spares distributor for Bridgnorth, Salop WV15 5HR. See also CPC, Chas Hyde and Wokingham, Berks RG415TP. Akura, Aiwa, Alba, Amstrad, Tel 01746 766 641 Wizard. Tel 0118 969 2288 Bush, Citizen, Epson, Ferguson, Fax 01746 766 641. Fax 0118 969 3388. Fidelity, Goodmans, Grundig, Akura See CPC, also lain Hinari, Ingersoll, LG, Logik, Denon Spares available From Stewart. Binatone Telecom plc., Unit 1, Matsui, Orion, Pace, Panasonic, Hayden Laboratories Ltd., Hayden Ponders End Industrial Estate, East Philips, Pye, Saisho, Samsung, House, Chiltern Hill, Chalfont St Alba Radio Ltd., 12 Thames Duck, Lees Lane, Enfield EN3 7SP. Sharp, Sony, Thompson, Toshiba Peter, Gerrards Cross, Bucks 519 Road, Barking, Essex IGII OHZ. Tel 01325 304473 and Triumph. 9UG. Spares for Alba, Bush, Roadstar Fax 01325 304498 Compatible spares available for Tel 01753 888 447 and some Goodmans and Hinari Trade only. Akai, Baird, Bang and Olufsen, Fax 01753 880 019. models. Some Brother microwave, Beko, Blaupunkt, Brandt, BT, e.mail:[email protected] Dirt Devil and Power Devil spares. BPL Spares for TV sets made in Cambridge, Canon, Casio, Tel 020 8787 3000 India available from Falmouth Hi Crown, Daewoo, Decca, Dual, Diamond Television, Fax 020 8787 3110. Fi, 14 Market Strand, Falmouth, Finlux, Fisher, Fujitsu, Funai, GEC, 15/15a Rodbourne Road, See also CPC, SEME, Willow Cornwall TR 1 1 3DE. Granada, Hantrex, Hitachi, ITT, Rodbourne, Swindon, SN2 2AG. Vale, and Wizard. Spares also available for Crown, JVC, Loewe, Luxor, Marantz, Spares for Cathay and Venturer Dansai, Datsurai, Kuro and Zenor Maspro, Memorex, Mitsubishi, products. Murphy TVs with model Ambassador Brand name used Tel 01326 313 412 NEC, Nikkai, Nokia, Normende, numbers starting CTV, the Murphy by Sentra Electronics. email [email protected] Pioneer, Praline, Questar, VCR7101, Sansui SV77 VCR and Rediffusion, Roadstar, Saba, Osaki VCR31/2/3 plus Amstrad Spares handled by Bush See Alba Radio Ltd. Also Sabra, Sansui, Sanyo, Schneider, mechanical parts for the VCR35 CPC. See also Willow Vale and CPC, SEME and Willow Vale. Sentra, Shintom, Siemens, Skantic, also spares for the Venturer audio Wizard. Solavox, Tashiko, Tatung, TEC, range. Cambridge Spares available Telefunken, Tensai and Thorn. Tel 01793 497 591 A.R.D. Electronics Plc., From CPC and SEME. Fax 01793 431 687. Warehouse and Distribution Crown Spares available From email: Centre, Canon Consumer Imagining Key Electronics. See also SEME. [email protected] Shorten Brook Way„ Service Centre, Unit 130 Made in India models see BPL. Altham Business Park Centennial Park, Elstree WD6 3SE Dual See Wizard Distributors Altham, Accrington, Tel 0870 241 2161 Daewoo Electronic Sales UK Lancashire BB5 5YL Fax 020 8731 4139 Ltd., Daewoo Building, 640 Dynatron Pre-1981 sets, see

TELEVISION May 2002 GEC Spares available from CPC, Charles Hyde & Son Ltd., Tel 0121 772 2834 HRS, and SEME. Prospect House, Barmby Road, Fax 0121 772 7487. Pocklington, Yorks Y042 4LZ. Authorised spares distributor for General See Fujitsu General. Tel 01759 303068 Aiwa, Kenwood, Philips, Philex, Fax 01759 303620. Pioneer, and Samsung. GenServe (GTS) Ltd., Web site: charleshyde.co.uk 11 Caen View, Rushy Platt, Sole authorised UK spares Kuro Made in India models see Swindon SN5 8W0. distributor for Akai, Hitachi, BPL. Tel 01793 886 332 Nokia, Sanyo, Teac, Tascam and Service 01793 886 333 Yamaha. Kyoshu Spares available from Spares 01793 886 322 Approved spares and accessories Key Electronics. Fax 01793 886 323. distributor for Alba/Bush, e.mail:[email protected] Thomson/Ferguson, JVC, LG Electronics UK Ltd., LG House, Goldstar, LG, Matsui, Philips, 264 Bath Road, Slough, Berks Sil GoldStar See LG Electronics UK Saisho and Sharp. 4DT. Philips Service; post-1981 sets, Ltd. Also A.R.D, CPC, Chas. Hyde The ASWO service partner for UK Tel 01753 500 400 spares from SEME. and SEME. and Ireland. Fax 01753 517 445. Extensive spares stocks available See also A.R.D. Electronics, CPC Elftone Electronics Ltd., 4 Goodmans See Alba Radio Ltd. For Mitsubishi, Samsung, Sony and Willow Vale. Beresford Avenue, Wembley, or Comet Group plc. depending and Toshiba. Middx HAO 1YZ. on model. Also CPC. Selected ranges of specific Uoytron Laltex Group, Laltex Tel 020 8902 6222 genuine and/or replace-ment House, Leigh Commerce Park, Fax 020 8903 5011. Gnmdig Spares available from pattern spares for Decca, Fidelity, Greenfold Way, Leigh, Lancashire email: [email protected] CPC and Willow Vale. Spares for Hinari, GEC, Grundig, Luxor, WN7 3XH. VCR4000 and SVR4004 ranges NordMende, Orion, Panasonic, Tel 01942 687 000 Etron Brand name used by available only from Willow Vale. Saba, Sabra, Sentra, and Tatung. Fax 01942 687 070. Nikkai Imports Ltd. Full range of semiconductors, Harwood Spares available from passive components, tripiers, Logik Brand name used by Eurosat Distribution Ltd, 5, Key Electronics. LOPTs and remote controls. Dixons. Spares available from Oxgate Centre, Oxgate Lane, Partmaster, CPC, HRS. London NW2 71A. Hinori Spares available From In Spares available from Tel 020 8452 6699 CPC, Chas Hyde and SEME. GenServe Ltd. See also CPC. Loewe Spares available from Fax 020 8452 6777. Wizard. www.eurosat.co.uk Hira The Hira Co., Ltd., Elizabeth JVC (UK) Ltd., JVC House, JVC House, 1 Elizabeth Street, Business Park, Priestley Way, Luxor Spares available From Expert. Sets use Tatung, GEC, or Manchester M8 811. Staples Corner, London NW2 GenServe Ltd., CPC, Chas Hyde Luxor chassis. Tel 01618 347 432 7BA. and Willow Vale. Fax 01618 324 566. Tel 020 8450 3282 Ferguson Spares available from Fax 020 8452 2534. Manhattan Thomson Multimedia Sales UK Hitachi Sales (UK) Ltd., Account holders only. Eurosat Distribution Ltd., Oxgate Ltd., 30 Tower View, Kings Hill, Dukes Meadow, Millboard Road, See also CPC, Chas Hyde and Lane, London NW2 7JA. West Mailing, Kent ME19 4NO. Bourne End, Bucks SL8 5XF. Willow Vale. Tel 020 8452 6699 Tel 01732 520 920 Tel 01628 643 435 Fax 020 8452 6777. Fax 01732 520 995. Fax 01628 643 000. Kenwood Electronics UK Ltd., [email protected] www.hitachi.service Kenwood House, Dwight Road, Marantz Hi Fi UK Ltd., [email protected] See also Chas Hyde and Willow Watford, Herts WD1 8EB. Kingsbridge House, Padbury See also CPC, HRS, Chas Hyde, Vale. Tel 01923 816 444 Oaks, 575/583 Both Road, SEME, and Wizard. Fax 01923 819 131. Longford, Middx UB7 OEH. HMV Sets use Ferguson or See also KSA. Tel 01753 680 868 Fidelity Spares available from Fidelity chassis. Fax 01753 680 428. SEME, HRS, CPC, Wizard and Key Electronics Unit 5, Brow See also SEME and CPC. Willow Vale. HRS Electronics Ltd., Medco Mills Industrial Estate, Brighouse House, Connect Business Park, Road, Hipperholme, Halifax Matsui Brand name used by Finlux Spares available from Bordesley Green Road, HX3 8EF. Currys and Dixons. Spares GenServe Ltd. Birmingham, B9 4UA. Tel 01422 203676 available From Partmaster. Also Tel 0121 766 6668 Fax 01422 263224. CPC, Chas Hyde, SEME and Fisher Spares available From Public orderline Spares for Crown Corporation, Wizard. Sanyo UK Sales Ltd., Sanyo Tel 0121 766 5124 Harwood, Kyosho and House, Otterspool Way, Watford, Fax 0121 766 7274. Ssangyong products. Metz No UK source of spares. Herts. WD2 8JX. email: Manufacturers address: Metz Tel 01923 222 244 [email protected] Konica Plane Tree Crescent, Werke Gmbh 2 Co., D8510, Fax 01923 818 251. Wide range of video, audio and Feltham, Middx TW13 7HD. Furth, Germany. See also CPC and Chas Hyde. television spares for Fidelity, Tel 020 8751 6121 GEC, Hitachi, Nikkai, Pace, Fax 020 8755 0681. Mitsubishi Spares available Fujitsu General, Unit 150 Philips, Pye, Saisho, Sanyo, SEME, CPC, Willow Vale and Centennial Park, Centennial Sharp, Tatung, Toshiba and many Wining See SEME. Wizard. Avenue, Elstree, Herts WD6 3SG. more. Also all leading domestic Tel 020 8731 3450 appliance brand spares. KSA Wholesale Components, Morphy Richards Fax 020 8731 3451 582 Green Lane, Small Heath, Spares available from R and M e.mail: [email protected] Birmingham B9 50G. Technical Services.

414 May 2002 TELEVISION Available Now... « SI111 ,si— 1111si The NEW wwvv.charleshyde.co.uk

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Catalogue automatically receive S LI • ACCE IDRIES • C/M METIG PARTS If you would like S LI including the • INSTRUCTION ROOKS • INTERNAL PARTS Seme General Spares Catalogue LOOKING FOR A REPLACEMENT • ntmoTE CONTROLS please contact sales REMOTE CONTROL? and add to your next order. PLUS A FULL RANGE OF COPY PARTS Ljur sveD st.e fISt, S iuge range including manufacturer's originals, rze FREE CARRIAGE' on all M r orders of D Linekeen ançanaera can reguter for an °Mee account deectly 01664 484000 ' on our webete or by e-ened.no aeleelPcharlas.hyde co ula Wel generic copies and universal. £12.00 or more as well as NEIr r-min Pricing your detada Art you • Charles Hyde & Son account bolder, 'Applicable to Electronic orders only, exclu rom credit ono,. :ace, Log in today to find yours! account customers. 'Carnage rates exclude Seme Trade Supplies. Shop where the professionals shop > at competitive prices

Tel: 01664 484000 01759 303068 01759 303620 [email protected] Fax: 01664 563976 Cherie, Hyde a Bee Ltd. Berrnby Reed, Peckhneton, noes, Y042 HOP email: [email protected] Seme

FRUSTRATED! KSA Wholesale Components Looking for ICs TRANSISTORS HttpMwww.ksaelectrical.co.uk A phone call to us could get a result. We offer an extensive Alba power supply ka £11.50 range and with a World-wide \ - Goldstar frame output kit £4.75 database at our fingertips, we are able JVC field output kit £10.75 to source even more. We specialise in Matsui power supply kit £11.00 devices with the following prefix Mitsubishi power supply kit £5.75 (to name but a few). Panasonic field output kt £6.75

2N 2SA 2SB 2SC 2SD 2P 2Sj 2SK 3N 3SK 4N 6N 17 40 AD Sharp TV component kit £10.75 ADC AN AM AY BA BC BD BDT BDV BDW BDX BF Sky digital remote control + TV link eye £14.95 BFR BFS BFT BFW BFX BFY BLY BLX BS BR BRX BRY BS Sky digital TV link eye £6.75 BSS BSV BSW BSX BT I3TA BTB BRW BU BUK BUT BUV BUVV BUX BUY BUZ CA CD DX CXA DAC DG DM DS Amstrad tuner repair ka £3.95 DTA DTC GL GM HA HCF HD HEP ICL ICM IRF j KA Universal remote control (4 Devices) £7.95 KIA L LA LB LC LD LF LM M M5M MA MAB MAX MB MC MDAJ MJE MJF MM MN MPS MPSA MPSH MPSU Ferguson TV remote controls from £3.99 MRF NIM NE OM OP PA PAL PIC FN RC S SAA SAB Line output transformers from £7.95 SAD SAJ SAS SDA SG SI SL SN SO STA STK STR STRD STRM STRS SV1 T TA TAA TAG TBA TC TCA TDA TDB Scart to scart lead 1.5m 69p TEA TIC TIP TIPL TEA TL, TLC TM? TMS TPU U UA Digital LNB 0.6 £11.95 UAA UC UDN ULN UM UPA UPC UPD VN X XR Z ZN ZTX + many others BU508A 69p BUT11AF 45p Uc3842 49p TDA3654 79p We can also offer equivalents (at customers' risk). STK5333 £5.99 We also stock a full range of other electronic components. Mail, phone, Fax, Credit Card orders dr callers welcome. DVD's upgraded to multi-region. Car stereos decoded.

Connect Psx/psone/ps2 upgrades. Car stereo spares. Cricklewood Electronics Ltd Prices exclude VAT — carriage at cost. Credit cards accepted. 4042 Cricklewood Broadway, London NW2 3ET Tel: 020 8452 0161 Fax: 020 8208 1441 582 Green Lane, Small Heath, Birmingham B9 5QG w ww.cricklewoodelectronics.co.uk Tel: 0121 772 2834 Fax: 0121 772 7487 E-mail: [email protected]

TELEVISION May 2002 4 I 3 Partmaster Direct,P0 Box Fax 01952 293 459 (spares Spares telephone 1924 Sheffield S2 5XX only). Tel 01280 823 523 Tel 0870 909 0444 Also CPC, Chas Hyde, KSA, Fax 01280 814 916. Fax 0870 909 0333 Willow Vale and Wizard. www.partmasdter.co.uk Agents in N. Ireland Don Berg Sentra Post-1991 spares email: [email protected] Elec tronics Ltd., School Masters available from Alba. Spares for Dixons/Currys ranges House, Ranafast, Co Donegal, See also SEME, CPC and - Matsui, Link, Logik, Prinz, Eire. Wizard. Saisho. Also Sanyo. Tel 00 353 754 8275 Fax 00 353 757 1031. Sharp Spares available from Philips Service Centre, 420/430 A.R.D. Electronics, Willow Vale, London Road, Croydon CR9 4QX. Sansui Spares available from CPC, HRS, SEME and Wizard. Tel 020 8686 5414 CPC, or Diamond Television for Fax 020 8681 0796. VCR Model SV77. Siemens Spares available from email: Appliance Care Limited, Unit F4, Murphy Spares available from [email protected] Sanyo UK Sales Ltd., Sanyo Ballymount Drive, Ballymount Diamond Television for TV sets Account holders only supplied. House, Otterspool Way,Watford, Road Industrial Estate, beginning with CTV and VCR See also CPC, HRS, Chas Hyde, Herts WD2 8JF. Walkinstown, Dublin 12. 7101. Some sets fitted with KSA, Willow Vale and Wizard. Tel 01923 222 244 Tel 00353 145 02655 Fidelity chassis. Older sets fitted Fax 01923 818 251. Fax 00353145 02520. with Rediffusion chassis. Earlier Pioneer (GB) Ltd., Pioneer See also Chas Hyde, and sets fitted with Rank chassis. House, Hollybush Hill, Stoke Partmaster. Skantic Spares available from Poges, Slough SL2 4QP. GenServe Ltd. and CPC. NCS See GenServe (GIS) Ltd. Tel 01753 789 876 Schneider Spares available from Fax 01753 789 534. Wizard and CPC. Solavox Brand name used by NEC Spares available from SEME Account Holders only. Comet Group plc. See also CPC. and CPC. See also CPC, KSA and SEME. Soloco See SEME. Sony UK Ltd., Spares Division, NEI See Stewart (lain) and SEME. Prinz Brand name used by SEME Ltd., Hudson Road, PO Box 58, Newbury, Berks Dixons. See Partmaster. Melton Mowbray, Leics RG I 3 9LQ. NikIcal Spares available From LE131BS. Tel 01635 861 133 CPC, HRS, Stewart (lain) and Praline Brand name used by Sales Hotline 01664 484 000 Fax 01635 874 099. Wizard. Comet Group plc. Fax 01664 563 976. Account holders only. See also email: [email protected] CPC, Chas Hyde, Willow Vale Nokia Spares available from Pye See Philips Service. Also Web: www.seme.co.uk and Wizard. GenServe Ltd. and Chas Hyde. SEME. Internet catalogue: www.seme.co.uk/solo Ssangyong Spares available NordMende Spares available Quart see Denon, Hayden Lab. Sole authorised distributor for from Key Electronics. from Thomson Multimedia. See Mitsubishi and Toshiba. also SEME. Questar See CPC. Authorised spares distributor for Steepletone Products Ltd., AEG, Airflow, Alba, Aiwa, Park End Works, Croughton, Nr Orion See CPC and Chas Hyde. Roberts Radio Technical Baird, Beko, Bendix, Bissell, Brackley, Northants NN13 5RD. Services Bush, Crown, Credo, Cannon, Tel 01869 810 081 Osaki Brand name used by 97-99 Warton Road, Isleworth, Daewoo, Electrolux, Europart, Fax 01869 810 784. Rumbelows. Spares for models Middx T\A/7 6EG. Ferguson, Hotpoint, LG, VCR31/32/33, also mechanical Tel 0208 560 6644 Marantz, Matsui, NEC, Stewart (lain) parts for VCR35 available from Fax 020 82329739 NordMende, Osaki, Panasonic, 3 Royds Avenue, Linthwaite, Diamond Television. See also Helpline 020 8758 0338. Pace, Philips, Pioneer, Pye, Huddersfield HD7 5QU. SEME. email: [email protected] Parkinson Cowan, Saisho, Tel 01484 842 761 Spares for Roberts Radio and Sharp, Sony, Technics, Mobile 0777 307 0474. Pace Micro Technology plc, Morphy Richards models. Telefunken, Thomson, Tricity, Stockist for NEI and some Nikkai Victoria Road, Saltaire, Shipley, Thorn and Zanussi. spares, also spares for current West Yorkshire, BD18 3LF. Roadstor See Alba, CPC and Spares available for Akai, Akura models. Tel 01274 532 000 SEME. Akura, Amstrad, Bush, B&O, Fax 01274 537 128. Blaupunkt, Braun, Cambridge, Tandberg R.D.E. Tandberg, Spares also available from A.R.D. Saba Spares available from Crown, Dansai, Decca, Denon, Holly Tree House, The Green, Electronics, Eurosat, HRS, CPC CPC. Dynatron, Fidelity, Fisher, GEC, Full Sutton, York and Willow Vale. Finlandia, Finlux, Fujitsu, Funai, Y041 1HW. Saisho Brand name used by GEC, Goodmans, Graetz, Tel 01759 372 795. Panasonic (UK) Ltd., Panasonic Dixons. See Partmaster, CPC, Granada, Grundig, Hinari, House, Willoughby Road, HRS, Chas Hyde, SEME, Willow Hitachi, ITT, JVC, Jackson, Tatung (UK) Ltd., Service Bracknell, Berks Vale and Wizard. Kenwood, Kárting, Loewe, Logik, Division, Stafford Park 10, RG12 8FP. Luxor, Memorex, Murphy, NEI, Telford, Shropshire TF3 3AB. Tel 01344 860 133 Solaro Spares available from Nokia, Orion, Praline, Tel 01952 290 111 Fax 01344 861 598. GenServe Ltd. and CPC. Rediffusion, Roadstar, Saba, Fax 01952 292 096. Account holders only. Sabre, Sabra, Samsung, Sansui, Trade only. Non-dealer orders handled by Samsung Euro Service Centre, Schneider, SEG, Seleco, Sentra, Spares also available from CPC, SEME Ltd. Unit A, Stafford Park 12, Telford Sharp, Siemens, Solavox, Tashiko HRS and Willow Vale. Shropshire TF3 3B1 and Tatung. Tel 01952 207 171 For Panasonic and Pioneer

