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CD-PC1881V SERVICE MANUAL No. S0961CDPC1881 CD-PC1881V CD-PC1881V Video CD Mini System consisting of CD-PC1881V (main unit), CP-C881 (front speakers), CP-SW881 (sub woofer), NTSC/PAL GBOXS0026AWM1 (center speaker) and GBOXS0027AWM1 (surround speakers). • In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be Manufactured under license from Dolby Laboratories Licensing used. Corporation. DOLBY, the double-D symbol and “PRO LOGIC” are trademarks of Dolby Laboratories Licensing Corporation. CONTENTS Page SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2 VOLTAGE SELECTION ..................................................................................................................................................... 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR ................................................................................................. 2 SPECIFICATIONS .............................................................................................................................................................. 3 NAMES OF PARTS ........................................................................................................................................................... 4 OPERATION MANUAL ...................................................................................................................................................... 7 DISASSEMBLY .................................................................................................................................................................. 8 REMOVING AND REINSTALLING THE MAIN PARTS ................................................................................................... 11 ADJUSTMENT ................................................................................................................................................................. 12 BLOCK DIAGRAM ........................................................................................................................................................... 15 SCHEMATIC DIAGRAM .................................................................................................................................................. 18 VOLTAGE ........................................................................................................................................................................ 30 WIRING SIDE OF P.W.BOARD ....................................................................................................................................... 31 NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 38 TYPES OF TRANSISTOR AND LED............................................................................................................................... 38 WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 39 TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 40 FUNCTION TABLE OF IC................................................................................................................................................ 44 FL SEGMENT ................................................................................................................................................................... 56 PARTS GUIDE/EXPLODED VIEW This document has been published to be used for after sales service only. SHARP CORPORATION– 1 – The contents are subject to change without notice. CD-PC1881V SAFETY PRECAUTION FOR SERVICE MANUAL Precaution to be taken when replacing and servicing the Laser Pickup. The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class I Requirements. However, the following precautions must be observed during servicing to protect your eyes against exposure to the Laser beam. (1) When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position outer than the lead-in position, the Laser will light for several seconds to detect a disc. Do not look into the Pickup Lens. (2) The Laser Power Output of the Pickup inside the unit and replacement service parts have already been adjusted prior to shipping. (3) No adjustment to the Laser Power should be attempted when replacing or servicing the Pickup. (4) Under no circumstances look directly into the Pickup Lens at any time. (5) CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result in hazardous radiation exposure. CAUTION Laser Diode Properties Material: GaAIAs Wavelength: 780 nm Emission Duration: continuous Laser Output: max. 0.6 mW This Video CD Mini System is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the rear cover. Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. As the laser beam used in this compact disc player is harmful to the eyes, do not attempt to disassemble the cabinet. Refer servicing to qualified personnel only. CAUTION-INVISIBLE LASER RADIATION WHEN OPEN. DO NOT STARE INTO BEAM OR VIEW DIRECTLY WITH OPTICAL INSTRUMENTS. VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA EJ IN I STRALEN OCH BETRAKTA EJ STRALEN MED OPTISKA INSTRUMENT. ADVERSEL-USYNLIG LASERSTRALING VED ABNING. SE IKKE IND I STRALEN-HELLER IKKE MED OPTISKE INSTRUMENTER. VARO! AVATTAESSA OLET ALTTIINA NAKYMATON LASERSATEILYLLE. ALA TUIJOTA SATEESEEN ALAKA KATSO SITA OPTISEN LAITTEEN LAPI. VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA EJ IN I STRALEN OCH BETRAKTA EJ STRALEN GENOM OPTISKT INSTRUMENT. ADVERSEL-USYNLIG LASERSTRALING NAR DEKSEL APNES. STIRR IKKE INN I STRALEN ELLER SE DIREKTE MED OPTISKE INSTRUMENTER. VOLTAGE SELECTION The voltage selector is located on the AC voltage selector box. If adjustment is necessary, use a screwdriver in order to turn the selector in either direction unitil the correct voltage figure is displayed in the window next the adjustment screw. QACCA0001AW00 QACCJ0003AW00 QACCB0006AW00 QACCL0005AW00 QACCE0008AW00 QPLGA0003AWZZ QPLGA0004AWZZ Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR – 2 – CD-PC1881V FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. SPECIFICATIONS CD-PC1881V General Tuner section Power source: AC 110/127/220/230-240 V, 50/60 Hz Frequency range: FM; 88-108 MHz Power consumption: 140 W AM; 531-1,602 kHz Dimensions: Width; 270 mm (10-5/8") Height; 300 mm (11-13/16") Cassette deck section Depth; 362 mm (14-1/4") Frequency response: 50-14,000 Hz (Normal tape) Weight: 8.1 kg (17.7 lbs.) Signal/noise ratio: 55 dB (TAPE 1, playback) 50 dB (TAPE 2, recording/ Amplifier section playback) Output power: Front speakers; Wow and flutter: 0.15 % (WRMS) MPO; 176 W(88 W + 88 W) CP-C881 (10 % T.H.D.) RMS; 80 W (40 W + 40 W) Front speaker section (10 % T.H.D.) Type: 3-way type [13 cm (5-1/4") woofer, RMS; 72 W (36 W + 36 W) 5 cm (2") tweeter and super tweeter] (0.9 % T.H.D.) Maximum input power: 80 W Center speaker; Rated input power: 40 W MPO; 32 W (10 % T.H.D.) Impedance: 6 ohms RMS; 20 W (10 % T.H.D) Dimensions: Width; 200 mm (7-7/8") RMS; 14 W (0.9 % T.H.D) Height; 300 mm (11-13/16") Surround speakers; Depth; 254 mm (10") MPO; 32 W (16 W + 16 W) Weight: 2.9 kg (6.3 lbs.)/each (10 % T.H.D.) RMS; 20 W (10 W + 10 W) GBOXS0026AWM1 (10 % T.H.D.) Center speaker section RMS; 14 W (7 W + 7 W) Type: 10 cm (4") full-range speaker (0.9 % T.H.D.) Maximum input power: 40 W Sub woofer; Rated input power: 20 W MPO; 72 W (10 % T.H.D.) Impedance: 4 ohms RMS; 40 W (10 % T.H.D) Dimensions: Width; 260 mm (10-1/4") RMS; 32 W (0.9 % T.H.D) Height; 140 mm (5-1/2") Output terminals: Front speakers; 6 ohms Depth; 155 mm (6-1/8") Centre speaker; 4 ohms Weight: 0.9 kg (2.0 lbs.) Surround speakers; 8 ohms Sub woofer; 6 ohms GBOXS0027AWM1 Headphones; 16-50 ohms Surround speaker section (recommended; 32 ohms) Type: 10 cm (4") full-range speaker Video out; 1 Vp-p (75 ohms) Maximum input power: 20 W Input terminals: Video/Auxiliary (audio signal) x 2; Rated input power: 10 W 500 mV/47 kohms Impedance: 8 ohms Dimensions: Width; 170 mm (6-3/4") Compact disc player section Height; 88 mm (3-1/2") Type: 3-disc multi-play compact disc player Depth; 170 mm (6-3/4") Signal readout: Non-contact, 3-beam semi-conductor Weight: 0.5 kg (1.0 lbs.)/each laser pickup D/A converter: 1-bit D/A converter Frequency CP-SW881 Frequency Sub woofer section response: 20 - 20,000 Hz Type: 13 cm (5-1/4") full-range speaker Dynamic range: 90 dB (1 kHz) Maximum input power: 80 W Rated input power: 40 W Video CD section Impedance: 6 ohms Video output format: PAL/PAL60/NTSC Dimensions: Width; 200 mm (7-7/8") Height; 300 mm (11-13/16") Depth; 310 mm (12-3/8") Weight: 3.4 kg (7.5 lbs.) Specifications for this model are subject to change without prior notice. – 3 – CD-PC1881V NAMES OF PARTS CD-PC1881V ■ Front panel 1. Disc Number Selector Buttons 123 45 2. Disc Tray 123 45 3. Multi Indicator 4. Disc Skip Button 5. Open/Close Button 6. Dolby Pro Logic Indicator 7. Extra Bass Indicator 8. FM Stereo Mode Indicator