Game Gear Service Manual
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ll(lliA" SERVICE MANUAL GAME GEAR VA1 NO. 004 ISSUED DECEMBER, 1993 CONTENTS 1. SPECIFICATIONS········································ 3 2. IDENTIFYING PARTS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 4 3. DISASSEMBLY · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 5 4. BLOCK DIAGRAM · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 7 5. SCHEMATIC DIAGRAMS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 9 6. CIRCUIT BOARD DIAGRAMS · · · · · · · · · · · · · · · · · · · · · · · · · · · · 15 7. PARTS SPECIFICATIONS································ 19 8. EXPLODED VIEW & PARTS LIST · · · · · · · · · · · · · · · · · · · · · · · · 23 8-1. Exploded View· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 23 8-2. Mechanical Parts List · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 25 8-3. Electrical Parts List · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 26 8-4. Accessories/Package List · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 29 Sega Enterprises, Ltd. BEFORE USING THIS SERVICE MANUAL This service manual covers the one-chip custom LSI (CPU+VDP+SCA). The First Serial No. of 1 Chip Version Unit. • AC 120V area • AC 230V/240V area • 0201 76537-(For USA) • 020019501- • 020168498-(For CANADA) • B30000001- • B20135204- • K37000001- • K201 17921- • P31020001- • P31000001- • COMPARISON WITH ANOTHER MODEL Electrical Components COMPONENT GAME GEAR VAO GAME GEAR VA1 CPU IC Z80A VIDEO PROCESSOR IC IC CUSTOM CHIP VDP GG IC CUSTOM CHIP GG 1/0, LCD CONTROL IC IC CUSTOM CHIP SCA GG MEMORY FOR CPU'S PROGRAM IC UPD4364G-15L Same as on left MEMORY FOR VIDEO PROCESSOR IC IC HM65256BLFP-12 Same as on left OPAMP IC UPC358G2 Same as on left DUAL SWITCHING REGULATOR ICMB3775 Same as on left DUAL LOW-VOLTAGE POWER AMP ICTDA2822M Same as on left ·.,. -2- 1. SPECIFICATIONS Ratings 6 AA (LR6, HP7)Baneries Internal (Longer life alkaline baneries are recommended.) Input: ACI20V 60Hz Output: DC9V 850mA AC Adaptor Power input Input: AC230V /240V 50Hz Output: DC I OV 850mA External BaneryPack Input: DC9V Output: DC7 .2V l200mA/h Uses power from a I 2V car banery. Car Adaptor Input: DCI0.57V-l6V Output: DC9V 800mA Power consumption 9V- 3W(ACI20Varea), IOV- 3W(AC220V/240V area) Operating environment Temperature: O"C -40"C, Humidity: l0%RH-80%RH (no condensation) Dimensions 2IO(W) X ll3(D) X 39(H) mm Specifications CPU ZSOA (3.58MHz) RAM 64kbit Memories V-RAM l28kbit Audio 3 types of sound + 1 noise. VDP SEGA custom LSI (l chip= CPU+VDP+SCA) 160 x 146 dot matrix Scrolling Screens 32 on-screen colors displayed from a palette of 4096 colors. 64 sprites on-screen with dimensions of 8 x 8 dot or 16 x I 6 dot Sprite Screens displayed from a palene of 4096 colors. Display capability Character Panerns Maximum of 448 defined types possible. Scrolling Directions Horizontal, vertical, diagonal. Display 3.2" Color LCD with Back-Light. Screen Dimensions 65.27 mm wide x 48.90mm high Screen Composition 160 dot wide x I 46 dot high Headphone terminal Plug in any set of normal headphones for private play. Extension terminal To play multi-player games using more than one Game Gear system. Slots For cartridge or TV Tuner Adaptor * Design and specifications are subject to change without notice. -3- 2. IDENTIFYING PARTS 2-1. Front & Top Views of Console Power Light (POWER) Color LCD TV Display Brightness Control Directional Button'---+- (BRIGHT) (PAD GG) ............ .. ......... .. .. ... I I Speaker Button 1 & 2 Volume Control (VOLUME) Power Switch (POWER) Gear-to-Gear Cable Input {EXT) 2-2. Bottom View of Console Cartridge Slot (CARTRIDGE) • • r l • • Battery Compartment Cover (BATT LID LEFT GG) Accessory Screwhole Battery Compartment Cover (BATT LID RIGHT GG) Note: Names of paJtS in brackets ( ) are used in the paJtS list. 2-3. Accessories Strap Game Cartridge AC Adaptor {Provided or sold separately) {Kuwait) -4- 3. DISASSEMBLY 3-1. Dismantling Procedure Removal of bottom screws and bottom case Main board removal (See Fig.3). (See Fig.1 ). 1) Remove two screws (202). 1) Turn the power button off. 2) Remove six screws (203). 2) Tum over the unit. 3) Remove the main board from the top case. 3) Remove both battery companment lids (8 & 9). 4) Remove screw (204). 