416 May 2002 TELEVISION

4 BOOKS TO BUY VIDEO AND well covered elsewhere: here the UNDERSTANDING AND emphasis is on the practical CAMCORDER SERVICING CD PLAYERS Dusiness of fault diagnosis and SERVICING AND epair. Engineers who need to achieve a TECHNOLOGY Price UK £35.00 EUR £37.00 better urderstanding of CD technology will find this book an Steve Seething This book provides fully up-to-date SERVICING AUDIO essential tool for fault diagnosis, coverage of the whole range of adjustment and repair. This book AND HI-FI EQUIPMENT current home video equipment, not only covers the mechanical analogue and digital. As well as .;ervice engineers and technicians design Eut also the integrated essential information for repair have come to regard this book as circuits within a CD player. It is SERVICING and trobleshooting, the author essential to their work. As a bench- written for immediate application provides clear explanations of the :.ide companion and guide it has and is well illustrated, so it AUDIO technology of video equipment, no equal. Its purpose is to ease and should become a welcome which will enable the service peed up the processes of fault addition to the rack of tools HI-FI engineer to gain a thorough diagnosis, repair and testing of all available to the service engineer. EQUIPMENT knowledge of the equipment with classes of home audio equipment: Ken Clements has extensive THIRD EDITION which they are working. ›eceivers, amplifiers, recorders and experierce of the service industry As well as traditional VCRs the playback machines. The mechanics both as a service manager and book includes the full range of and electronics of domestic audio later in technical training with video cameras designed for home are examined by Nick Beer in a Sony and Pioneer. It is his hands- use and editing systems, and the down-to-earth and practical way, on knowledge that makes the Nick Beer latest DVD and hard-disk concentrating on what goes wrong, book so valuable, not only as a equipment. low to track down problems, and wide-ranging reference but also READERSHIP: Service engineers, how to solve them. as a berchtop manual to be kept servicing students, advanced EADERSHIP: Service technicians within reach at all times when !e k e; electronics DIY. and engineers, audio engineers. working with CD players. Price UK £23.00 FUR £25.00 Price UK £35.00 EUR £37.00 Price UK £35.00 FUR £37.00 SERVICING 11“ Bar' eripq . SERVICING SATELLITE • ') SATELLITE a. ' Post your completed order form to:- VIDE O TV EQUIPMENT Jackie Lowe, Cumulus Business Media, Anne Boleyn EQUIPMENT This is the definitive practical guide EDITION to fault-finding, troubleshooting and House, 9-13 Ewell Road, Cheam, Surrey, SM3 8BI Ir F servicing satellite television Price includes delivery equipment, both indoors and outdoors. It will take you through all areas of satellite television How to pay Ewen. Trundle system servicing from the simplest fixed dish to fully motorised systems. From PAL to Mac to MPEG title all contemporary systems are covered. J I enclose a cheque/bank draft for £ READERSHIP: Service engineers, (payable to TELEVISION) SERVICING satellite equipment designers and SAIIILLITE manufacturers audio engineers. Price UK £35.00 EUR £37.00 Please charge my credit/charge card J Mastercard J American Express J Visa J Diners Club TV SERVICING TV EQUIPMENT Credit Card No: Expiry Date: SATELLITE AND VIDEO EQUIPMENT The first edition of this unique 'hands-on' fault-finding book Signature of Cardholder became the guide and mentor for thousands of service technicians Cardholder's statement address: (please use capitals) and engineers in many countries and was widely adopted as a college text. In its new and updated Name form its usefulness is enhanced by five new chapters, including fault Address diagnosis in digital TV and video equipment, satellite-receiver repair and interfacing/hookup. All the chapters have been based on many years of practical bench and field experience, the book wastes little space on theoretical principles Post Code Tel: and circuit description where it is Thorn brand equipment. Spares Willow Vale Electronics Ltd., Fax 0121 766 6100. available from Thorn UK Ltd., Connect Business Park, Bordesley email: [email protected] Glaisdale Drive, Bilborough, Green Road, Birmingham B9 4UA Official distributor for Antex, Nottingham NG8 4LA. Tel 0870 6000 271 Adcola, CME, K6nig, Nikkai, Tel 0115 900 7111 Fax 0870 6000 272. Philex and Thorn. Fax 0115 929 5899. E-mail [email protected] Web www.willowvale.co.uk Wizard Distributors, Empress Toshiba European Service Appointed spares distributor for Mill, Empress Street, Manchester Centre, Units 6/7 Admiralty JVC and Sharp. MI6 9EN. Way, Southern Trading Centre, Spares distributor for Alba, Tel 0161 872 5438 or Camberley, Surrey GUIS 3DT. Amstrad, Aiwa, Bush, Grundig, Tel 0161 848 0060 Tel 01276-694 000 Hitachi, LG, Mitsubishi, Pace, Fax 0161 873 7365 Fax 01276-600 521. Panasonic, Philips, Saisho, e-mail: www.toshibs-tuk.com Samsung, Sony, Tatung, [email protected] See also A.R.D. Electronics, CPC, Thomson, Toshiba, VDO Website: HRS, KSA, Chas Hyde, SEME, Mannisman (Philips car audio). www.wizard-distributors.co.uk Technics See Panasonic. Willow Vale and Wizard. Distributor for Altai, Antex, AWI, Spares stocked include Akai, Telefunlcen Spares available Classic, Electrotube, ERL, Hameg, Alba, Amstrad, Decca, Dual, from Thomson Multimedia (see Triad Brand name used by JBC Soldering Solutions, Kamasa, Ferguson, Fidelity, Hitachi, Loewe, Ferguson) CPC and SEME. Hinari Consumer Products Ltd. Labgear, MBO, Mercury Telecraft, Matsui, Mitsubishi, Nikkai, Philips, One for All, Philex, Portasol, Pye, Saisho, Samsung, Schneider, Teleton See Fujitsu General. Trio See Kenwood Electronics. Servisol, Treston, ill, Uniross, Sentra, Sharp, Sony, Tatung, Vogels, Wavetek, Weller, Wolsey Toshiba. Trade only. Texet Spares available from Triumph Brand name used by and many others. The Hira Co, Ltd. Currys. See Partmaster, CPC. Yamaha Wiltsgrove Ltd., 35-38 River Spares availble from Chas Hyde Thomson TV and VCR spares Venturer Audio spares vailable Street, Digbeth, Birmingham B5 available from Willow Vale. from Diamond Television. 5SA. Zenor Made in India models see Tel 0121 772 2733 BPL. General/miscellaneous parts suppliers

AV-Services CRTs only supplied LRC Videos 186 Croydon Road, Tel 01889 577 600 3-5 Whitfield Street, London Tel 020 8202 1919 Croydon CRO Fax 01889 575 600. WIT 2SA. Fax 020 8202 0015. Tel 020 8656 6006 Tel 020 7323 2107 email: [email protected] email: [email protected] Farnell Electronic Fax 020 7323 2191. Spares distributor for Ke5nig and Components, Canal Road, PV Tubes, 108 Abbey Street, Philex. Genuine spares for Leeds LS12 2TU Manor Supplies, Accrington, Lancs BB5 1EE. Ambersil, Beko, Mercury, Tel 0870 1200 200 9 Whitchurch Parade, Whitchurch Tel 01254 390 936 Mitsubishi, Philips and TDK. Fax 0870 1200 201 Lane, Edgware, Middx HA8 6LR. Fax 01254 872 166. Tel 020 8952 8808 Economic Devices, Grandata Ltd, Fax 020 8952 8809 RS Components, PO Box 99, The Coach House, Muxton Lane, KP House, Unit 15, Pop In Corby, Northants NN17 9RS. Telford, Shropshire Commercial Centre, Southway, Maplin Electronics, Freepost Tel 01536 201 201 Tel 01952 273130 Wembley, Middx HA9 OHB. NEA9433, Barnsley S73 OBR. Fax 01536 201 501. Fax 01952 405478 Tel 020 8900 2329 Tel 01226 751 155 email: [email protected] Fax 020 8903 6126. Fax 0870 264 6001. Sendz Components, e.mail:[email protected] E-mail: @maplin.co.uk 63 Bishopsteignton, Shoeburyness, East London Components, Website: www.maplin.co.uk Essex SS3 8AF. 63 Plashet Grove, East Ham, J.W. Hardy, Tel 01702 338 894 London E6 lAD. 231 Station Road, Stechford, MCES, 15 Lostock Road, Fax 01702 338 805. Tel 020 8472 4871 Birmingham B33 8BB. Davyhulme, Manchester M41 OES. Fax 020 8503 5926. Tel 0121 784 8478 Tel 0161 746 8037 TW Electronics (Newbury) Fax 0121 789 7931. Fax 0161 746 8136. Ltd., Beacon House, Harts Lane, Electromail, PO Box 33, Corby, www.mces.co.uk Burghclere, Newbury, Berks Northants NN17 9EL. Irwin Electronics, Tuner, modulator, upper drum, RG20 9JZ. Tel 01536 204555 Unit 200, JC Albyn Complex, LNB and digital TV equipment Tel 01635 278 678 Fax 01536 405 555. Burton Road, Sheffield S3 8BX. repairs. Fax 01635 278 266. Tel 0114 273 9622 Electrovalue Ltd, Fax 0114 275 9909. Nikko Electronics, 358 Vista Electronics, Unit 5, Beta Way, Thorpe Ind. Kingston Road, Ewell, Surrey KT19 Unit 2, Wingate Grange Industrial Park, Egham, Surrey TVV20 8RE. Ji Components, ODT Estate, Wingate, Co. Durham Tel 01784 433 604 Rear of 243/247 Edgeware Tel 020 8393 7774 TS28 5AH. Fax 01784 433 605. Road, Collindale NW9 6LU Fax 020 83937395. Tubes:Tel 01429 837 100 Tel 020 8952 2371 Components: 01429 838 057 Express Tubes, Fax 020 8952 7982. Philex PLC, 110-124 The Fax 01429 837 101. The Mill, Mill Lane, Rugeley, Staffs email: Broadway, West Hendon, London WS15 2JW. [email protected] NW9 7PP.

418 May 2002 TELEVISION SPECIAL OFFERS MARCONI 2019A GOULD os 300 OSCILLOSCOPE JUST IN DUAL TRACE H P 6003E DC Electronic Load 3-240V/0-10A 250W • • - 20MHz TESTED P.O.A F.• • • •••• H P 663I2A PSU 0 - 20V/0-2A £400 s'.7.•••/ - MANUAL HP 663118 PSU 0 - 15V/0-34 £400 HP 66309D PSU Dual 0 - 15V 0-3A/0-12V 0-1.5A £750 3 .1, • • lie . H P 66328 PSU 0 - 20V/0-5A • . • i.e. xs; OSCILLOSCOPES H P 6623A PSU Triple Output ranging from £850 TEKTRONIX 2445A 4 Ch TEKTRONIX TDS350 Dual Trace 200MHz 1G/S ONLY AM/FM synthesised signal 0-7V 0•5A to 0-20V 0-4A 150MHz Delay. Cursors etc unused £500 generator 80kHz - 1040MHz H.P./Agilent 34401A OMM 6'/, digit £400/£450 Supplied with 2 Tektronix probes QED> TEKTRONIX TDS320 Dual Trace 100MHz 50011A/S £1200 NO W ONLY £400 TEKTRONIX TDS310 Dual Trace 50MHz 200M/S £950 H P. 3478A OMM 5i/y digit £275 TEKTRONIX 2232 Digital Storage Sr . LECROY 9400A Dual Trace 175MHz SG/S £1500 FLUKE 45 NAM Dual Display £400 HITACHI VC6523 Dual Trace 20MHz 20M/S etc 100 MHz.100m/s with probes .. £525 KEITHLEY 2010 OMM 7I/ 2 digit £950 MARCONI 893C AF Power Meter. Sind Measurement unused £600 H P 54501A Digitizing Osoilloscope100MHZ. 4Ch £425 KEITHLEY 617 Programmable Electrometer £1250 H P 3312A Function Gen 0.1Hz-13MHz AM/FM Unused £100 Used £60 PHILIPS PM3092 2.2Ch 200MHz Delay £800 As New £950 H.P 43380 Milhohmmeter £1500 Sweep/Tn/Gate/BurSt etc...... £300 MARCONI 8935 • No Sinad ...... £30 PHILIPS PM3082 2.2Ch 1001111z Delay etc . . RACAL Counter type 1999 2.6 GHz £500 FARNELL Dual PSU XA35-21 0-35V 0-2A Twice OMO MARCONI 2610 True RMS Voltmeter Autorangin 5Hz- £700 As New £800 H P Counter hype 53131 A 3Gil , • • £850 LCD Display .£180 25MHz £195 TEKTRONIX TAS465 Dual Trace 100MHz Delay etc ..£750 H P /Agilent 33120A Function Gee/ARE £900/£1000 CIRRUS CRL254 Sound Level Meter wits Calibrator GOULD .1313 SineiSg Osc. 10Hz.100kHz. Low distortion TEKTRONIX 24650 4Ch 400MHz Delay Cursors etc£1500 100microHz - 15MHz 80-120a. LEO £150 £75-£125 TEKTRONIX 2465 4Ch 300MHz Delay Cursors etc ...£900 FARNELL AMM255 Automatic Mod Meter 1 5MHz- AVO 8 Mk6 in Ever Ready Case, with leads etc £80 TEKTRONIX 468 Dig Storage Dual Trace 100MHz SONY/TEKTRONIX AFG320 Arbitary Function Gen £1250 2GHz Unused £300 Others Avos from £50 Delay £450 H.P 8904A Syn Function Gen DC - 600KHz£1000/£1250 fARNELL 0501 Low Frequency Syn Sig Gen GOODWILL GVT427 Dual Ch AC Millwoltmeter 10mV in 12 TEKTRONIX 466 Analogue Storage Dual Trace BLACK STAR JUPITOR 2010 Function Gen 0 2Hz - 2MHz 0 001Hz to 99 99kHz, Low Distortion TTL/Squarei Ranges Freq 10Hz-1MHz £100-£125 100MHz £250 with Frequency Counter £140 Pulse Outputs etc £95 TEKTRONIX 485 Dual Trace 350MHz Delay Sweep M O H P 8116A Pulse Generator 1mH-50MHz. £1950 SOLARTRON 7150 (AM 61/2 digit True RMS - IEEE TEKTRONIX 475 Dual Trace 200MHz Delay Sweep £400 FLUKE 8060A Handheld True RMS OMM 41/2 digit H P 8657B Syn Signal Gen 0 I-2080MHz 2500 £95-£150 TEKTRONIX 4058 Dual Trace 100MHz Delay Sweep £325 As new £150 Used £95 SOLARTRON 7150 PLUS .... . £200 PHILIPS PM3217 Dual Trace 50MHz Delay ...f200 - 050 CO-AXIAL SWITCH 1 5GFiz BECKMAN H0110 Handheld 3V2 digit OMM 28 HUM QUALITY RACAL COUNTERS GOULD 001100 Dual Trace 30MHz Delay £150 IEEE CABLES ranges with battery. leads and carrying case £40 9904 Universal Timer Counter. 50MHz £50 HAMEG HM303 Dual Trace 30MHz Component 9916 Counter. 10Hz-520MHz Tester.... £275 H P 3310A Function Gen 0 005Hz-5MHz Sine/S eri/ HAMEG 66203 7 Dual Trace 20MHz Component HP 85618 50Hz 6 5GHz 9918 Counter. 1011z-560MHz. 9-digit £50 Ramp/Pulse £125 Tester £200 H P 8560A 50Hz - 2 9GHz Synthesised i WAYNE KERR 6424 Component Bridge £125 FARNELL FLM4 Sine/Sp Oscillator 10F17-1MHz low FARNELl DTV20 Dual Trace 20MHz Component HP 8594E 9Kliz - 2 9GHz £45004/I distortion ni Output. Amplitude Meter £125 RACALJAIM 9343M. LCR Databridge. Digital £200 Tester £125 HPP 8591E 1MHz - 1 8GHz 75 ohm £35,), HP 545A Logic Probe with 5465 Logic Pulser Automeasurements of FI CLOD MANY OTHER OSCILLOSCOPES AVAILABLE H.P 853A with 8559A 100KHz - 21GHz £2250 and 547A Current Tracer £90 HUNTRON TRACKER Model 1000 £125 MARCONI 2022E Synthesised AM/FM Sig Gen £525 - £750 H.P 8558B wqh Main Frame 100KHz • 1500MHz £1250 FLUKE 77 Multrmeter 3I/y digit Handheld £60 MARCONI TF2015 AM/FM sig gen. 10-520MHz £175 10KHz - 1 OIGHz LCD Display etc FLUKE 77 SERIES II . £70 FLUKE 8050A 4 5 Digit. 24 True RMS £75 H.P 8657A Syn 100KHz - 1040MHz Sig Gen £2000 H.P 3585a 20Hz - 40MHz £1000 HEME 1000 LCD Clamp Meter 0-1000A In Carrying FLUKE 8012A 3 5 Digit. 2A £40 H P 86568 Syn 100KHz - 890MHz Sig Gen 135 H P 3580A 5Hz - 50KHz Case ...... £60 H P 8656A Syn 100KHz - 990 MHz Sig Gen ££995 0 ADVANTEST R4131B 10KHz - 3 buH2 1,35, Racal 9008 OHL Y4 CE alb ROS APN62 Syn 1Hz • 260KHz Sig Gen 42 EATONAiltech 757 0 001 - 22GHz £1500 BLACK STAR ORION PAL/TV VIDEO Colour Pattern Balanced/Unbalanced Output LCD Display Automatic Modulation Meter AM/FM MARCONI 2382 100Hz - 400MHz High Res £2000 Generator trom £75-£125 PHILIPS PM5328 Sig Gen 100KHz - 180MHz £ wit5h 1 5MHz-2G1-11 MARCONI 2370 30Hz - 110MHz from £500 THURLBY/THANDAR TG210 Functibn Generator £550 O 002HZ-2NHZ TTL etc trom £80-£95 2Fr(*eqMCHozunter IEEE HP 182 with 8557 10KHz • 350MHz £500 THURLBY THANDAR PSU PL3200MD 0-32V 0-2A Twice Portable Appliance Tester RACAL 9081 Syn AM/FM Sig Gen 5KHz - 1024MHz 050 HP 141T Systems (Late colours) £200 Megger Pat 2 UNI £.180 HP 3325A Syn Function Gen 21MHz £600 8553 IKHz - 110MHz from £500 MARCONI 6500 Amplitude Analyser £1500C 8554 500KHz - 1250MHz from £750 Dairen 1081 HP 4192A Impedence Analyser 5000 8555 10MHz 186Hz from £1000 High Quality 55 Digit Bench Multimeter £150 HP 60128 DC PSU 0-60V, 0-50A 1000W £1000 HP 4275A LCR Meter 10KHz - 10MHz n750 True RMS/4 wire Res/Current Converter/IEEE FARNELL AP60/50 1KW Autoranging £1000 H P 8903A Distortion Analyser m oo TEKTRONIX 491 10MHz - 12A GHz £500 WAYNE KERR Inductance Analyser 3245 £2000 FARNELL 1160-/50 0-60V 0 50A ... . £750 HP 8443 Tracking Gen/Counter 110MHz £250 HP 8112A Pulse Generator 50MHz £1250 (Wren 108111 FARNELL I-160/25 0-60V, 0-25A £400 H P 8444 Opt 059 . £750 High Quality 6i/y digit Bench Multimet, ellr e r allk MARCONI 2440 Frei Counter 20GHz £1000 Power Supply HP0010 0-30V. 0-10A £140 8 & K 2033R Signal Analyser .. £750 True RMS/4 wire/Current Converter H P 53506 Free' Counter 20GHz £2000 FARNELL L30-2 0-30V. 0-26 £80 HP 5342A 1011z 18GFU Peg Counter £8013 H.P 5372A Frequency 8. Time Interval Analyser £2250 Racal Receiver RA1772 FARNELL L30-I 0-30V. 0-1A £60 H P 16508 Logic Analyser 80 Channel £1000 H.P 8754A Network Analyser 4MHz - 1300MHz £1250 50KHz - 30MHz Many Ofilif Power Supplies available. MARCONI 2305 Mod Meter 500KHz - 2Ghz £750 H.P. 3577A Network Analyser 5Hz - 200MHz £3000 £250 RADIO COMMUNICATORS TEST SETS LED Display .Basically Working 1,51a1,5g Transformer 240V IniOut 500VA £40 H.P. 53310A Modulation Domain Analyser Opt MARCONI 29552955A from £1500 Rohde & Schwarz CMT 01 - 1000MHz £2000 001/003 £5000 STEWART OF READING Schlumberger 4040 £900 ONO SOKKI Portable EFT Analyser £1500 110 WYKEHA M ROAD, READING, BEAKS RG6 1PL Telephone. (0118) 9268041 Fax. (0118) 9351696 VISA USED EQUIPMENT - GUARANTEED. Manuals supplied. www.stewart-of-reading.co.uk This is a VERY SMALL SAMPLE OF STOCK. SAE or telephone for lists. Please check availability before Callers welcome 9am-5 30pm Monday to Friday (other times by arrangement) ordering. CARRIAGE all units £16. VAT to be added to total of goods and carnage.

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Delivery anywhere in the UK. SPEEDREVIE W LTD EURO HOUSE High quality products ARMSTRON G STREET TEAM VALLEY TRADING EST. VCR'S, TELEVISIONS, HI-FI'S, GATESHEAD NE11 ORQ DVD'S TEL 0191 2329037 TEL 0191 4872668 TELEPHONE FOR DETAILS FAX 0191 2618866 OR VIE W BY APPOINTMENT. ALL PRICES EXCLU DE VAT AND DELIVERY E8 OE) - AN TE E D FAC T O R Y REF U R BIS H E D s a result of the double peak in the current solar cycle (number A23) there has been extensive F2-layer reception in the UK from early morning through to early evening. On February 27th, the day I'm writing this column, ch. RI vision (49.75MHz) abruptly lifted above the noise at 0715 hours GMT for about fifteen minutes before fading, suggesting a really log-hop path from SE Asia/China. There was further reception later. On some days ch. E2 (48.25MHz) does better, on others ch. RI. On several days we have had Australian TV ch. AO (46.25MHz), not only as video buzz on a scanner but real video on a TV screen! There was a slight tropospheric lift early in the month, with reception from France, but the main news is the on-going F2 propagation. I logged ch. E2 and RI signals on many days during the month. When I checked the frequency offset with Australian ch. AO reception on the 24th, via a scanner, I found that it was at 46.1718MHz. This confirms that the signal was from RTQ-0, Mount Mowbullan, Darling Downs, Queensland. Is scanner reception true DX-TV? The video buzz was clear, but the signal level was below the locking level with even a D100 plus TV receiver combination. On the 20th I was home from work early and noted, from 1445- 1500, a steady ch. E2 video buzz from due south. There was a locked but unidentifiable picture on-screen, fading out by 1515. The signal was obviously from Africa, but exactly where? One advantage with a scanner is that you can weaken the signal sufficiently, using a Radio Shack variable attenuator for example, DX and to be able to isolate and measure the single video carrier, then compare the result with a listing of known video offsets. This gives instant identification of signal origin. Cyril Willis has logged ch. E2 video carriers at 48.2369, 48.2498 and 48.2240MHz for example. One recent catch he had with his scanner was hearing the Californian Highway Patrol at 42.12MHz, from Napa, with Satellite mention of the Golden Gate Bridge. He adds that DXers down under have been enjoying excellent TE (transequatorial skip — see below) reception at up to Band H! Cyril locked a strong TV signal from RTQ-0 at 0833 on the 16th. Hugh Cocks in the Algarve has also received the Australian ch. AO. He has been experiencing TE reception from the south after Reception dusk, extending towards WSW to bring in American signals as late as 0300 next morning. Peter Schubert (Rainham, Essex) also Terrestrial DX and satellite TV enjoyed F2 reception on most mornings during February, from before 0800 through to lunchtime, using crossed Band I dipoles. reception reports. News on TV In the north Frank Lumen (Irvine, Scotland) has been using a broadcasting and satellite band multi-standard Thomson TV set for F2 reception. I received, via e-mail, an extensive log from Robert Copeman changes. The current sunspot cycle. in Melbourne, Australia. Several entries related to Black Sea An easy-to-build VHF preamplifier radar, which operates at 33-34MHz — the frequency varies daily — and produces a characteristic buzzing noise. Another unusual circuit. Roger Bunney reports entry is Woodpecker, from the Philippines, operating at about 43.649MHz. To summarise, there have been lots of strong signals during the month, via F2 in particular. But, so far, no buzz from New Zealand ch. 1 at 45.25MHz. A scanner has become an essential tool for monitoring the low VHF and lower Band I TV channels. With new all singing and dancing models being introduced, older ones are being pensioned off. As a result most SW radio dealers have available reasonably inexpensive scanners that cover Band I TV and below. I use an AR2002 and a slightly newer Icom R7000 with a discone aerial at 35ft. The rather older SX200 is available for as little as £50. It's basic, solidly built and has twenty memories, enough for all the Band I TV channels. Transequatorial skip propagation occurs after a day of high MUFs as the F2 layer breaks up when the sun sets in the west. The F 1 and F2 layers fragment, producing ionised layers that reflect signals at perhaps 1-5 times the daytime MUF, usually on a north-south axis moving towards the SW. In the UK, reception is best in the south and Channel Islands — TE conditions improve as A NASA-7V news conference prior to the STS109 Shuttle flight you go farther south. That's why Hugh Cocks in Portugal enjoys to the International Space Station. Reception via NSS K. signals that fail to reach our shores.

420 May 2002 TELEVISION

M1 • Satellite sightings If you will be holidaying near Southsea this year, check out the Explosion Museum at Gosport. It features all types of armaments and explosives used in warfare, with the emphasis on Royal Navy material. If however you had been monitoring Europe*Star-1 (45 °E) on the afternoon of February 24th you could have watched your own explosion. A CNN video feed appeared at 1 l•544GHz V (SR 5632, FEC 3/4) with the identification Qandahar. It showed US troops unloading piles of captured explosives, shells, etc. from a lorry and piling them in two lines. Armourers attached plastic explosive, inserted detonators and wiring and then retired a safe distance over a small hill. This was followed by a massive explosion, with a large smoke mushroom. Satellite feeds from Afghanistan have been reduced considerably, but over February 15-17th the BBC was using unusual screen identifications on colour bars — "BBC — UKI-302 Kabul" alternating with "BBC — UKI-302 New Tube". This was from 45 °E at 11.48IGHz V. Roy Carman (Dorking) has also noted feeds from Quandahar. It seems that there's a CNN team there to video the US military at work. At 11•685GHz V he logged a US Marines Huey Cobra being checked and rearmed. Dan Rather visits US troops in Afghanistan. Reception via Two days later, at 11.544GHz V, he saw the marines grouping, Europe*Star-1. boarding helicopters and flying out. Interesting that the lights in the helicopters are orange and gradually dim as the drop-off zone Local-TV: My Television Portsmouth is transmitting to the east is approached: this is to help the troops adjust to the Afghanistan and north east from a Gosport waterfront apartment. The channel darkness when on foot. is E29, e.r.p. IkW. My Television Southampton is not yet in I don't usually spend time checking the digital signals at operation. It's seeking a channel allocation change to E29, with 19-2°E (Astra), but on the 17th Edmund Spicer (Littlehampton) aerials on the Fawley power station chimney. Manx-TV is suggested that I look at 12.344GHz H (27500, 3/4). This is a expected to start this year, with low-power transmitters initially Dutch multiplex, with RTL-4, RTL-5, Discovery, Animal Plant serving Ramsey, Douglas, Onchan and Peel. and National Geographic, all encrypted. But I also found "no name", which had earlier been captioned "transponder news channel". When I checked there were just colour bars and an unusual test card, then the screen went black. The Winter Olympics from Salt Lake City, Nevada, were a main feature during February. The Globecast package via NSS K www.Aerial-Techniques.com (21.5 °W) carried two feeds on most days. There were interviews and events at the usual 11•590GHz V (20145, 3/4), with many reports for overseas. On the 21st for example "RTL Lisbon Text SKY DIGITAL FROM ONLY £399.00 INC VAT. Signal" was seen on channel 1. A channel 2 special on the 15th This includes: featured NASA-TV from the Johnson Space Center, with • The new Grundig GDS-3000 low threshold receiver engineers and the crew of the next Shuttle flight, STS109, to the • One of our high gain mesh dishes, plus all accessories International Space Station. • All connection cables and plugs The World Economic Forum was carried by Reuters via NSS K • Free viewing card, accessing; BBC1, BBC2, ITV-1, Channels 4 & 5, BBC Radio 1, 2, 3, 4 & 5 plus many on February 2nd, at 11.462GHz V. I have to say that it was not other channels exactly compulsive viewing! • With or without telephone connection or Sky contract Our Sutton correspondent Nick reports that when AFTN • Reception in most home and distant locations disappeared from Hot Bird at I3°E he found a website that • Additional tripod (as shown) available for £39.95 inc VAT directed you to 12.629GHz H (5632, 3/4) via Eutelsat 2F4 (10°E). • Registered Sky Digital dealers Astra 1D is at present at 24.2°E and has been seen downlinking NTSC video. Check "Channel D Germany" at 10.714GHz H FECT FOR iet WOW M T NE V- (2170, 3/4). Sometimes the transmission is free-to-air, at other times it's encrypted. THOMSON 14"/36cm Colour TV

RSD receivers Multi standard TV with integrated VCR I have a problem with a couple of new RSD ODM-30-CI Covers VHF/UHF/PAL/SECAM for use in the receivers. When presented with certain news feeds, for example U.K, France + Europe. • 2 Integrated tuners • International Teletext Reuters, they blank the screen and produce the caption "please • Infra-red remote control • Built-in TV guidi insert cam". However a three-year old RSD ODM-300, which • Satellite compatible • Video Plus • NTSC playback doesn't have a common interface slot, happily displays the • Front RCA phono connector jacks Reuters feed and all other signals. Can anyone suggest a way of • Endless record and endless playback overcoming the ODM-30-CI problem? I just want the receivers to • On-screen menu • Sleeptimer • Silver cabinet work like the ODM-300. There's unfortunately no RSD factory Overnight Inc VAT including a FREE back-up, as the company has ceased UK production. ONLY £399.00inc WIT inverter enabling you to run it delivery by oft 12V DC insured courier £10.00 Broadcast news EXCELLENT SERVICE AND FRIENDLY ADVICE Russia: The authorities have closed down the Moscow-based FULLY COMPREHENSIVE 35 PAGE CATALOGUE AVAILABLE BY RETURN OF POST FOR £1. 50 independent TV station TV6 and put the licence up for bids. 59 Wateombe Road, Southbourne, Bournemouth, Dorset BH6 311 Recently the TV6 channel spectrum has been used by NTV-Plus Tel: 01202-423555 Fax: 01202-425055 1 ' to transmit the Winter Olympics from Salt Lake City. E-mail: atech,a dircon.co.uk E 3 M Â

TELEVISION May 2002 there has been a second peak in solar activity this winter. It has provided reception at up to ch. E3 (55.25MHz), with sustained and regular signals from SE Asia, the Middle East and even Australia (ch. AO). In fact a double-peak has occurred in all three of the latest eleven-year periods, i.e. cycles 21, 22 and 23. This is in contrast with the previous well-defined solar cycles, and is making it difficult to calculate specific cycle periods. The accepted eleven-year periods could be at an end. The second peak in the current cycle is the result of greater solar activity than the first peak some eighteen months ago.

Simple VHF preamplifier Ian Moody (Sutton, Surrey) has designed an adaptable, two-stage wideband amplifier for use in Band I, Band II or Band III, depending on the collector coils fitted. The circuit is shown in Fig. I. It uses the very cheap BFY90 transistor, a well-proved device that has been used in the past for DX purposes, or the similar 2N5179. No alignment is required. Provided the usual VHF construction practices are followed — the use of low-noise resistors, very short lead lengths, a copper-clad PCB and, preferably, a diecast/metal housing — the design should be repeatable and stable. The input circuit is flat and wideband. Ian suggests the use of A Winter Olympics transmission from Salt Lake City via Polytron Band I, II or III pluggable input bandpass filters, which Globecast (NSS K). are available from Aerial Techniques (see nearby advertisement), should there be any concerns about breakthrough. Despite using self-resonant collector coils, it would be possible for 'out-of- Spain: The government has decided to use the MHP digital band' signals to pass through. This could result in interference standard, but decoders will not be available until next year. This from taxis for example, particularly in Band III. Those requiring will affect the government's plans for DIT. high-gain amplification in Band I should remember, in residential areas, the problems caused by low-power 49MHz equipment. If Italy: The Italian prime minister and media mogul Silvio you live anywhere near an MW transmitter, it would be advisable Berlusconi intends to privatise two of the three RAI national to include a choke across the input to minimise breakthrough. networks. He will also appoint the RAI board. These services are The amplifier requires a 12V supply at 9mA. Ian measured the in competition with his own commercial and pay-TV operations. signal voltage gain at 40MHz and found that a very respectable 27dB was achieved. The Fame11 coils used in the original design Austria: The country's first commercial TV licence has been had self-resonance at 57MHz in Band I, 95MHz in Band H and awarded to Austrian Television (ATV). 199MHz in Band III. Order codes are 524-128 Band I, 508-240 Band II and 608-464 Band III. But there's a minimum quantity of The Netherlands: The e.r.p. of the Smilde transmitters that five of each, and for non-account customers a minimum order of radiate TV2 and TV3 on chs. E44 and E47 has been reduced from £10. Fame11's phone no. is 0870 1200 200. Suitable coils with a 1,000kW to 250kW. similar self-resonance are available from Maplin. The Band I coils, order code WH33L, are self-resonant at 56MHz and have an Belgium: RTBF is transmitting a new local TV channel, AB-3, inductance of 4.7p,H; the Band II coils, order code WH31L, are using ch. E60. There are now two OVB-T digital TV channels in self-resonant at 110MHz and have an inductance of 2.24; the operation in Brussels. These transmit on chs. E55 and E61 (H) at Band III coils, order code WH29G, are self-resonant at 157MHz 2kW e.r.p. and have an inductance of 11.1.H. All these Maplin coils cost 69p each including VAT. Trade readers could check for equivalent Sunspot cycle 23 inductors in the RS catalogue. sunspot cycle 23 peaked during the winters of 1999-2000. Subsequently, following the expected period of decreasing spot Satellite news counts and much lower MUFs (maximum usable frequencies), Pegasus Satellite TV, in conjunction with state and local police, have arrested a Dallas pirate who had been supplying DirecTV cards throughout Georgia. He was given a hefty fine plus ten years 12V probation. For more information go to .01 http://www.pgtv.com Scopus Technologies of San Diego and the Argentinian company Extel Engineering have developed a new security system c b Tri .2 for use with integrated receiver-decoders to prevent distribution BF Y90 fraud. SatLock establishes an IRD's exact location to within Ouput 3/100ths of a minute for both latitude and longitude. Should an at IRD be moved by more than 50 yards the IRD locks out and stops Input 15p 750 at working. For more information check 750 http://www.scopususa.com The Indian national broadcaster Doordarshan launched a 24- hour culture channel, DD Bharati, which uses the former (now closed) DD News Channel slots. It provides children's, health and local heritage/cultural programming. Transmission is both Fig. 1: Ian Moody's wideband VHF amplifier design. terrestrial and via satellite. •

I May 2002 TELEVISION and tried again. There was severe arcing dead. But the label on the back, stuck from the CRT's scan-coil connector and there by a previous repairer, suggested the replacement BU508AF bit the dust. trouble before I had even got the back off' I remade the connection to the scan And so it proved to be. coils, fitted another line output transistor The BU508AS2 line output transistor and switched on. The set worked with the had been replaced with a BU208A. As protection circuit disconnected, but when this transistor obviously wouldn't fit on it was reconnected the set remained in the original heatsink, the repairer had standby. The fault had damaged several of taken a heatsink from a scrap set and the small, surface-mounted transistors in bolted it to the original one. Photo 1 ‘i‘ the protection circuit. shows the bodge. I've since had a number of these sets A new transistor was obtained from with the same fault, and I now know to go Sony, together with a clip and the circuit straight to the CRT's scan coil connector protector. Once these items had been PCB to repair any damage here. fitted the set worked correctly. Fortunately with all subsequent jobs of this type the protection circuit hadn't been Mitsubishi CT29B2STX (Euro 12 damaged. chassis) There were several reported fault Nokia ST51D2 (Mono Plus symptoms with this set: no text, sound chassis) crackling, picture geometry distortion I his set's picture was almost negative. and, sometimes, failure to come on from Service When I checked the set on the bench I cold. This suggested two things, a quickly discovered that the cause of the problem in the power supply and • problem was on the vertically-mounted EEPROM corruption. The usual causes of Casebook text PCB. The video signal was being failure to turn on from cold are C906 very severely crushed here. (471.IF, 50V) and C909 (2.2g, 50V) in There's very limited access to the print the power supply. The former is the Michael Maurice side of this board and, as most of the chopper drive coupling capacitor while components are surface-mounted, fault- the latter is in the slow-start circuit. finding is difficult. I decided to EEPROM corruption can be caused by disconnect the board from the main PCB leaky electrolytic capacitors on the and remount it at an angle so that I had secondary side of the power supply or the easier access to the print. Once this had EEPROM itself. I replaced all these items. been done it didn't take long to discover but when I switched on after doing so that the culprit was transistor R08 there was — nothing! (BC858). Checks showed that there was 330V across the 2SD1887 chopper transistor, Sony KV M2141U (BE2 chassis) and that the TEA2261 chopper control This set was brought in because it uas chip had a start-up supply. I decided to replace the TEA2261 chip and the chopper transistor. When I switched on again the set started up and went into standby. So far so good. But when I used Hitachi C2976TN (A5 chassis) the remote-control unit to switch the set There was an EW fault with this set — the out of standby there was a loud bang. A picture was expanded and bowed. I first flame shot out of the side of the chopper ibund that L751, which appears to be the transistor and, before I could reach for the EW loading coil, was dry-jointed. But switch, every component between the resoldering it didn't cure the problem. base of the transistor and the IC had been The EW drive comes from IC601 burnt and the top had been blown off the (TDA8350Q), which is also the field IC. output chip. A fair bit of dismantling has I was quite shaken by this, and started to be carried out before this IC can be to look for a cause. I've had chopper replaced, but it's the usual cause of the transistors fail before in these sets, but fault. Make a note of the connections of never like this! I decided to rebuild the the three small capacitors that are power supply, this time with parts mounted on the print side of the PCB, obtained from a different source. When I across several of the IC's pins. I've had showed the new supplier the blown this fault several times now. transistor he suggested that it was probably a graded part or a second. Philips 28CL6770/05 (FL1.0 I fitted the new parts and switched on, chassis) making sure I was sufficiently far from This set was stuck in standby. The cause the set. To my delight it came on and then appeared to be simple enough — the Photo 1. Line-output stage bodge in a came straight out of standby. I left the set BU508AF line output transistor was Sony Model KVM2141U To fit a BU208A running for a few minutes, then set about short-circuit. But the set was still stuck in output transistor, a previous repairer had reprogramming the EEPROM. The standby when I had fitted a replacement. bolted a scrap heatsink to the one mount- picture and sound were, as expected with So I disconnected the protection circuit ed on the PCB these sets, excellent. •

TELEVISION May 2002 423 Acer 7176ie was open-circuit. It's in the CRT's first This monitor was dead because, as often anode (G2) feed. All was well once a happens, the 2SC5048 line output replacement had been fitted. P.I. transistor Q306 was short-circuit. But replacements failed repeatedly after a IBM Thinkpad laptop PSU few hours on soak test. The cause was The complaint had been "no operation -. rather obscure. There are three series- When I opened the PSU, which is based connected 2.2µF, 450V electrolytic on the use of a '3842 IC, I found that it capacitors, C3950-52, in the line output was working. Flexing the low-voltage stage. They varied in condition between cable produced brief flickers in the LEDs very-high ESR and open-circuit. In on the laptop, so there was obviously a addition C353 (10g, 450V) was a little break in the wire. If you want to trim back low in value. Once replacements had the PSU end you have to salvage the been fitted the monitor performed strain relief gland from the off-cut and glue it on to the trimmed cable, and feed reliably. G.M. the separate leads through the ferrite ring CTX1769ME as with the original, but this is still easier This monitor was dead apart from a soft than dealing with the four-pin connector chirping noise. The power supply was at the other end! I took care over the tripping, but the usual suspects were all repair and it looked as-new — but still OK. I decided to carry out checks on the didn't work. There were breaks in the primary side of the circuit and wire inside the four-pin connector. discovered that D101 (BYV26), in the At this point I contacted the customer snubber network, was short-circuit. to tell him that it might be better to order a replacement lead from IBM. In reply, he MONITORS G.M. said that he had explored this possibility Fault reports from Eizo Flexscan F56 (M M 785) on a previous occasion and found that it This monitor powered up but tripped wasn't cost-effective. He asked me to Gery Mumford loudly, with its LED blinking green. attempt a repair to the moulded plug. After a substantial strip-down (many The plug is easier to cut open than it Peter Illidge screws, and metal plates everywhere!) I looks. It's not solid-moulded but was able to carry out some checks and assembled, though the solder connections and found that a surface-mounted fuse, F905 are moulded into a softer plastic under the plastic cover. This made identification of Ian Field (T3A SMD), was open-circuit. It's on the secondary side of the power supply. which wire goes to which pin hard work — As no short-circuit could be found, I until I realised that the pin designations fitted a replacement. The monitor then are embossed on the computer casing, produced a fine display and was flawless around the connector recess. The solder after a long soak test. G.M. tag had parted from one of the pins, and two of the wires were broken inside the Viglen CA1426LT insulation, so this end of the lead had to be pruned back a couple of inches as well. This old monitor was dead with a blown-up power supply. The BUW12A Now I know that these connectors are chopper transistor Ql, its 2SA966 driver assembled instead of one-piece moulded. transistor Q2 and the current-sensing it's worth trying to pry the plug hood resistor R4 (0.47Q, 1W fusible) had all from the connector insert instead of failed. The supply is based on a UC3842 cutting it away. However you do it, chip, ICI, so I decided to replace this as silicon rubber sealant is suitable for well. The monitor then produced a very securing and insulating the solder We welcome fault reports from good display. G.M. connections. With a bit of practice it may readers — payment for each fault is be possible to make the repair look as made after publication. Acer 7176ie good as new. I.F. There was excessive width and EW Reports can be sent by post to: bowing. Checks in the EW diode- ICL15505/002 modulator circuit revealed that D309 This monitor's power supply had blown up. I've never had much luck repairing Television, Fault Reports, (FES8JT) was very leaky. G.M. one of these power supplies when it has Anne Boleyn House, gone bang. The self-oscillating chopper 9-13 Ewell Road, Relisys TE770 This 17in. monitor had no display. The transistor has no emitter resistor, and I Cheam, customer said that it had become darker suspect that when the transistor goes Surrey SM3 8BZ and darker. When I tried the monitor I short-circuit it dumps the full charge found that the EHT rustled up at switch carried by the reservoir capacitors C807/8 or e-mailed to: on and all the supplies seemed to be into the chopper transformer's primary [email protected] present. So I took a look at the CRT winding, damaging this item. R801 (3.3Q, panel and found that R5C1 (530k52, 1W) 10W) in the negative feed is misleading in

May 2002 TELEVISION this respect — it's the surge limiter out, the result being a slow drive- monitor out. between the rectifier and C807/8. waveform rise-time and thus excessive There was no display, and I soon found In view of the work involved in dissipation. I replaced it as a precaution. that the line drive was missing. There was removing the power-supply module from At this stage in the proceedings the a short burst at switch on, but the monitor the chassis and stripping it down, I condition of the line output transformer shut down almost instantly. Since the wanted to complete the repair in the was still unknown. In most cases feeding power supply continued to run and the simplest way possible and not have to do the full HT to the LOFT via a series- CRT's heaters were being driven, it again. Fortunately I had a scrap 15505. connected 60W lamp will confirm switching off to reset the safety circuit It had been taken out of service because whether or not there are any further faults then very quickly switching on again of very random failure to start. I had in the output stage, while limiting any before the cathodes cooled should have never actually seen this fault, but the fault current to a safe level. This time the produced a clue. It did: the symptom customer complained that the monitor current was limited to too safe a level, displayed was a vertical line. started every time except when he wanted giving little information about the No damaged components could be to sell it! There was undoubtedly a power condition of the output stage. found in the coupling to the line output supply fault, but at least it wasn't a blown A method I often use when checking stage, but the soldering around transistors up. I decided to see if I could use it to Samsung monitors, which use a similar Q406/7 looked odd. While I was replace the blown-up one. PWM width regulator, is to feed the line attending to this I noticed that the PCB When I examined the intermittent output stage from the lower 75V power pad for fixing the underside screening power supply I found that R803 (56kQ, supply output instead. A look at the Mitac plate beneath the LOFT, next to T401, 3W) looked heat-bleached, though it power supply showed that the next lower was damaged. On some versions of this checked out OK. I replaced it to be safe. rail was a bit higher, at 80V, but it seemed chassis the pad surrounds the slot. In this R810 (390kS2) had 'wrinkly-looking' a reasonable risk to take. So a temporary version the hidden (when the screen is paint, and its resistance was greater than diode (type 30DF6) was added between fitted) part of the solder pad has a gap, so my DMM's 20MQ limit. The blown-up C916/L905 and L601. The result was a the only circuit path is via the very thin power supply had a I per cent instrument- display of almost exactly the correct part of the pad, which often gets damaged grade component that looked and tested width for the screen mode in use, proving when the screen is removed. When as-new in this position, so I 'borrowed' it. that the line output stage was OK. tracing the track away from the break, 1 It's advisable to replace C815 (4.7µF, Unfortunately when a replacement could find no other path to chassis. So the 63V), C812 (10µF, 63V), C821 (47µF, IRF9620 MOSFET had been fitted in the circuitry downstream was left floating. 25V) and C826 (47µF, 63V) to avoid PWM width-regulator circuit nothing The cure is to fit a stout, insulated wire problems later. A curious thing about happened. The pulse generator (U601) in link nearby, where it will not be disturbed C821 is that it's huge in comparison with this chassis is an NE555N, which I tried when removing the screen. C826, which is tiny. All the electrolytic replacing without any luck. The cause of All was well after doing this and capacitors in the regulation circuit on the this remaining fault turned out to be attending to a few more dry-joints. I.F. primary side of the power supply are ZD601, which protects the IRF9620's 105 °C types. I assume that C821 is an gate. It was short-circuit, and the Dell P1428E extra-low ESR type. If there is any doubt markings were unreadable. This monitor had been to my workshop about the performance of a replacement in With an n-channel MOSFET the before. The customer told me that he had this respect, add a 1µF, 63V metal-film protection zener diode is usually rated at stored it temporarily in an 'extension' capacitor in parallel with it, on the print 18-20V. But the IRF9620 is a p-channel that's similar to a conservatory, and that it side of the PCB. device. So I decided to use what one finds "went bang" as soon as he plugged it in Once I'd renovated the intermittent in Samsung chassis — typically a 6.2V or a On surveying the damage I saw that the power supply it proved to be a suitable 91 V zener diode. I used the lower of the PCB had tracking marks and 'nibbled' replacement for the blown up one. two ratings. Once the diode had been track edges between the —320V and the This monitor has a text-mode button fitted the PWM circuit worked correctly +320V pad under the chopper that selects green-amber text on a blue and the monitor was restored to life, transformer. This is typical of background. The Olivetti version is producing correct-width displays in all the condensation damage caused by the Model CDU1493. There is also an available modes. I.F. storage conditions described by the Apricot version. I.F. customer. But the monitor had suffered in Dell Vi428E exactly the same way before. Having Mitac AM4050PD "Picture wrapped round" the customer trimmed the faulty track edges and cut This monitor had already received had said. This suggested that the power deep grooves in the PCB material to attention — the BU2508DF line output supply was working, so there was no need ensure that any even partially carbonised transistor Q501 was missing. In addition I to replace the three small electrolytics on material had been removed, I was not found that Q612 (IRF9620) was short- the primary side of the power supply. expecting the fault to recur. circuit. Because of this situation, it was Adding non-electrolytic ESR-shunt This time I removed the transformer difficult to assess what could have been capacitors would ensure that this situation and cut a guard ring with a needle file, the basic cause of the trouble. continued for well beyond the warranty spanning a good centimetre at either side Monitors in this range tend to suffer period for the repairs. While doing this I of the affected area. My best guess is that from random line output transistor failure reworked any dry-joints I came across. a manufacturing defect had resulted in because the flyback tuning capacitor is The feedback pin on the primary side of unusual porosity in that small area of the defective. So work started with the chopper transformer had a severe dry- PCB. Despite the apparent severity of the replacement of C501 (3,900pF, 1.6kV). joint. With these matters attended to, bum marks, the only other item that had Q501's base drive is coupled by C508 along with a few more dry-joints in the suffered damage was the 3.15AT fuse. (100µF, 16V), which could have dried timebase area, it was time to try the I.F. •

TELEVISION May 2002 425 Sony SLV-SE710G The reason why it didn't turn was that the This very new machine chewed tapes centre gear (item K221) had a split in its because the supply spool didn't reel in side. The parts connected to it are all the tape at eject. I found that the capstan known to crack, usually giving rewind didn't turn backwards in rewind or problems. The centre gear can be reverse-search either. The capstan motor obtained from Charles Hyde, under part was the cause of the trouble. E.T. number 15005GA. B.F.

Panasonic NVG21 Aiwa FX3500 This machine had no display. Some The complaint with this VCR was that checks in the power supply revealed that "wait" appeared in the display and no C1018 (47g, 63V) was faulty. A other operation was possible. When I replacement cured the display fault, but switched the machine on it burst into life when a cassette was inserted the machine with no sign of a fault. I then inserted a switched off. Some further capacitor tape and selected play. The machine checks proved that C1023 was the cause. played back without any problems, so I Thank goodness for the ESR capacitor left it on test while attending to other tester. It comes into its own with this type jobs. of fault. K.G. When the tape came to the end the forward drive ceased and rewind began. Sony SLV-E720 (H mechanism) Almost immediately the machine stopped This VCR became very noisy in play or and "wait" appeared in the display. At record, especially after running for a this point no further operation was VCR CLINIC while. A scraping type of noise could be possible - unless the mains supply was heard, the same as with previous Sony disconnected and the machine was models when the capstan motor is faulty. restarted. When I did this and tried Reports from Although this model uses a different type rewind again the same symptoms of motor, it was the cause of the trouble. appeared. I inspected the deck, but Eugene Trundle After removal it felt very warm. A new couldn't find any defect with the motor and pinch roller cured the problem. mechanics or the deck sensors. It seemed Kevin Green B.F. that the system control was detecting a deck fault and shutting the machine Bob Flynn Saisho VR3400 down. After replacing a couple of items Steve Barlow If the cassette won't eject because the without success I changed the lower tape is caught up under it, or a loop of drum, using one obtained from a scrap Ivan Levy, LCGI tape catches up as the cassette is ejected, machine. I was surprised when I found take a look at the limiter post arm - item that this cured the fault, restoring normal Michael Maurice 328 in the diagram in the manual. It operation. Dean Ratcliffe and should move freely. If it's stiff, remove it I now know why I refuse to throw and clean off all the grease from its shaft away that huge pile of scrap VCRs in the Graham Bond and on the deck where it goes through. corner of my workshop! S.B. Refit it, with a small amount of new grease, and check that it springs back into JVC HRJ220 position. B.F. The report with this VCR said no play, wind or rewind. On test this was found to GoldStar P2341 (D27 be correct, though the machine did seem mechanism) to load a tape and made an attempt to This VCR had a tape stuck in it. When it play. But there was no tape movement. was plugged in, the mechanism unlaced On close inspection I found that the towards the eject position, returned to the pinch roller didn't quite touch the play position and then remained lifeless capstan. It is not easy to spot but there's a until it was unplugged and plugged in piece of black plastic, with a spring again. You then got the same shuffle. moulded into it, that acts as the pinch- There was also no display at the front. roller cam. Because this plastic cam was When I replaced CPI9 (1,000g, cracked, it didn't apply any pressure to 10V), CP21 (47µF, 50V) and CP25 the roller. Normal operation was restored (100g, 10V) in the power supply - they once a new plastic cam with spring had all give trouble - I was rewarded with the been fitted. S.B. same shuffle of the mechanics but there was now a display. This revealed all. It Sanyo VH335e said "lock on" - the machine was in the This machine played slow and cut out, child-lock mode. Pressing `C lock' on the with wowing sound and no drum sync. I remote control unit released it, giving initially thought that there was a normal operation. B.F. mechanical fault, but after a general We welcome fault reports from readers service I found that the machine would - payment for each fault is made after Toshiba V720UK (DX-9R deck) switch between the LP and SP modes. publication. See page 424 for details of The take-up spool didn't turn in play, so The cause was reservoir capacitor C501, where and how to send reports. the tape looped up inside the cassette. which was open-circuit. I.L.

42() May 2002 TELEVISION appear that the upper drum's mountings resistors between pin 8 of the chopper Panasonic AG7350 had dropped slightly, with the result that transformer and CP011; RP04-RP09; and This industrial VCR had no S-VHS it was seizing on the lower drum. I the two ZPDIO (10V) zener diodes in playback: there was just an dismantled the drum and added a very series with PD020 and DP044. D.R. unsynchronised picture, with the stereo thin shim, then reassembled it. The motor sound present. The VHS picture was OK. then turned freely. Once I had reset the Panasonic NVSD230B I found that the S-VHS signal was tracking and checked the tape path this The customer complained that the present at pin 5 of IC6 (the sub-emphasis lovely old VCR was finally restored to playback sound speeded up and slowed board), but there was no output from IC6. life. down. There's an official modification A replacement sub-emphasis board cured Although JVC would not have for this: change C2519 to 0.18µF, part the fault. I.L. approved of the repair, it was either this no. ECUM1C184KBN. D.R. or writing the machine off — a new lower Hitachi VTF860 drum is prohibitively expensive. M.M. Toshiba V312B The complaint with this machine was The complaint was no functions, though a noisy fast forward and rewind. I found Panasonic NVHD9OB cassette was accepted and laced up that the capstan had partially seized. A There was no UHF output from this normally. In this event, check the data and replacement capstan assembly cured the machine, the cause being a dry-joint clock pins 2 and 3 of the SDA5642 chip problem. I.L. within the RF modulator assembly. M.M. IW31 — this applies to machines without OSDs. If the signal is OK, unsolder pins 2 Sony SLV-E730 Panasonic NVHD605 and 3 of IW31. If the machine then There was a tape stuck in this machine, The complaint with this machine was no functions, IW31 is defective and must be because the slider assembly was broken. tuning. The on-screen display menu was replaced. The part no. is 276TX4341. D.R. A replacement, part no. 3-977-442-03, OK, but when a channel number was restored normal operation. M.M. dialled manually the picture was dark with Mitsubishi HSB12 line and field slip. The cause of the A problem you can get with these JVC HRD755 problem turned out to be the surface- machines is failure to erase the sound and When play or record was selected the mounted 4053 switching chip IC3902. picture and record new programmes. It's tape would start to load up then unload. D.R. sometimes intermittent. The usual cause The cause could be a worn loading belt or is failure of C333 (10g, 50V) on the top loading block of course, but not this time. Ferguson FV405HV panel. As a result, the voltage at pin 1 of The drum failed to rotate because it was This machine was dead with the BUZ91 IC310 reads about 0.5V instead of 11V in partially seizing. I dismantled the motor, chopper transistor running hot. I replaced the record mode. This prevents the but couldn't find the cause. It would the following items: the chain of 180kS2 bias/erase oscillator working. G.B. •

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TELEVISION May 2002 PCB and the main board looked a bit dull — see Photo 1. So I applied a tiny amount of contact-cleaner to them and worked the connectors up and down a few times. I also fitted a SatCure miniature cooling fan, as shown in Photo I. As there is no room for one on the mother board I attached it to the vertical steel front panel, using the double-sided foam tape supplied with it. The fan stirs the air inside the unit and helps to keep everything at an even temperature, removing 'hot spots'. This should improve reliability. I couldn't instigate the fault again so, next day, I handed the receiver back to the customer — fully 'fumigated'. As he hasn't been back I assume that the steps I took got rid of the `bug'. Intermittent faults like this are always difficult to handle: you can never be certain that you've cleared the fault and, even if you have, there's no guarantee that the receiver won't bounce back later, with similar symptoms but a different cause.

The Panasonic TU-DSB31 Another Panasonic digibox arrived for repair the same day. It was the later TU- DSB31. The owner had carelessly heaved the second RF output connector right off. while disconnecting the unit to move it. These connectors, see Photo 2, are not JACK'S easy to obtain. But I found that they are listed at the SatCure website Jack Armstrong (http://www.satcure.uk). I ordered one and fitted it the next day. As happens all too often, the customer wasn't the least bit - grateful. He insisted that it should have A Panasonic TU-DSB30 stamp collection, but dashed if I can see been fixed under guarantee. I pointed out that it hadn't been bought A strange and very old fellow stumbled any bugs in there. House is certainly into the workshop. He was dressed in clean. Housekeeper makes sure of that. from me — it had been 'free' from BSkyB — and that in any case I didn't cover Sky tweeds and a 'deerstalker' hat, and held a I'd be on to her if she didn't. No bugs warranties. I offered to remove the new magnifying glass in one hand and a about — had enough of them during the part for a bargain labour charge of only satellite receiver in the other. As he war. Don't talk to me about bugs." plonked it on the counter I saw that it was I was only too happy no to. "Leave it £25. He decided that he would keep it, and paid me with bad grace. a Panasonic TU-DSB30 Sky digibox. with me" I said, "I'll soon have it "I won't be back" he said as he "Bug in there somewhere" he said, fumigated for you." "but damned if I can see it." He marched out and I put the receiver departed. Good, I thought, as I went into the "Pardon?" I asked. on test in the back room. As it seemed to "Switches to standby all by itself, you be OK, I left it for a few hours. It was still back room to do some more repairs. An hour later I noticed the flashing lights of a know. Does other funny things too, all by OK when I returned, but rapid channel- itself. Even when I'm just changing changing made it go to standby. Most roadside assistance vehicle outside. When channels, it does things." odd. It was also very hot to touch. I listened at the curtained window I "Ah, an intermittent fault then." I dismantled it and checked the ESR of discovered that my customer had broken his key in the car door lock — and was "Precisely. My neighbour said it must the electrolytic capacitors in the power blaming me for his situation! be a 'soft-wearing bug'. So I got my supply. They seemed to be fine. But the I bolted my door, put the 'closed' sign magnifying glass out, the one I use for my multi-pin connectors on the power-supply up and went out the back way for lunch.

Photo 1: Multi-pin Remote-control extenders and connectors between cable systems the power supply Since repair work decreased some time and main PCB in the back I've been supplementing my income Panasonic TU- by selling accessories. One of the most DSB30 digibox. Also, the addition of popular is the Powermid XL remote- a miniature cooling control extender system. It consists of a fan to remove 'hot transmitter and receiver in the form of spots'. two small, black pyramids. They enable you to lie in bed and control the satellite receiver, DVD or VCR downstairs. I had one returned last week by an irate

428 May 2002 TELEVISION When it comes to remote-control If you have Eny questions extenders, you should be all right with an about SkyDigital problems or NTL box unless it's one that was originally from C&W. I do not know of Apple Mac computers, or need any universal remote-control units or spare parts for either, please extenders that can be used with a visit the web site at: Telewest or C&W box. The Powermid http://vvww.satcure.com remote-control extender system does work with the Scientific Atlanta CATV Information and spare parts converter Model 8602 that was supplied for analogue satellite receivers by NTL. can be found at The following notes explain the http://www.netcentral.co.uk/ difference with the IRDA remote-control satcure Photo 2: RF output connector for the system, which was chosen by some cable Panasonic TU-DSB31 digibox. operators as a high-speed approach that provides a degree of 'future proofing' in Information and parts for ICE customer as 'faulty'. If he'd told me what its design. The system was designed for (in-car entertainment) equip- he wanted it for I wouldn't have sold it to remote keyboard use (web browsing) and ment can be found at him in the first place. But he was a Mister to enable several handsets to be used http://www.satcure-focus.com Know-it-all, so I didn't bother to ask. In simultaneously, as required when playing fact he has a cable box that was video games. At some time in the near manufactured by Pace Micro Technology future cable operators may offer this for Telewest. feature. The cable digibox situation is a bit Conventional remote-control handsets the receiver to identify the handset. Each confusing. NTL took over the cable TV modulate a carrier (switch it on or off) key sends a seven-byte package of data distribution business of Cable & Wireless, which is normally in the range 35-60kHz. within 600µsecs (the time that it takes a though for a long time it looked as if The IRDA-standard system is designed to conventional system to transmit one or C&W would take over Telewest. enable computer peripherals to be linked two bits of information). The data is thus Anyway, the cable digiboxes currently without cables. Its use with digiboxes sent very quickly, freeing time for a around are: C&W (now NTL) Model should not be surprising, as modern second handset to jump in. The receiver DiTV1000; Telewest Model Di1000T; digital cable set-top boxes contain software also adds a time stamp to the NTL Model Di4001. powerful microprocessor systems. data, to enable a games programme to The C&W and Telewest boxes use Furthermore the Pace boxes were the first decide which handset responded first. The almost identical hardware though the to have an integrated cable modem within system and protocols used are covered by software differs. Both use an IRDA the box. The data transmitted by an IRDA patents. remote-control system and DOCSIS cable remote-control handset consists of In theory it should be possible to modems. The NTL box is somewhat discrete pulses of IR radiation, i.e. it's not devise a remoie-control extender that will different. It uses a conventional remote- carrier based. The pulse rate is work with this system. But, unless a control system and a DAVIC cable approximately 115kHz, and the handsets million people badger the cable operators. modem. have identification keys/tabs that enable I don't think it will happen. •

Test Case 473 his own. On a couple of occasions during the first two minutes of playback the counter stopped for a second or two, though the The Test Case workshop has recently been troubled by a bout of sound continued. So whatever was the cause of the problem, it 'bounced' jobs — ones that come back after a repair with further was sensitive to the type of tape in use. problems or, allegedly, the same problem. More often than not Using the customer's sample cassette, RT carefully watched these 'repeat faults', if they exist at all, are the result of neither the path of the tape across the ACE head while the fault was defective materials nor poor workmanship. present. It didn't deviate noticeably from the correct alignment, A typical example was the Panasonic NV-HD625 VCR, with but there was some upward movement in the picture-search hi-fi/Nicam sound, that had graced Real Technician's bench modes. RT made a mental note that a new pinch roller would be only a few days earlier. It had arrived in the workshop with the required, but that this probably wouldn't cure the problem. complaint `no sound', just that. RT had played a prerecorded The tape's back tension when running was next checked. RT tape, checked the E-E sound, and made an off-air recording. found that it was about normal, but also that increasing it a bit The VCR had passed all these tests. As RT had no luck with 'cleared' the fault, even with the sample tape supplied. several attempts at phoning the customer, he cleaned the heads Obviously the back tension couldn't be left at a high setting, but and returned the machine to the shop with a nominal charge. this was a useful clue: very often the effects of wear in the rotat- Now it was back again, with a card that said "same as before". ing heads can be masked by a high back-tension setting. But if But at least this time there was a mobile phone number for its this was the cause of the problem, what about the erratic tape- owner, which enabled RT to ascertain the real symptom. The counter operation? RT decided to check the tape path around the job card should have said "intermittent loss of sound, only dur- head drum, but discounted this factor as the fault showed up ing the first ten minutes of own recordings and happens only only with the machine's own recordings, with which slight mis- with certain tapes". A sample recording in the machine showed alignment errors would cancel during playback. that this did indeed happen. Maybe the control-track head was worn? Close inspection RT very quickly noticed that just before the hi-fi sound cut with a bright light and a dental mirror revealed some grooving out the tape counter froze, resuming its count a little before the here, but this didn't seem to RT to be excessive. Finally RT sound returned. This was strange! During the short period of no switched on his oscilloscope and actually found the cause of the count and no sound the picture deteriorated a little, though it fault. What was it? And did this machine actually get to be remained perfectly watchable. RT made a recording on a tape of repaired? For the answers, turn to page 433.

TELEVISION May 2002 429 Protech 7295 (Vestel 11AK12 Toshiba 2877 (C755 chassis) chassis) This set came in because it was dead. Some The cause of field collapse in this set was quick tests revealed that the HT voltage was traced to R818 (22W, 1W) which was low at 60V, but disconnecting the feed to the open-circuit. It provides the feed to the 33V line output stage didn't make any difference. tuning-voltage stabiliser and also the field Everything pointed to a defective chopper sawtooth charging capacitor. M.D. device, the STRS6709 chip Q801. I checked with Toshiba Technical who agreed that this Bush WS6671 was likely to be the cause and said that it is These widescreen sets are now just out of also important to replace D809 (part no. guarantee and some have come in with the 23316672), D813 (part no. 23316725) and symptoms dead with a ticking noise. On D804 (part no. 23316678). The part no. for every occasion I've found that the Q801 is 23905084. The set sprang to life BU2508AF line output transistor is short- once these items had been replaced. Thanks, circuit because C626 is dry-jointed. P.S. Toshiba. P.S.

Sharp 51AT15H Pioneer SV2801 (5BS-A chassis) The usual causes of intermittent loss of All this set produced was a snowy raster. It sound are poor connections at the speaker didn't take me long to find that there was no plug sockets or the earthing of the AM/FM 12V supply to the tuner, because R243 sound module. On this occasion however TV FAULT (5-6Q, 0-5W) was open-circuit. the fault was eventually cured by replacing It pays to replace C713 (1,000µF, 35V) the 17-7292MHz crystal QS46 (part no. in the power supply whenever one of these 266.407). B.F. FINDING sets comes in for repair. It's the reservoir capacitor for the -10V line, and can be Bush 1473T (11AK08 chassis) Reports from responsible for many faults with this The picture would sometimes become chassis. P.S. smeary or even black out completely. Michael Dranfield Prodding about anywhere near the CRT Philip Salkeld Bob Flynn Bush 2868NTX (11AK19-5 base panel would produce either symptom. chassis) The cause of the trouble was traced to the Martyn S. Davis Gary Laidler EW problems are quite common with these earth wire at PL901. Although it appeared to be well soldered, the wire was not M.J. Goodall Graham Richards sets. With this one the cause turned out to be C630 (470nF) - it's not the usual cause. making it through the PCB. B.F. Bob Dewis and Graham Boor Fault finding can be difficult without a circuit diagram. P.S. Hitachi C21 19T (G7PS chassis) We welcome fault reports from The BUT12AF chopper transistor Q903 and P6KE180A overvoltage diode ZD903 readers - payment for each fault is Sharp 66ES03H (CA10 chassis) This set produced only half the field scan. were short-circuit with the 6-852, 5W made after publication. See page The field output transistors Q501 and Q502 surge limiter resistor R901 open-circuit. 424 for details of where and how are surface-mounted FET devices: one of The most common cause of this is poor to send reports. them was short-circuit. I decided to replace solder joints at the chopper transformer them both (Q501 part no. RH- T901, either on the transformer itself or TX00171BMZZ and Q502 part no. RH- where it's soldered to the board. Resolder TX00172BMZZ), and also had to replace these before replacing the faulty parts. the 2-5mA circuit protector F601. Once this For a reliable repair the following Bush 1407 had been accomplished there was full troublesome components should also be This set wouldn't store channels. On scanning. P.S. replaced: R909 (39kQ), C906 (4-7µF, inspection I found that there was a small 250V), C908 (33g, 100V), R902 and spillage around the microcontroller chip Hitachi C32W5105N-311 R903 (both 82k52. 0.5W). B.F. IC602. Cleaning this up seemed to clear the This set was dead with the standby light fault, but the set came back a few days later pulsing. After some general checks, which Daewoo DVT1482P with the same trouble. Suspecting that proved fruitless, it was time to try The customer's complaint with this IC602 had been damaged I fitted a disconnecting the supplies to various TVNCR combi unit was no sound or replacement, obtained from a scrap set. But devices. I started with the field output chip, picture with a smell of burning. A good the fault was still present. I then found that which was OK, then tried the TDA7263M look around the TV section before the -30V supply to the memory chip was audio output chip IC4000. This was the switching it on revealed a hole in the side of low at -12V. The -30V zener diode and culprit - it was short-circuit between some the line output transformer. A replacement memory chip were both OK: the cause of of its pins. P.S. was ordered and fitted. Fortunately nothing the fault was C602 (1nF) which decouples else had failed. B.F. the zener diode. This small, green disc Philips 14CF1014 (CF1 chassis) capacitor was leaky. It was nowhere near This old set belonged to an elderly lady Amstrad CTV1410 (Onwa the area of the spillage, which was a red who wanted it repaired for sentimental chassis) herring. M.D. reasons. She assured me that it produced a A 'dead' Onwa chassis without the usual good picture. The fault was loss of field problems! The HT voltage was about 50V Philips 1.6.3 chassis sync, so I reached for the hairdryer and instead of 112V and there was no standby If the BU1508AX line output transistor freezer. This led me to C2377 (1011F, 63V), relay action. The relay is driven by Q610, Tr7906 is faulty, make sure that choke which is connected to pin 4 of the which was OK but wasn't being driven by L5420 in its base drive feed is not open- TDA2577A timebase generator chip IC7375. pin 36 of the microcontroller chip IC602. circuit. If it is, the replacement transistor A replacement cured the fault and she was R632 (331Q), the load resistor at pin 36 of will not last for long. M.D. right - it was a cracking picture. P.S. IC602, was open-circuit. B.F.

430 May 2002 TELEVISION Goodmans 336NS (F16 short-circuit. A replacement restored the and down. A small puddle of electrolyte chassis) set to life. M.S.D. led me to CO21 (22µF, 50V), which is Although this set worked there was a associated with the brightness output from strong smell of burning. It came from one Hitachi C2976TN (A5 chassis) the microcontroller chip IC001. The of the line output stage tuning capacitors, There were lines at the top of the picture. I capacitor read perfectly when checked with C134 (17.4nF), which is connected in found that the 44V supply from the line a capacitance meter, but a replacement parallel with a lower voltage rated 1•8nF output stage to pin 8 of the field/EW output cured the fault. G.L. capacitor. As I couldn't find a supplier for chip IC601 was low at about 25V. This a 17.4nF capacitor I replaced both suggested a faulty voltage-doubler circuit — JVC Cl4A1EK (MV chassis) capacitors, using values lOnF and 9.1nF D718/9 (BY33J) and C725 (33nF, 400V). This set produced a bright raster with with the working voltage uprated to 2kV. It's quite common for the diodes to fail, flyback lines. The obvious likelihood was The picture size and EHT were OK when but in this case C725 was open-circuit. that the supply to the RGB output stages the set was switched on again, and a long M.S.D. was missing. As usual, this is derived from soak test proved that all was well. B.F. the line output transformer. A check on the Tho mson 37MG73J (ICC9 rectifier circuit here showed that the fusible Philips 52ZY3535 (Anubis B AA chassis) surge-limiting resistor FR557 (47Q, 0.5W) chassis) How many of these monsters did we sell? was open-circuit. G.L. There was a blacked out screen with This one had a field scanning problem: the perfect sound and a faint smell of burning. picture was broken up, with folding Hitachi C21 19T (G7PS chassis) The picture was blacked out because there horizontal lines, from about mid screen to The problem with this set was intermittent was no field scanning. I found that R3452 the bottom. In a situation like this it's field collapse. I attended to the dry-joints (4.752) in the supply to the TDA3653B always wise to go for the obvious. So I around the field timebase chip IC601, field output chip IC7400 had burnt out. As replaced the TDA8177 field output chip R909 (39kQ) in the power supply (error- no shorts could be detected, I fitted a IFOI and anything around it that looked sensing network) and two power supply replacement and tried again. This time like an electrolytic capacitor. All to no capacitors, then put the set on test. After R3450 (3.9Q), which is in series with avail. It was time to get serious and use the about half an hour the field collapse was R3452, failed. All was well once R3452 scope. back. Flexing the board restored the and IC7400 had been replaced. B.F. IFOl's input waveform, at pin 1, was of picture, and more dry-joints were dealt the correct shape but had a serious, ringing with. But, after much head scratching, the Sharp 66E5-D7H (DA100 distortion on it. The output waveform, at cause of the trouble turned out to be the chassis) pin 5, also had this ringing. The drive 1N4002 flyback boost diode D601. It was There was sound but no picture, because comes from pin 16 of IVOL Was this chip going open-circuit intermittently. G.L. of field collapse — a thin line could be seen faulty? There is feedback from the scan- across the screen. In this chassis IC501 coil circuitry to pins 17 and 18 of IVO I. Alba CTV3458 provides the field scanning. It receives a Scope checks on the feedback waveforms I've had three of these sets in recently, all I3V supply, which is obtained from the revealed the same ringing. Suspecting that with the same fault. The sets were dead rectifier circuit D609, F602 and C616 in the problem was being caused by line with the mains fuse blown. In each case the the line output stage, at pins 14 and 16. It signal that wasn't being filtered out, or culprit was C8 (1nF, IkV), which produced was tempting just to replace the IC, but some sort of HF instability in IFOI, I a reading of just a few ohms. G.L. we've no record of failures here. A check switched the set off and started to check all on the 13V supply revealed that it was low the resistors in this area, especially low- Sony KVM2171U at 8-9V. There was no difference when value ones. Sure enough RF11 (1-5Q) was (BE4A chassis) IC501 was disconnected, so I starting to open-circuit. It's part of a filter network at There was 1 ield collapse, and a quick look at the smoothing capacitors. IFOI 's output, and a replacement cleared check showed that the field output chip's C616 measured low in value, but a the fault. Amazing that such a small supply was missing. Further checks replacement made no difference. A look at component produced such a dramatic brought me to R814 (0.47Q) which was the circuit diagram showed that the supply effect on such a big set! Incidentally RF11 open-circuit. No cause of its demise could arrives at IC501 via L502, with C501 is a critical safety component, part no. be found and a replacement restored the (4701.tF, 25V) for smoothing. This 15022560. M.S.D. picture. G.L. capacitor measured correctly, but a replacement restored the correct voltage Akai CT2862UNT Goodmans GTV9200 and the scanning. M.S.D. This set was Nought in because of field The symptoms with this Sin, mains/battery collapse. Rectifier 13406 (BA157) was portable were loss of the picture, which Ferguson Fl4VB12A short-circuit, R422 (0.68Q) was open- might return when the first anode voltage We'‘ c had several of these TV/VCR circuit and the TA8427K field output chip control (part of the focus pack) was combi units with the complaint intermittent IC401 had failed. All probably because moved, or the brightness varying as the set loss of sound. In every case the cure has C401 (100pF, 35V) was open-circuit. warmed up. They would suggest that the been to replace the switching chip IS001, M.S.D. focus pack was faulty. In fact the culprit part no. 101-22-010. M.S.D. was C801 (2.2nF, lkV), which is mounted Bush 2863NTXA (11AK12 on the tube base PCB. When it was Orion TV705R chassis) checked out-of-circuit its capacitance read This 14in. set was dead with no front The problem with this set was field correctly, but its DC resistance had fallen LED light. When I removed the back I collapse. As I didn't have a circuit diagram to 500MQ — just enough to upset the action found some sort of Philips chassis, with a I carried out cold checks in the field output of the A 1/focus supply chain. M.J.G. power supply based on the TDA4605 stage and found that R818 (22M) was chip. Close examination revealed a open-circuit. G.L. Sharp 66ASO5H (4BS-C continuous ticking sound. So it seemed chassis) that the power supply was in the Sony KVM2141U Someone had fitted the wrong line output protection mode, and I decided to check (BE2A chassis) transistor (Q600) in this set. It should be whether the line output transistor was OK. This set produced a fading picture: it was type 2SD1546, but an S2000AF had been Good guess: the BUTI1AF transistor was as if someone was turning the contrast up installed. Well, they are shown together in

TELEVISION May 2002 41 an equivalents book. But the set had control unit works for TV but not for the worked for only three days, and the De Graaf D51KS4D VCR commands. Every time the remote- replacement transistor was very cooked An inspection ot the chassis showed that control unit has been defective. The keys and short-circuit. The 2SC2271 driver there were a number of faulty electrolytic still transmit signals, but maybe the transistor Q601 and 2SC2412 pre-driver capacitors. Once they had been replaced frequencies have shifted. The handset is transistor Q606 had also failed. the set was still stuck in standby. I found reasonably priced, the Philips part no. Correct replacements were fitted, but the that the optocoupler D315 was faulty. It's a being 4822 219 10593. G.R. set still wouldn't start up. A check at pin 12 CNY75, but a CNX82A will do. G.R. . of the MC44002P colour decoder/timebase Samsung CI5937AN (Z68 generator chip IC800 revealed that the line Bush 2857NTX chassis) drive output was at only 1V instead of 3V The fault description read "RGB fault". You can get the following symptoms with peak-to-peak. I didn't have an MC44002P in There was a blank green screen, which was these sets. At switch on there is no picture stock but I did have an MC44007P, whose put right by replacing Q555 (2SC1815) because of low heater voltage. After about pin connections are identical. Being bold and Q552 (2SC2482). But the picture that five minutes the picture appears, but with (occasionally), I decided to try it. This paid was no w displayed was weak and milky. lack of width, very jagged verticals and an off: the set worked perfectly and, many An over-sensitive beam limiter perhaps? I arcing noise from the line output weeks later, is still doing so. Since IC800 telephoned Bush Technical and was transformer. The transformer is not the had been faulty, with a low line drive output, advised to check R433. It should be 150kO cause: the item to replace is the HT an S2000AF might have worked after all. but read open-circuit. A replacement put reservoir capacitor C828 (470µF, 250V), G.R. matters right. Thanks Bush! G.R. which goes open-circuit. B.D.

Grundig S163-725/8/FT/GB Toshiba 2805DBT Sharp DV3761H (4BSA (CUC6330 chassis) If there is distorted field scanning/ foldover chassis) This multi-standard set mislead me briefly. with lines across the screen, look for C372 The job sheet said that the picture would It produced a negative-looking picture, and C317. One is near the TDA8170 field close in or stretch at the top. I replaced the which made me think there was video output chip and the other near the EEPROM chip, reset all the usual overloading. In fact the set was working to TA8739P field generator/EW correction parameters and left the set on test. All the wrong standard — I think it was in the chip. They are the only two red seemed well for a few days, then the fault Secam instead of the PAL mode. The electrolytics on the chassis, and both are reappeared. After a lot of headscratching the picture was OK with a scart video input. 2.2µF, rated at 50V, 105°C. They also tend cause was eventually found: the field ramp Use the remote-control unit's P/C key to leak electrolyte. G.R. charging capacitor C512 (82nF), which is to get the user menu, then set the standard connected to pin 6 of the MC44006 jungle (S) to number 2. Use the OK key after each Philips 14PV2841/05S chip IC801, was intermittent. A operation, otherwise the new information We've had a number of these televideo replacement, followed by a further soak won't be stored. G.R. units with the problem that the remote- test, proved that all was now well. G.B.

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432 May 2002 TELEVISION TELEVISION INDEX 8t DIRECTORY 2002 Answer to Test Case 473 Plus hard-copy index and reprints service - page 429- Here's the essential repair information you need! The Though intermittent in their effect, the causes of the Television Index & Directory 2002, in CD-ROM form, problem in Real Technician's bounced Panasonic NV- contains the text of over 14,000 high quality fault reports on HD625 VCR were to do with part parameters. The main TVs, VCRs, Camcorders, DVD players, Monitors, Satellite TV cause was control-track head wear: its output, with a units, Audio equipment and CD players, searchable by make signal impaired during the record phase, was borderline, sometimes insufficient to trigger the tape-counter and and model, plus the text of 168 Test Cases and over 200 operate the servo-control action. The initial effect on major servicing articles, from fourteen years of Television tracking was minimal, insufficient to have much effect magazine. It also contains a full fourteen year index of on the video playback but enough to reduce the level of Television, a Spares Guide, a directory of Trade and the off-tape hi-fi stereo sound carriers to below the Professional Organisations, an International TV Standards muting threshold. The rotary heads were also worn to some extent. This machine had plainly seen quite a lot guide, a satellite TV Channel Finder, a TV transmitter list and of use during its four and a half years' life! a compendium of internet resources for service engineers. The All this investigation had taken up quite a lot of time software is quick and easy to use, and runs on any PC with - the £15 paid by the customer for the previous check Windows 95, 98, ME, NT or 2000 had long since disappeared in terms of a fair labour charge. If only people (and shop-floor staff) would sup- ply accurate and concise fault descriptions! RT had to Television Index & Directory 2002 CD-ROM, £199 quote for a new ACE head and pinch roller, their fitting and alignment, and point out to the customer that the Television Index & Directory 2002 CD-ROM upgrade, £46 prognosis was not good in view of the degree of rotary- (to qualify for this upgrade you need to have purchased a head wear present. The result was almost inevitable: the previous version of the Television Index on floppy disk or on job was not sanctioned. And the customer tried to get his CD-ROM) £15 back! No chance!

A six-month update of the index and fault reports will be avail- able in May 2002. If you wish to take advantage of this, £10 should be added to a full update order. NEXT MONTH IN TELEVISION Television Index only, 1988 - 2001, £36 Servicing the Sony AE I C chassis Television Index only upgrade from previous versions, £16 The Sony AEI C was the last of the AEI series chassis. It was used in a number of models released during the 1991- 2 period. John Coombes provides a fault-finding guide. Hard-copy indexes of Television magazine are available for Volumes 38 (1988) to 51 (2001) at £3.50 per volume. Test report: the Hauppage TV add -on for PCs The Hauppage WinTV Nova-t unit plugs into a PC's Reprints of articles from Television back to 1988 are also USB port and takes an input from a TV aerial. You can available, at the flat rate of £3.50 per article - you can order then view all the free-to-air terrestrial digital TV channels — and hear the radio channels — via your through our web site, or write to the address below. computer. You can also record programmes. It's pretty good, with a few wrinkles. Peter Marlow uses one and The above prices include UK postage and VAT where provides a detailed test report on its performance and applicable. Add an extra £1 postage for non-UK EC orders, operation. or £5 for non-EC overseas orders, although Channel Island

Home networlcing residents do not need to add any extra postage. Cheques should be made payable to SoftCopy Ltd. Access, Visa or Mark Paul provides an update on the 'intelligent home', covering the latest technology in this field. The three MasterCard Credit Cards are accepted. Allow up to 28 days approaches — use of existing wiring as the transmission for delivery (UK). medium, installing new wiring, and RF techniques — are covered. SoftCopy Limited,

More on the Mitsubishi TFS6705K monitor 1 Vineries Close, Cheltenham, GL53 ONU, UK Next month's instalment will concentrate on the power Telephone 01242 241 455 Fax 01242 241 468 supply, including the arrangement for varying the HT feed to the line output stage to cater for different display e-mail: [email protected] site: standards, and the separate EHT system. http://www.softcopy.co.uk

Published on the third Wednesday of each month by Highbury Business Communications, Anne Boleyn House, 9-13 Ewell Road, Chearn, Surrey SM3 8BZ. High- bury Business Communications is a division of Highbury Communications PLC. Filmsetting by G&E Al Parkway, Southgate Way, Orton Southgate, Peter- borough PE2 6YN. Printed in England by Polestar (Colchester) Ltd., Newcomen Way, Severalls Industrial Park, Colchester, Essex CO4 4TG. Distributed by Comag, Tavistock Road, West Drayton, Middlesex UB7 7GE (tel. 01895 444 055). Sole Agents for Australia and New Zealand, Gordon and Gotch (Asia) Ltd.; South Africa, Central News Agency Ltd. Television is sold subject to the following conditions, namely that it shall not, without the written consent of the Publish- ers first having been given, be lent, resold, hired out or otherwise disposed by way of Trade at more than the recommended selling price shown on the cover, exclud- ing Eire where the selling price is subject to currency exchange fluctuations and VAT, and that it shall not be lent, resold, hired or otherwise disposed of in a mutilated condition or in any unauthorised cover by way of Trade or affixed to or as part of any publication or advertising, literary or pictorial matter whatsoever.

May 2002 TELEVISION 433 To reserve your web site space telephone Tel: 020 8722 6028 Fax: 020 8122 6060 SERVICE E-MAILS [email protected]

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TELEVISION May 2002 435 SATELLITE NOTEBOOK

more. If the tuner is faulty you will usually transponder D4S (11•527GHz vertical). find that the Q (quadrature) output is See Photo 4. They can be added using the missing. digibox Add Channels facility, and are These tuners can be repaired by Kesh currently listed as aol, atn, atl and sc in the Electrics, 6-8 Main Street, Kesh, Co. list of channels found. See Photo 5. C.H. Fermanagh, N. Ireland BT93 1TF. The turnaround is extremely quick, and I must say that proprietor Gordon McCrea is one of the most helpful people I have ever come across. The above note applies to all models BBC Four begins at 7pm that use the zero IF tuner, including the 2500B. M.D.

Digital channel update Reports from The latest channel changes at 28.2°E are listed in Table 1 - where allocated, the Michael Dranfield and EPG number is shown in brackets after the Christopher Holland channel name. Photo 2: BBC4 opening. Gaydar Radio and Teamtalk Radio, both mentioned here last month, have been Pace ZIF tuner module allocated numbers 908 and 910 A common problem is "no satellite signal respectively in the Sky EPG. They are received". If you go into the services menu both received via transponder 33. 111111111111111101 and select signal test, the display will BBC Knowledge, EPG number 573, Steed by for th usually show that the signal strength is OK has ceased transmission and been replaced 'tattoo fog 32 year but no signal quality and no lock. by BBC4, EPG number 161. See Photo 2 conic enets. 6 Musk launches right bro n n 11 M onth An oscilloscope check with the digibox BBC6 Music, EPG number 911, has running will confirm whether the tuner is started via transponder 3. A promotion ran faulty. When the test points identified in from March 8-10th. See Photo 3. NOW BBC lc: Photo 1 are checked with the scope you Various tests with four Arabic channels should see an analogue signal of 400mV or are being conducted via Eurobird

Photo 3: BBC6 promotion. Table 1: Latest digital channel changes.

Channel and EPG Sat TP Frequency (GHz)/pol

BBC4 (161) 2A 1 11.719/H BBC6 Music (911) 2A 3 11.798/H ESPN Classic 2B 33 12-344/H Family Radio (909) 2B 33 12.344/H Motors TV (429) EB D4S 11-527/V Shop on the Box (652) EB D5S 11.546/H

Quantum EB 011S 11.662/H 4: al—Thalitha No Video TP = transponder, 2A = Astra 2A, 2B = Astra 2B, EB = Eurobird.

Photo 4: Arabic channel testing via Eurobird. _g_cm 112-0141101 %icy 11.53eierca mit • e I+ output gu'de NE W CHANNELS

Q. output lloosasCook Q+ output b31 I- output ---- '.,-•,..... !,

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, •- ,,,, ii.:1,4•,,i pil.'1•149' a -se (idi- ot— Ale Photo 1: Pace ZIF tuner 1..1 .. rel L IV e—'4 1 0111- 1 411 ... e C. • V module outputs in C42. . • j• • , , . -.- ••• - digibox Model 2500B. Photo 5: Add Channels for transponder • • 11 Ill 1 ' l i e b t i l l t D4S.

, May 2002 TELEVISION Aiwa MX-Z9300 Mk II problem being the ribbon cable that I've had two of these units with an connects the laser to the main PCB. I.L. identical fault: there were popping sounds, then the unit went dead. The solution is to Sony PCM2500 remove the main PCB from the chassis, The complaint with this professional which is not easy, and resolder every joint DAT recorder was glitching with the that looks suspect. Pay special attention to green and red error lights coming on. I all power transistors and ICs. You will found that the amplitude of the RF find that all is well once this has been waveform was pulsing up and down. done. M.M. Close inspection of the deck revealed di r t on the capstan shaft. The cure was to Sony LBT-X1320 clean the shaft thoroughly. I.L. These monster stack systems look to me like a cross between the dog robot K9 and Technics SE-CA01 Darth Vader's helmet, but they provide a This is the amplifier section of the CA01 regular source of work. The usual system, which has a metal-boxed symptom is a `no disc' display. The CD amplifier section right next to the unit, a five-changer carousel affair, is at transformer — hardly audiophile stuff. The the base of the stack, and dust ingress to fault was reported as one channel being the laser assembly is a constant problem. very quiet. I traced the cause to a dried up To reach the laser assembly is no mean DC blocking capacitor, C205 (10g, feat. Remove the case/cover first. Then, 16V), in a preamplifier stage. This seems after detaching all the cables/connections like bad design: surely everyone knows AUDIO from the power panel, I remove the power that you don't pass audio signals through supply complete with its supporting an electrolytic capacitor, because of the chassis. Be careful about this, because it's poorly-defined frequency-response quite heavy and has sharp edges. Give the characteristics? The owner told me that FAULTS carousel and laser assembly a thorough the unit had cost some £00, so this lack clean — I remove the carousel. Once you of attention to sound quality was Reports from have completed the cleaning you will find unforgivable. But the system does have that the unit works normally. D.G. Michael Maurice flashy displays and lots of buttons to press! C.McC. Dave Gough B&O Beomaster 3300 (type 2952) JVC XL-EX70 Mark White the reported fault was very low sound, This is the CD section of the CA-EX7OR and I found that the volume control made Ivan Levy, LCGI system. It was completely dead, with no no difference past number 10 on the outputs from the power supply. The cause Colin McCormick and indicator. With the aid of the service was R111, which is in one leg of the AC manual I located the IC for the volume feed to the mains bridge rectifier. It was Geoff Darby control stage, IC6. Some quick checks at open-circuit. As cold checks failed to its pins showed that there was no voltage reveal any reason for its failure I simply at pin 1 instead of 16V. The cause was fitted a replacement, which restored full, C92 (10011F, 25V), which was short- normal operation. A long soak test circuit. There were normal sound levels confirmed that there were no other once this item had been replaced and the problems. G.D. unit had been reassembled. M.W. Sony MI-E60 Peavey C58005 This personal MiniDisc player wouldn* t This amplifier was brought in because read discs. A replacement laser unit. channel 1 wasn't working. After extensive which is very easy to fit, was required. tests on the transistors in the output stage I Removal of the door gives access to the found that the protection relay was in top of the deck, which is secured to the operation. No shorts or leakage in the body of the unit with two tabs that engage output transistors or associated devices in slots at the right and one screw at the were detectable however. When I carried left. The deck can be lifted right out once out voltage and resistance measurements the flexiprints have been released. in the protection circuit I found that the When the new laser unit had been thermal resistor R207 was open-circuit. fitted and the unit had been reassembled I It's on the heatsink. A replacement cured ran the automatic set-up program. To do We welcome fault reports from the fault. I.1,. this you use two test discs in sequence. readers — payment for each fault is They are expensive, but if you want the Denon DCM270 made after publication. See page auto set-up to proceed without problems I've had several of these CD players that there is really no alternative. The discs can 424 for details of where and how cut out or stop playing after several tracks. be obtained from Sony, and can be used with to send reports. The laser is usually OK, the cause of the other units in the MZ-xx range. G.D. •

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properly in place, and whether a scart lead At this point I turned my attention to was fitted (no), then switched the TV set the VCR, which was a Mitsubishi HS- on. After a few seconds a snowy raster 761V(B) that seemed to be in good appeared, with three pairs of red, green condition. But it refused to accept a and blue horizontal lines across the centre cassette, and when I removed the top cover of the screen and the top, right-hand- I found that the plastic tracks for the LETTERS corner channel graphic rolling quickly cassette tray had broken away (no bits upwards. When I asked for the remote- inside the cabinet!) while the right-hand control unit I was given what appeared to side panel of the tray was also damaged be an elderly Mitsubishi one which didn't (there was no cassette door release lever). A scam work. I then tried a Mitsubishi remote- For good measure the remote-control unit After more than fifty years in the trade control unit of my own. I knew it was OK, that had been supplied was not even a people continue to amaze me. An old but this didn't produce any results either. Mitsubishi one. customer of mine, a local businessman, The results so far suggested an At this point my customer returned to find out how I was getting on. I had a few phoned me a couple of evenings ago to ask EEPROM failure, so I had the main room for help. He had bought "a new 33in. TV lights turned on and paid closer attention questions for him! It transpired that as he set and video recorder" and couldn't get to the set. As I turned it and its stand round was finishing up at a job (he's a builder) and reloading his van a wagon drew up in them tuned in. Would I help? I had I noticed that the silver finish was of poor finished for the day and had nothing quality, and as soon as I got a clear look at the road. The driver had asked him if he further planned, so I agreed to call round the rear of the cabinet it was obvious that wanted to buy any TVs or videos, as he in the next hour or so to sort him out. In the set had been inexpertly resprayed — had a failed delivery that was being sent these days of cash-and-carry deals and without masking off the maker's label or back to Ireland. He had jumped at the chance of a 'bargain' and, for £.00 cash- complex setting-up menus this kind of job the scart, phono or aerial sockets! I is becoming very common, especially decided to remove the back cover to in-hand, had bought a "33in. widescreen when a houseful of sets and 'boxes' have establish the make and model number. CTV and a matching Nicam-stereo Video Plus VCR" — unseen, no boxes, just to be persuaded to work together in Only six of the nine back screws were in covered with plastic bubble-wrap. The fact harmony. place: when they had been removed it took On arrival I was shown into the lounge, some further levering to free the back, that there were no user instructions, and where the new purchases were on proud which the respray had firmly cemented to that the two remote-control units had come display — a large-screen TV set in a silver the front. The interior of the set resembled from a box of assorted handsets in the cab cabinet on a black metal stand, and a a well-filled Hoover bag, and the label that of the lorry, had apparently not rung any Nicam stereo VCR in a graphite-coloured adhered to the CRT flare told me that the alarm bells. case on the shelf below. I felt behind to set was a Mitsubishi Model C28S7B I had trouble keeping a straight face as I check that the aerial and RF leads were (about seven-eight years old?). explained to him that his 33m. TV was actually a resprayed eight-year-old 28in. black-cabinet set with a major fault, and The pay-TV problem that the VCR was of similar age and had It's my opinion that both ITV Digital and Sky Digital have made fundamental errors major damage which was probably in their approach to selling their services. The packages on offer are daunting in unrepairable. This model doesn't have a their complexity. Pay a for x months and you get m + n + p, then it becomes pay a + complete cassette-lift subassembly that can b + c to get m + n + p and lots of channels that nobody wants, and if you sign up on be replaced: the side panels of the cassette a Wednesday between 11 am and 2.30 pm you get a half price installation with a lift are extensions of and part of the main free trip to Switzerland in November on Freddy Laker Airlines. chassis pressing, and replacement plastic If TTV Digital had offered football on its own at say £10-£12 a month, it would side tracks (like those made for Philips have had its five million subscribers by now. All packages offered should be simple, Charley decks) do not seem to be available. and it should be easy to get your preferences separately. The 'dross' channels would I still cannot understand how a soon disappear, which couldn't be any worse than the usual cost-cutting exercise of 'successful' trader could have allowed job losses. himself to be taken in so easily. He had Keep it simple, so that the viewer can budget, and there could still be a future for actually considered buying another set, a ITV Digital. The number of people cheating with pirate cards proves this. Sony, on behalf of a friend. I wonder how Cyril Randle, many more people were taken in that day, Orchard Hills, and how widespread this racket is. He Walsall. hadn't even made a note of the type and registration number of the lorry, nor of any

438 May 2002 TELEVISION side-panel graphics. I'm afraid that my sympathy didn't extend to waiving my call-out charge. To add to his woes, as I left the house his wife was giving him a A home-recorded disc problem good earbashing. Over the past couple of years I've noticed an ever-increasing tendency for hi-fi John C. Priest, equipment fitted with the stacking type of multichanger to come in for repair with Thornton, Blackpool. discs stuck inside. When you get it apart, you invariably find a home-recorded disc at the root of the jam up. Many CD burners purchased for domestic PCs come Phone technology complete with ripper software — if not it can be freely downloaded from the net. So In his April column Jack Armstrong said Johnny hi-fi owner starts copying all his friends' best discs. Flushed with success, that in the early days of the telephone he then just has to get cute and buy some label printing software and cheapo labels designers introduced an electronic voice from his local PC superstore. A quick scan of the original disc, print out later and feedback system from the mouthpiece to hey presto! a pretty fair clone has been produced. the earpiece so that the user would hear The trouble starts a few weeks later when the edges of the label begin to peel. his own voice in the earpiece and The underside, now the top side for a short distance, is still sticky enough to grab therefore talk more softly. on to anything with which it comes into contact. This is often the tray, or some This is not quite accurate. Very early other piece of mechanism, immediately above it. So, when the mechanism comes telephone circuits consisted of a carbon- to change, the tray is retracted but the disc stays where it is, ready to graunch up granule microphone 'transmitter' and a when the mechanism tries to ram the next tray in. I have known this to result in moving-diaphragm earpiece in series with power supply as well as mechanical damage, and often severe scratching of the a DC supply (provided by the telephone disc. exchange), a similar arrangement being Whenever one of these units comes in — Sony, Technics, Sharp, Sanyo — it's used at the other end of the line. Because worth warning the owner about this, even when the fault has not actually occurred. people could hear their own voices at Single players and carousel types are generally not affected, as the vertical quite a high level through the earpiece, clearances are much greater. they tended to talk too quietly. Designers Geoff Darby, Monitech, introduced a simple transformer Earls Barton, Northampton. arrangement to feed the microphone signal back to the earpiece out-of-phase, so that the user would hear his own voice at a TX100 for the rubbish they are. 21-34) channels at high power and much lower level and therefore speak up. I sold a 32in. Toshiba set to a good Channel 5 somewhere in group E (chs. 34- This arrangement was known as the anti- friend of mine who uses it with a Sky 68) at lower power, with digital sidetone induction coil (ASTIC for short). digibox and a DVD player, and cringe multiplexes all the way from one end of I was an apprentice engineer with the every time I visit him because the picture the band to the other at various power GPO (as it then was) in the Sixties and, is so awful. I still use a Philips System 40 levels. Signals that are transmitted using with today's technology, would have receiver as my own set at home. When the the highest channel frequencies often thought it possible to design a mobile broadcasters choose to transmit a good arrive at an alarmingly lower level than phone so that people could hear their own unprocessed signal the picture is truly the others, even when the transmitted voices through the earpiece. There's stunning. power is the same, because of the greater progress for you! I think the reason people buy the effect of signal screening at high Martin McCluskey, current widescreen monstrosities is not frequencies. Thornahv, Stockton on Tees. because they provide a good picture but As Roger discovered, the imbalance because of the cabinet styling, to impress can be a real problem when the signals Poor pictures their friends. OK as long as they don't need to be amplified for distribution I was as astounded as Chris Cory (letters turn the TV set on during a visit! purposes. A large distribution system will March) to read the previous letters praising David Huddleston, have individual filters and levellers for stunningly-good pictures with modern sets. London W2. each channel. This usually enables the My experience of widescreen sets has been problem to be solved by adjusting a few awful: plastic-looking faces, poor definition Channel balancing presets, though in an extreme case extra and unacceptable geometry. Roger Bunney's description of a grouped amplification may be needed for the I had been in the TV trade for twenty channel-balancing system (April issue, weakest channels. The problem is more two years until I left to work for a London page 356) highlights a problem that has difficult with small systems, where the local authority. When I was seven years become very common over the last few cost of channel-pass filters for five old I used to make my own radio sets and years — the imbalance between signal channels and six digital multiplexes is not amplifiers. From fourteen I worked in a levels received in different parts of the warranted. TV shop, repairing Bush 141s, Thorn UHF band. We are now in the era of Roger's solution, the use of a diplexer 2000s etc. — I was really keen. But during wideband reception, with signals — to provide separate high- and low-band the last five years I've become very analogue and digital — available at many signal paths, with attenuation in one path, depressed and disillusioned with the whole frequencies across virtually the whole has worked quite well for us but has its trade. When I was running my own shop, limits. Because the diplexer doesn't band, from channel 21 to channel 68. A which I sold as a going concern, in perform perfectly in creating the two common situation seems to be that the Norwich I regularly had to send brand-new signal paths, especially near the crossover lower-frequency channels are TV sets with digital signal processing back point, the signal phase relationships at the inconveniently strong in comparison with to the manufacturer: the picture quality combiner can produce a strange response was so poor that you couldn't have them those at higher frequencies, as in the case pattern, with peaks and troughs. Since described by Roger. Since cable losses are on if you had a used or good-quality digital multiplexes must be reasonably flat analogue set on in the shop at the same greater at the higher frequencies, the across their 8MHz bandwidth, problems time. When we had new sets in for repair, opposite situation at the aerial terminals can arise. If these effects cause a problem perhaps running on soak test waiting for a would often be more helpful. with one particular analogue channel once-a-week fault to appear, they would All over the country there are however, the length of one or other of the often be shown up by an old set such as a transmitters that radiate four group A (chs. paths can be altered on a trial-and-error

TELEVISION May 2002 439 the filters cost about £18 each. For the basis to provide compensation. band. Somehow I don't think we shall ever see such a product. More feasible time being however, until something On one occasion where a good group-A better turns up, this is the solution we've aerial was in use I experimented by adding would be a masthead amplifier with a gain of say 3dB in ch. 21 rising steadily to adopted. a group-E array with an extra amplifier, Perhaps someone out there could using a diplexer to combine the signals. 16dB in ch. 68. I've mentioned this idea to design a simple circuit with the following The phasing problem just mentioned was representatives from Labgear and performance: through loss in channel 21 much in evidence, and in addition the Antiference with no result other, I suspect, than a significant tapping of the forehead about 14dB, dropping evenly to 2dB or overall polar response of the two arrays less in ch. 68, with accurate impedance was seriously affected. In other words it after they'd gone. matching and low VSWR across the band. was a disaster! Equalisers or 'slope filters' are available of course, but all the ones I've Any volunteers? What's needed is a 'magic' wideband Bill Wright, tried provide only 6-7dB of equalisation aerial, with much more gain at the top of Micklebring, Rotherham. the band than the bottom but good across the UHF band. Two such equalisers [email protected] directional characteristics throughout the can be cascaded, but this isn't elegant and

The help wanted column is intended to assist readers who require a part, circuit etc. that's not generally available. Requests are published at the discretion of the editor. Send them to the editorial department — do not write to or pnone the advertisement department about this feature. wfituriEn Suffolk NR33 8AW. Phone 01502 512 Wanted: EHT/focusEP lead for the Fidelity unit, various ICs and circuit diagrams. 695. Model WSTV3132NF. All expenses paid. Will accept any reasonable offer. Buyer to collect (from Hanham, Bristol). Phone Wanted: Help with an LG Electronics G. Smith, 83 Avenue Vivan, Fence VCR, Model W9061. There's no record- Houses, Tyne and Wear DH4 6HZ. Phone George Baker on 0117 967 1312 or e-mail ing despite the red circle logo on display. 0191 385 8328 or 0790 423 4301. [email protected] Wanted: Manual and circuit diagram for Any clues as to what to do or replace? Wanted: Circuit diagram or service man- Please e-mail Jack Detsios on ual for the Philips PM5509 colour pattern the Hameg HM203-5 oscilloscope. Will [email protected] generator. David H. Syddall, Watson pay expenses. Phone Martin Scobie on Wanted: Some 6.4mm (0.25in.) tape on House, Moorside Road, Edgworth, 01803 293 157. 10in. reels to enable me to service/repair a Bolton, Lancs BL7 OJY. Phone 01204 853 Wanted: Service information for the JVC HR-C3EK battery VCR. It won't latch on. Revox tape recorder. Does anyone have 413. such tape available or know of a possible For disposal: An early 26in. Philips Also I have an Akai VS23EK VCR which source? Please write (I'm hard of hearing) colour TV set (G8 chassis) in good work- works well except that when play is to Ian Johnson with price, amount avail- ing order. Purchased in January 1972. selected L appears in the display. Is this a parental lock? I have no instruction book able and how to pay for it. Address 6 Original bill of sale from the Philips Staff Heathfield Crescent Kidderminster, Shop, Mullard, Mitcham available, also or remote-control unit for this machine. Worcestershire, DY11 6PF. installation instructions and a fault loca- R.K. Drew, 76 Laburnum Avenue, Wanted: Circuit diagrams for typical tion guide supplied by Combined Taverham, Norwich NR8 6JZ. Phone domestic radio sets (not TV) from the Electronic Services Ltd., Purley Way, 01603 261 073. 1940s to the 1980s. This is for an HMP Waddon, dated May 1971. If any collector Wanted: For spares, Quad 405 power group educational project on past technol- or museum of working TV sets is interest- amplifiers, Quad FM3 tuners and Quad 33 ogy. If you are disposing of old data ed in providing a home for this set, please and 44 control units. Also require Spendor please send to me and I will forward. contact Mick Scholes on 020 8660 7039 BC1 speakers. Phone Mike on 01758 613 Roger Bunney, 35 Grayling Mead, (phone/fax). 790. Fishlake, Romsey, Hants S051 7RU. Wanted: ACE unit for a Sony SLC9 Wanted: Circuit diagram for the Philips Phone 01794 517 497. Betamax VCR. Phone Steve Rowley on G2.1AA chassis; keyboard for the Sinclair Wanted: Service manual for the Ferguson 01889 578 416 or e-mail 128K, Amstrad part no. ESU2456; and an FV59S VCR (photocopy OK). Rod Tyler, [email protected] old Commodore 64 keyboard or a com- Tyler TV, Littlecote Estate, Petworth Wanted: Circuit diagram or service man- plete unit for spares. Donald Bills, 46 GU28 OEF. Phone/fax 01798 342 210 or ual for the Blaupunkt car radio Model Blewitt Street, Pensnett, Brierley Hill, Montreux RDR49. Will pay all usual Dudley, West Midlands. e-mail [email protected] expenses. Phone John Cousin on 020 Wanted: Line output transformer for an Wanted: CRT projection 'gun' for a 8340 6896 or e-mail Aiwa 14in. TV/VCR combi unit. [email protected] Unfortunately only part of the model Pioneer SDT5000 rear-projection TV set. For sale: Grundig 28in. TV set (CUC720 number is available, VX-T, but the num- A. Robinson, 24 Eastfields, Stanley, Co. chassis) with teletext and original 400TT bers on the transformer are Philips 20111 Durham DA9 7DH. Phone 01207 290 387 (daytime), 01207 282 340 evening). remote-control unit, working and in very OP441 3213006. R. Thomas, 80 Dynevor good condition. Owned and maintained by Road, Skewen, Neath SA 10 6TW. Phone Wanted: A Philips Gil TV chassis, engineer from new. Comes with the fol- 01792 510 467. working or not. Will pay a fair price and lowing spares: ROB and text PCBs Wanted: Power supply panel for the Akai all expenses. Peter Ward, Petgra, Forest (29504-005-21 and 29504-018-01GB), VS-A60 VCR. Ian Howes, 10 Munnings Corner, Ringwood, Hants BH24 3JW. relay, scan coils, spare remote control Close, Carlton Colville, Lowestoft, Phone 01425 475 445.

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DIGIBOX REPAIR Fryerns TV/VCR CIRCUITS SERVICE SKY CENTRE Service Circuit OPEN (WE DO NOT STOCK Information FES Diagrams Same day collection. 6 DAYS AUDIO OR MONITOR MANUALS Large stocks of refurbished INFORMATION) Have you ever turned away work TV's, VCR's SATELLITE boxes. for want of a Service Manual? From £150 - call for details TEL A.T.V. on AUDIO & HI-FI Have you ever bought a Service Most Models Covered SERVICE DEPT 0114 285 4254 Manual and never used it more Prices are from £4.75 + £2.75 P/P S.D.S 01237 425999 / 470333 than once? SAT CTV Circuits £5.00 1 item - total £7.50 inc SALES DEPT Then why not join ... VCR Circuits £7.00 2 items - total £12.25 inc The Digital Centre, Greenlanes, 3 items - total £17 inc etc THE MANUALS LIBRARY CTV Manuals £10.50 Barnstaple, Devon, EX31 1UL note: some items priced individually VCR Manuals £14.50 For details and membership 01271 325777 / 325888 Payment by credit card. P.O. (P P add £2.50 to each order) or cheque application form write, Tel/Fax: 01206 211570 phone or fax: 419 LANGSETT ROAD, e-mail: HARVEY ELECTRONICS SHEFFIELD S6 2LL [email protected] 43 Loop Road, Beachley, Chepstow, in tete % 2 The Lodge Mons, NP16 7FIE ELECTRTCS LIMITED Easthorpe Green Tel: 01291 623086 Fax: 01291 628786 1043 LEEDS ROAD BRADFORD BD3 7DB ---. _, Marks Tey. Colchester TEL: 01274 665670/660196 %Iti- s CO6 IHA Visa Mastercard accepted FAX: 01274 665246 ELECTRONIC SURPLUS CLEARANCE SALE E-MAIL: tradesales•Instorelecisnet.co.uk SCOOP PURCHASE FLUKE HAND HELD DIGITAL MULT1METER MANUFACTURERS NEW GRADED MODEL 80248 STOCK, MINT IN ORIGINAL PACKING A digital Handheld LCR Meter Measuring inductance. CLASSIFIED TEL:020 8722 6028 capacitance and resistance 3 5 degrt 1999 count RECRUITMENT WANTED M I MING FULLY GUARANTEED display inductance range 2MH to 20H capacitance range 2000pF to 200ii resistance range 2000 to 20 megohms COMBI TVCR from £99 Brand new and boxed with test alligator clip leads and 14" PORTABLES SCART £59 user manual £44 • £3 50 p&p WIDESCREEN TV from £185 Cancelled export order 750V AC,DC 2 amp ADOC Television/Bench Engineer Reg: BEST CAS H ON DIGITAL WIDESCREEN £375 Resistance 20Megohm plus Siemens range Also measures temperature -20°C to .1265°C Temp probe (Occasional Field) PRICES PAID SVHS VCR £195 not included Calibrated for K-type thermocouple. MICRO WAVE OVENS £34 Peak hold taoley Supplied brand new and boned but vain TV TCR Audio OVO MULTI REGION £120 orignal purchasing organisation's small dentrlying mark For ALL valves on case rest leads and handbook included All makes AUDIO • OVO • CDR • Cameras • Fax • MWO ()tiered at a tractIon of onornal pnce £47.50 p&p £6 50 especially KT88, PX4 (Dept. T) CHEVET SUPPLIES LTD With good up to date experience CREDIT CARDS WELCOME • 48 HR DELIVERY 157 Dickson Road, BLACKPOOL FYI 2EU CV's by fax or E-mail. and other audio Tel: (012531 751858. Fas (012531 302979 Ennui chevetaglobalnetco uS [email protected] types. Noe Telephone Orden Accepted X i & Callers ,vetome Tues. Thurs. Fn and Sat Tel: 01908 640 221 Fax: 01908 379 569 Tel: 01403 784961 REPAIRS I.R.0 £20k for right person Billington Export Ltd Brook Domestic Services Sussex RH14 9EZ Fax 01403 783519 Unit 4 Email: [email protected] Trade repairs to RECRUITMENT Woodward House Visitors b a • •ointment Cambridge Street Sky digiboxes Bletchley Pace, Amstrad, Grundig. Panasonic, COLOURVISION Milton Keynes (including Fluid Ingress). MK2 2TH FOR A FREE All makes repaired at a fair fixed price. COLOURTRONICS LTD Scan Digital Services Member of National Network CONSULTATION For details with workshops in Ilford ON HOW BEST Give Alan a ring on Require min 5 year LINEAGE TO MARKET Tel/Fax: 01633 25 40 50 (or don't apply) E-Mail: [email protected] uk Highly experienced VECT ORSC OPE: Leader PAL YOUR PRODUCTS/ Vectorscope, model no 5851V, 150mm cd BENCH ENGINEER display with illuminated graticule. £875 ono. SERVICES TO A Tel 0161 432 3695. (occasional Field) PROFESSIONAL LINEAGE For TV, VCR, HiFi. CHEAPEST: CABLETIES, FUSES, All Manufacturers! plug -tops, crimps, tapes. tv/video, remote AUDIENCE, handsets, microwave, fax. printers. PRIVATE RETAILER has excellent part Up to £24k for right person. Tel 020 7232 2266 Mobile: 0781 5974592 CONTACT exchange colour televisions and videos to clear. Tel 01494 814317. 123 Ley Street, Ilford, Essex LOUISA ON IG1 4BH CO MPUTER SOFT WARE PROGRA M FOR SALE LEICESTER: Hot air for tv rental company to run on Windows 98 Fax: 0208 220 8129 desoldenng tool. £290 Phone. 0207 289 0598 0208-722-6028 Contact: Barry atbthomas*Indigo.ie Evenings only L_ RECRUITMENT RECRUITMENT

Excellent Opportunities for Bench Engineers at Technically, you couldn't Normanton nr. Leeds & Field Engineers in make a better move. Scotland, Northwest and West Yorkshire Technical Support Engineer As one of the UK's largest independent electrical after sales service

£Excellent salary + benefits package • Thatcham. Berkshire providers, we have a strong reputation for a quality aftercare and

Sony is famous around the world for its innovative products and techni- support service, carried out by Engineers who enjoy managing their cal excellence. We are proud of our reputation and are committed to own workloads. After all, only experience can tell you how much time keeping our standards amongst the highest in the industry. Every one of our people has a part to play and we are now looking for a and attention each customer's job needs. You will repair televisions Technical Support Engineer to join us at our National Operations Centri. and other audio and visual products down to component level either Thatcham. Berkshire. in the customers home or in our well equipped modern workshops. Much of your time will be spent on the phone helping Sony dealers resolve technical problems with our range of brown goods. You'll use So whatever the problem, you will have the skills to remedy the PC support systems and will need to be capable of fault finding to corn ponent level. You'll also work on products in our own workshops, diag- situation, quickly and efficiently, coupled with the customer care nosing and solving problems. and will produce reports for feedback. that ensures an individual service. We are looking for someone with at least three years' workshop experi- ence, a good working knowledge of brown goods and basic engineering Join us and we will fix it for you to receive a highly skills. Friendliness and an excellent telephone manner are also important competitive benefits package including pension This is a great chance to develop your technical skills with an industry leader. To apply, please write, enclosing your CV and current salary scheme with up to 5 weeks holiday. details. to: The HR Department, Sony UK Limited, The National Operations Centre, Pipers Way, Thatcham, Berkshire RG19 4LZ. Applications to: Email: [email protected] Mark Perrier Personnel and Training Manager, Elect Servicing, Unit 19, Imex Business Centre, Ripley Drive, Normanton WF6 1QT (please enclose salary details) or email: [email protected]

For an informal discussion call Mark Perrier on 07766 205 717

U-View TELEVISION SERVICING 7 ifiximprzrzarazza. £.99.00 Information includes 3 II • • T Service Adjustments, Parts NE W EDITION BO OK A Views & Lists, Alignments, Waveforms, Diagrams, Fault- Finding, Voltage Charts etc.

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446 May 2002 TELEVISION WHAT A LIFL, A mixed bag of faulty A big Philips TV We'll have to fit a replacement and Our next caller was Mr Weedier. We' ve program it. VCRs and TV sets. The suffered from him for years. Won't lift a He fitted a new chip then briefly shorted current state of TV finger if he can get some mug to wait on pins S23 and S24 together. From the him, and doesn't like paying for service menu that appeared on the screen broadcasting - rubbish anything. he selected A, Options Alignment, then B. "Here Don" he simpered, "help me with and adjusted Option 2 to 103, using the TV. Donald Bullock's this telly, will you? It's a big 'un, see, a remote-control unit's plus and minus servicing commentary 28in. Philips, and my back's bad. I'm buttons. Finally he pressed Menu to revert parked just outside." to the original screen, then D to store. He was parked outside all right. About Now that the receiver was set up it eighty yards up the road, on the other worked normally. With the similar Model side, and the traffic was building up 25ML8300, fitted with the FL1.7 chassis. nicely. When we got to the car he you follow the saine routine but set teven has been spending a few days supervised as I struggled to get the set out Option 2 to 39. walking on Exmoor with his wife and from the back seat. Then he trotted off "Very clever, Paul" I said, "I'd better go Sdog, so Paul and I have been guarding back to the shop while I followed as best and make the tea." the fort. Paul is far more patient than me, I could. When I arrived he was sitting When Mr Weedier came back for his set even with the silliest customers. When I down. Paul helped me get the set on to he didn't like the size of his bill. Nor the arrived the other day he was talking to Mr the counter. long and lonely walk to his car with the Shiner, who had brought in his Mitsubishi "I 'spect he was heavy, eh?" said set. HSB82 VCR. Weedier. "I'll leave it to you." The set was a Model 28ML8800, which The Goodmans 1405R A troublesome VCR When I returned with the tea Paul was "I know 'e's old, Paul, but I'm sorta tuning a Goodmans 1405R TV set. He attached to 'm like" Mr Shiner said, "you Just then we heard a slight crack and carried out a search and locked to a understands now, don't you?" the picture quivered. Paul prodded station, producing a good picture, but "Sure do" Paul replied, "and you're about on the tube's base panel, then after a few seconds the tuning drifted oft. going to tell me he's not well, aren't the line output transformer, but Paul decided to replace the 33V tuning you?" supply stabiliser ICI 04, which can be the "Yes, 'e's poorly" Mr Shiner continued, everything there seemed to be all cause of this symptom. But the fault "produces awful pictures and keeps right. Then we heard the crack persisted. He went on to check various drifting off tune." again, and saw a spark jump from other components in the tuning voltage "Leave him with me" Paul said. one of the legs of the line driver circuitry. After spending an hour he'd When Mr Shiner had departed he set transformer to the board. found nothing amiss. about testing the machine. "Tuning drifts "Can't understand it" he said then, a all right" he commented, "and there's a minute or so later, added "I seem to recal I sort of red shadow to the left of images." is fitted with the FL1.6 chassis. When I reading somewhere about this. The "To the left?" I queried. "You don't plugged it in a good picture appeared. setting of the tuneable AFC tank coil mean to the right, do you? After all the But the on-screen display and teletext connected to pin 47 of the TA8690AN scanning beams move from left to right, were too dark, and the standby LED was jungle chip IC201 is supposed to be very so most picture disturbances are to the flashing. I noticed that Paul was studying critical." right of the object." the screen too. When he checked the coil he found that "Definitely to the left" Paul replied, "but "Ah, you're good at these, aren't you?" the core was waxed in, though it looked I'd better attend to the drifting first." I said. He looked surprised. "So I'll hand as if someone had disturbed the wax Several electrolytics were leaking their it over to you then." slightly. He went through the routine of electrolyte — C210 (47g, 16V), C232 Just then we heard a slight crack and the retuning the set while rocking the core to (10µF, 16V), C203 and C208 (both picture quivered. Paul prodded about on and fro very slightly. After a while he 470µF, 10V). Replacements cured the the tube's base panel, then the line output found a position where the tuning drifting, but the red shadow was still transformer, but everything there seemed remained stable. A lengthy soak test present. Paul hunted around for more to be all right. Then we heard the crack confirmed that the set was now faulty electrolytics and found five, C221, again, and saw a spark jump from one of satisfactory. C6001, C6E5, C116 and C3D1, all the legs of the line driver transformer to 470µF, 10V. Once they'd been replaced the board. It was dry-jointed. Paul Mrs Phillips' VCR the red shadow had gone. But that wasn't resoldered it, switched on again and Then Mrs Phillips arrived with a Sanyo the end of the story. There was also slight studied the screen carefully before he VCR, Model VHR789E. She's a decent field bouncing. Paul tapped around the spoke. type who runs, and lives over, a little tuner and IF cans and found that this "I reckon the EEPROM chip's been general store. Amongst other things the affected the bouncing. Close examination damaged and corrupted by that sparking. store features a rack of delicate china revealed that they were dry-jointed to the It's a 24C04B1, IC7137, and has to be ornaments. board. Once they had been resoldered the programmed for this particular model. "Can you mend this for me, boys" she results were excellent. The arcing must have changed its data. asked, "it's gone dead. And when you've

447 May 2002 TELEVISION done that could you nip back and take a chassis. Apparently it worked well Never before has so much rubbish gone look at my telly? I can't manage the two enough for about a quarter of an hour, out on so many television channels. together." then the colour would drop out. She There's barely enough decent TV I opened up the VCR and carried out reckoned that as the evening wore on after programming to justify a single channel. some checks in the power supply. There that the picture changed to a sepia tone. Take comedy, if you can find any. There was HT from the mains bridge rectifier We connected it up, threw a blanket over have been lots of fine programmes in the but no chopper circuit start-up voltage. it, and watched. It did exactly as she said. past, such as Steptoe and Son, Are you My eyes settled on a pair of 560kn Paul made for the AN5601K colour Being Served?, Hancock's Half Hour, resistors, R5002/3. Both proved to be decoder/timebase generator chip IC301. Fawlty Towers, The Two Ronnies and open-circuit. The machine worked As we didn't have one in stock, he Dad's Army. There's nothing to compare normally once replacements had been checked a few suspicious-looking with them today. What comedians do we fitted. peripheral components. This didn't bring have to replace the likes of Les Dawson, When I'd reassembled the VCR Paul to light anything obviously wrong. The Max Wall and Bernard Manning? And offered to take it back to Mrs Phillips and next step was to carry out some voltage where are there programmes in the same have a look at her TV set. He had the set checks. class as the Forsythe Saga, Upstairs with him when he returned, and was Pin 12, which is connected to the Downstairs and All Creatures Great and grinning. chroma signal processing section of the Small? Gone, that's where. It seems that "What's the joke?" I asked. chip, should be at about 5V. The feed to we shall never see their like again, except "No joke" he replied, "only when I got this pin comes from the line output stage as occasional repeats. to Mrs Phillips she was having trouble derived 12V line via a 2.2M52 resistor, The trouble doesn't stop with today's with one of her customers. One of ours R337. Paul obtained a voltage reading of terrible so-called 'stars'. There are also the too, Mr Weedier. She has a prominent just 1.4V at pin 12. When he checked the gabbling and insulting programme notice on her rack of china ornaments. It value of R337 he found that it had risen to presentations. And the BBC has reads 'You touch, you break, you pay'." about 4MQ. A replacement cured the succumbed to copying the advertisements "Well?" I asked. trouble, and Mrs Phillips was delighted. in the commercial channels, punctuating "Well, old Weedier had touched all the spaces between its programmes with right. And broken one. He didn't want to Today's rubbish TV ever more childish 'advertisements' of its pay. Boy, did she straighten him out." In a recent questionnaire fifty per cent of own. viewers said that TV programmes have A final thought. Where do the TV . . . and her TV set worsened of late. I'll say they have. What broadcasters find their armies of brash, Mrs Phillips' TV set was a JVC surprises me is that so many of us continue shrill young female announcers? On Cl4ETIEK, the one fitted with an Onwa to allow TV sets to take up house room. second thoughts, don't tell me.•

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448 May 2002 TELEVISION Special Offer Sale - 20 Remote Controls £20.00 (mixed all well known brands) NEW TYPES MAIN SWITCHES FERGUSON SAMSUNG TECUS983 VA24A TUNERS 10 MIXED £2.00 ADAPTOR - VPT - TEXT - VHF-Tuner with Aerial Socket IF TERC8-022A TBJZA-00ZA-ALPS VT311-VT210-VT3I I VA354 £2.00 UHF Fit most new TV's £5.00 £3.00 REEL DRIVE £2.00 AC MAINS & BATTERY-VA365 SATELLITE SXT2302 180968 £3.00 P/P £3.00 ea ZSK2761 FERGUSON NICAM MODULE HI SATELLITE CAMCORDER BATTERY HIGH WITH BASE BAND MIN 600v/lOamp N FETS £100 Art No 989 591-E00 £5.00 TDA 8362N £5.00 CAPACITY 9.6V 1800MA-VA310 SXT2302234 £4.00 £3.00 SMALL UNFNHF £3.50 24CO2 15p VIDEO DECKS CAMCORDER BATTERY CHARGER VHF/UHF - TEKE4- 112A £4.00 DA81785 £5.00 AIWA 1500 9.6 VOLTS VAZ65 EACH £6.00 4944 TDA2653A £.00 CAMCORDER CAR ADAPTOR MATSUI VXA 1100 U321, U341, U342, U343 rDA4866 £3.00 CHARGER - AND BATTERY-VA308 MATSUI 1500 U344, U411, U412, U944 I EACH £2 MITSUBISH VIDEO £5.00 ORION D1094 £5 £9 POST U743, 7744 HEAD & DRUM 948B231820 £10.00 CAMCORDER LENS 2OFF - ORION DI096 AMSTRAD HEAD 928B654080 TELE-CONVERSION LENS x1.4 & £5.00 ORION D2096 ETC UE33-B0 I £3.00 UNIT GUM IDLER x0.7 £1.00 £2.00 CAPSTAIN MOTOR FOR ABOVE MRF7-7E33 LOFT CT2145 £5.00 CARDIOID CAMERA MICROPHONE- MATSUI ORION VIDEO TUNER IF VA SUPER 218 TELESCOPIC BOOM DECKS £8.00 CT246 £5.00 £5.00 & STAND £5.00 20 HIGH VOLTAGE CAPS 1500V - PHILIPS TUNERS NTSC FS936E £3.00 FERGUSON CHROME BOARD-ICCS 2000V MIXED £1.00 PHILIPS TUNER U1343/5 31-39-147- 1F2105-RE £5.00 I/Cs U4647T1CF OR HAI1498 £6.00 15281 £3.50 MTP2011-APOO £5.00 DECK AND CAPSTAN MOTOR: HANDSETS 10 OFF NEW TYPE HAND SETS UHF - ICC5 £5.00 FV6ILV- FV62LV, FV67LV FV68LV AMSTRAD VHF - ICC5 £5.00 MITSUBISHI £5.00 + £5.00 POST EACH £30.00 4600 £3.00 TX85, TX86, TX89, TX90 EACH £4.00 NEW CHASSIS TUNER FV70B, FV71LV, FV72LV, FV74LVX 4700 £5.00 TX98, T99, TX100 EACH £4.00 ALL COMPONENTS AND LOFT EACH £30.00 6000 £15.00 ORION CT21AVIBS1 £6.00 POST £5.00 FV77HV £30.00 6800 £4.00 1500 - UE33 B09 £4.00 FV31R £12.00 CT28AVIBS PANASONIC HEAD AND DRUM UNIVERSAL £3.00 CAR IMMOBILISER WITH KEY £5.00 SMALL UHF/VHF £3.00 MODULATOR-SATELLITE-TI040- DECCA TUNER UE25-B56D £3.00 FERGUSON SRD3/4 £2.00 NICAM LCD £4.00 FERGUSON ICC 7 HAND SET £3.00 DOUBLE SIDE NICAM £10 PANEL-TI228B FERGUSON ICC5 NICAM SINGLE BOARD ICC5 TEXT FOR TX89, TX98, TX99, BSB £1.50 FERGUSON VIDEO £10 TX100 £6.00 FV41R/3 V59 £10.00 TATUNG FV90 LV HAND SET £3.00 PANEL-1X90 THORN FRONT - FV41R/FV42-FV51-52 UNIVERSAL 205 OR EQUIVALENT F V80 LV HAND SET £3.00 - 8 BUTTONS 01M4-515-002 £5.00 ICC5 £7.00 WITH AERIAL SOCKET £3.00 BRIDGE RECIWILRS 10 FOR £1.00 PANEL-TUBE BASE-ICC5 £5.00 11(2000, IK7000 EACH £4.00 CAMCORDER-UNIVERSAL PANEL-TUBE-BASE-1X89. TX98, SRD2, SRD3, SRD4 MOTORS BATTERY 9.6V - 1400MA FOR !VC- TX99 £5.00 EACH £1.00 1780 HITACHI PANASONIC-PHILIPS £5.00 PANEL-TUNING 1509G-TX9, TX10 £2.00 CAPSTAN 150E £3.00 DESOLDER PUMP £2.00 £5.00 TV/SATELLITE WITH FST £3.00 MATSUI POWER SUPPLY I2V-3A HITACHI FILTERS - 455 & 480 EACH 10p CAPSTAN I/C NO. M56730 ASP £15.00 FOR VIDEOSTAR CAMERA PP3 CFT2158 (NO REPLACEMENT) £5.00 GAS SOLDER IRON-PORTASOL 2 TYPES 1995 TO 1997 MODELS £4.00 VIDEO RM933E VIDEO PLUS £30.00 HOBBY £10.00 MATSUI VIDEO DECKS WITH PUSH BUTTON UNIT-1X85, TX86 - INFRA RED DETECTOR MATSUI CAPSTAN MOTOR AND HEAD 8 BUTTONS £5.00 WIDE/SHORT ANGLE WITH RELAY 1500 £5.00 P/P £5.00 £20.00 VSR 1500 £4.00 MITSUMI £5.00 HITACHI VX3000 £3.00 MOD MRF7-UF32 £5.00 INFRA RED RECEIVER-MATSUMI DECODER-TELETEXT PC232A5 - MOD 'TMUG3-103A £5.00 MINIATURE £1.00 ISSUE 4 £15.00 3000/ORION - TV AND VIDEO £2.00 MITSUBISHI PANEL-11C2-FM221 I STEREO £5.00 HEAD AND DRUM - 620E £12.00 RC = PACE 900, FERGUSON. SONY. CAPSTAN-HSE4I-1/C MS1782ASP PANEL-CVC80-POWER £5.00 OSCILLOSCOPE 20MHZ DOUBLE GRUND1G £5.00 £2 00 POSITOR 182 PIN 20p BEAM - V2I2 £188.00 MITSUBISHI POSITOR-2322 662 98012 50p PANEL-TELETEXT G8P - ISSUE 6 RM35 - VIDEO £5.00 12vto 15 D.C. PSU AC I2V 500MA £1.50 £10.00 NOKIA PANEL-TELETEXT PC315-11- ISSUE 7 TV MODULATOR WITH LEADS PSU AC 9V IA £1.50 RC202 £4.00 £15.00 VIDEO IV 75R QUARTZ HALOGEN - VP940I PANEL-TEXT-VT7S3E £20.00 AUDIO IV 10K D1096 500W 200V FOR OUTDOOR LAMPS TELETEXT CONVERSION KIT £3.00 HV100 £3 EACH £1.00 CORE 2 90e ITT TEXT PANEL £3.00 VXA 1100 RELAYS-SUB MINIATURE 25p 1996/7 MATSUI AND VIDEO PLUS TV AERIAL AMPS VHF /UHF SATELLITE TUNER UNIT -2427611 VIDEO CHASSIS WITH TUNER-IR ORION 1 WAY 20dB EACH £5 .... BASE BAND/VIDEO OUT £3.00 POST £4.00 £5.00 TV AND VIDEO £2.00 2 WAY18dB EACH £5 SCART TO 4 PHONO LEADS 1.5M MATSUI - ORION VIDEO WITH LCD - 1992/93 MODELS 4 WAY10dB EACH £5 8 WAY4dB EACH £5 £3.00 DECKS WITH HEADS - £5.00 240v MAINS SCART TO 6 PHONO LEADS £3.00 D1096 VXA110 VP 9401 £16.00 SAMSUNG HEAD-VSR 1500 = ORION D2096 £5.00 SCART TO "D" PLUG £1.00 HANDSETS, TV & VIDEO - 12 TYPES PANEL-MAIN-VSR 1500 COMPUTER 3 PIN MAINS LEADS SCART TO SCART LEADS - EACH £3.00 P/P £5.00ea £3.00 2'h METRES LONG - GREY ALL PINS CONNECTED SANYO POWER SUPPLY-VSR 1500 £5.00 EACH £1.50 - 1.5 METRES POWER SUPPLY & REG - UNIVERSAL VIDEO £3.00 2 METRES LONG - BLACK EACH £1 MODULATORS £2.00 TYPE STE 5343-VP9501 £8.00 COMPLETE REPAIR KIT. CLUTCH SOUND 5.5MHZ MPM 1OCOT £1.00 POWER SUPPLY-SWITCH MODE- AND PINCH ROLLER, IDLER SCART TO SCART - ALL PINS -1 SOUND 6.0MHZ MPM 1040 £1.00 1500 £3.50 D2906 £7.00 METRE EACH 60p

111 204 =1432 tune olp BUT! I AF 50p 1119.2450 15p HD6140•251 Sep No accounts No Crodit Cards 2801433 £1.00 HI 205 75p BUTI2A 20p HY W 95 111p 11E16140515 AI AO 2501576 £1.00 HI 2116 11.01 BUTI3 £1.00 IlYW95C lap 11045280P I Sp SENDZ COMPONENTS 2501577 £2.18 BU207 11.011 BUTISAF £1.00 B93156206 1000 Ilp HEF402oBP 20p :F 250180101 15p 012200 BUT711100 15p BYX10 10p IIFT40111 20p /101071. LI AO /3U208A 1 AO III '57. 11 401 090630.73501 25p 116A 1124A 50p 63 BISHOPSTEIGNTON, SHOEBURYNESS, 1705 25/ 144. £1.10 13(120110 00, III ,6 04 60p 1119X55/350 10p 11%10261 0771B 2S1..141.4 [1.00 8(1222 £1.00 Ill 5. £1.00 BYX55/600 10p AI P-15 £1.50 ESSEX SS3 8AF. .. .013 2S( 4991 BU326 £100 HI 504 50 P 119X7 I/60 20p 1K7ST 6031 B1 £1.00 1589 15000 '15A £2.00 FIL1407 40p Ill 50410 BYZ 106 10p 155401 Si, Tel: 01702 332992 Fax: 01702 338805 o01500V 0665521 £1 .00 131.1501SA 'my 111 4.1 211p BZW-C 110 79 18106A 10, 050 0665551 £1.110 H1 HO BUSOKAF 41Am] 517 BZW83-C20 Ip L298N £4.01 ,2110 AN503 I £200 01150101 00p 91 218-10)0 op CA31230 50p LAW

. 01 BU1824 50p HY\ 19-W 15p 11485ANIT £1.50 S13522% £1.1111 Additional PIP for HEAVIER GOODS. Technical information by 11261 HU1051011 Silp HUI126 [100 HY\ 20-200 15p 1i/11111041NT £1.50 SAA 1061 telephone only • Government/School Orders on official headings. 1266 01) 118 £1.00 HU6444/100 LIAO 11\ \9513 111p 0106515 50001 £2.00 SAA3010 £1.00 HU124 511p HUK4451600 £2.00 119595C HA51311SP3 £2.00 SAA5010 Callers to shop - 212 London Road, Southend-on-Sea 1415 11U126 sop BUK450600 LI 00 11Y0 46D FICF4520 54Ip SAA5231 142 , III1180A tee BUT1 I 50p 05W20.00.9 HCF452013F. Sep ITEXT) £2.40 Open Saturday Only 10-12noon - 2-5pm.

PLEASE ADD 17.5% VAT TO BOTH THE GOODS TOTAL AND P/P CHARGE PROMAX TELEVISION P R O N/lA X SELECTED ITEMS FROM THE PROMAX TEST PATTERN GENERATORS RANGE OF TEST EQUIPMENT

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The new pattern generators GV 798 and G V 8 9 8 offer advanced PRODIG 1 features at realistic prices. Satellite Dish Installer's Meter They produce 16:9 and 4:3 Does more than just BSkyB formats, output level set in 1 dB steps, multistandard, VITS, WSS, VPS, PDC. Teletext and much more. GV 898 uses vestigal side band modulation.

PRODIG 2 Analogue & Digital Aerial Meter Measures digital channel power and C/N PROMAX GV SERIES • Choice of 12 instruments • . 11111111. • NICAM and Teletext ' h. • 4:3 and 16:9 Formats • Full field and VITS 6.7 • Computer Controlled 71! • ou.4.4.44.4.4. , • Front panel memories ..... • Multi Standard, PAL. NTSC. SECAM MC 377+

• OwnComputer Company Monitor Logo testers • 1111 1 Analogue & Digital, Satellite & Terrestrial Measures channel power and C/N • Hand Held Models • High Quality Construction • Attractive Price Levels • Full After Sales Service • Available from Stock

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t.) :52 re £ P U Y PROLINK 3 SERIES FOR T- ELEVISION PATTERN GENERATORS, Satellite & Terrestrial, Analogue & Digital, THERE'S NO WIDER CHOICE THAN WITH PROMAX Spectrum Analyser with Optional BER

P R O N/lA X [Alban . ---. TA-901 CRT Rejuvenator

ALBAN ELECTR ONICS LIMITED

THE PROMAX SERVICE CENTRE

6 Caxton Centre, Porters Wood, St. Albans, Hertfordshire, AL3 6XT. , TEL : 01727 832266 rè;i4biefa FAX : 01727 810546 AA-930 E M AIL : albanelectronicsOcs.com SALES + SERVICE + CALIBRATION Audio Analyser TA-903B CRT Rejuvenator