5) Remove six screws (20 I). Fig-3 Fig-1 Sound board and DC-DC converter board 6) Remove the bottom case (See Fig.2). removal (See Fig.4). Lift bottom case in the direction of arrow (A) I) Remove four screws (203). and make the open condition. 2) Remove the suppon plate from the bottom case. Remove the connector of DC-DC convener 3) Remove two screws (203). board fixed on the bottom case. 4) Remove the sound board from the bottom case. Disconnect two connectors of sound board. 5) Remove the battery blade cover. 6) Remove two screws (203). 7) Remove the DC-DC convener board. 203 Fig-2 Fig-4 -5- 3-2. Reinstalling procedure Sound board and DC-DC converter board reinstallation. 1) Attach the power knob to the DC-DC converter board. 2) Anach the DC-DC converter board to the bottom case. 3) Tighten two screws (203). 4) Anach the battery blade cover. 5) Attach the sound board. 6) Tighten two screws (203). 7) Anach the support plate. 8) Tighten four screws (203). Main board reinstallation. 1) Spray surface of inside clear plate with static proof liquid. 2) Carefully check and remove dust inside clear plate and top case using air gun in a clean place. Attach each button and rubber contact in its normal position. 3) Attach the LCD cushion along to the bosses in the top case. 4) Lead the speaker cable outside the bosses of the top case. 5) Attach the main board. Case I After exchange of LCD. Take off protective film of LCD. Case 2 Others Clean surface of LCD using an air gun. 6) Anach the main board inside and along to the bosses of top case. Note: When setting the main board, it is important to anach it as quickly as possible to prevent the adhesion of dust on the surface of the LCD and clear plate. 7) Tighten six screws (203). 8) Tighten two screws (202). Bottom case reinstallation. I) Correct 2 connectors from the main board to the sound board and I connector from the main board to the DC-DC converter board. 2) Firmly set the bottom case to the top case taking care not to pinch the cables by the edge of the cases. · Tightening the screws on the bottom case. 1) Turn over the unit. 2) Tighten six screws (20 I). 3) Tighten the screw (204). 4) Attach both battery lids (8 & 9). -6- 4. BLOCK DIAGRAM IC3 IC2 JLP04364G-1 5L HM65256BLFP-12 MAIN RAM VRAM 64KBIT 256KBIT MAIN BOARD STATIC PSUEOO 1 CHIP=CPU+VOP+SCA STATIC E RAM RAM ICl IC CUSTOM CHIP r-------------------- - -----------------------------------------, Z80A CENTRAL PROCESSING UNIT lf ADDRESS BUS ,.---------. AC2 00 V .----------.. BACK LIGHT 30KHz DC-AC 0 ~ I II - DATA BUS FOR CD CONVERTER ~~~:============-=~==j VIDEO. I==========::='J L (INVERTER CI RCUI Tl .~ I I DISPLAY CONTROL BUS ~;=========~-=~ PROCESSOR I================:J +5V CCLK 3. 5795MHz DC-DC CONVERTER BOARD INTERNAL 6 AA BATTERIES CONTROL SOUND ANALOG MAIN CLOCK I C VS CONN +SV +5V VCLK BUS DATA BUS 32. 215905 ~m~ 1 DC-DC EXTERNAL •AC ADAPTOR CONTROL PAD +34 y 0 CONVERTER BATTERY PACK C 10. 738MHz MHZ CAR ADAPTOR CLOCK +5V. +34V ADDRESS BUS 45P CARTRIDGE 1------' STANDARD SLOT ~ DATA BUS CELL I ARRAY LCD DRIVER ~ CONTROL BUS CONTROL BUS 0~20V POWER SUPPLY +5V. +34V l=========:j IL co UN I T] CIRCUIT TO ~"-------' ~~...,...-.,..,.,.-J LCD DRIVER +5V SOUND BOARD SPEAKER 0. 15W I SOUND 0 8 OHM B SOUND ANALOG DATA GENERATER ~~~~~~~~~~~~~~~~~~~ (MONAURAU CCLK JOY BUS CONTROL & PAD VCLK 45P CARTRIDGE I/0 DATA BUS ] SLOT l.:================:j t5NNEC TOF ~---------------------------------------------------------------------------------------------------------J A 1 2 3 4 5 6 7 8 -7- -8- 5-2. Main Circuit Board-2 1..2 1Ciei..H E CIU HilT ANTI RC11 ..71< FL v caz ill IT ANTI FWII -101< 101< D 1ce. P 11 .. aJ CL2. DO [1.~ OW. CLA (\. 3]. CLB l . 3] c FW1 1'132 1001< 1!!.21< .,.,......, ... ~ =j=~u B L 010 201< 1 .------'V..,.______ t--""~ I!IIA81Z _vi 011 r-----~v-----------t--~r~~1az3 ' ' . ' A t 2 3 4 5 6 7 8 - 11- - 12- 5-3. DC-DC Converter Circuit Board 5-4. Sound Circuit Board -For l20V area ---- -- -------- -- -, r 06 I NOT USEO I I I I -I .JG FB~04V~4eO~B-00*2 C3 l C4 100U~- ~ 0.1U R=:l ~1- I 100 E 01 I I .. ,l: : C6 I I I Fl3 I rh 4.7 L ---- - _J r·u - For AC230V / AC240V area - r---- --------, 02 I r..v_ -, I rzo:-<>---' tl~--~111 ce I I (_- _, I R4 CONN OC ,J~Ct< 4.7 '---Ill f---c>- -- ~ I r·u 0 ..JG I FB~04VA450~B-00*2 I CONN 2P I . I SW1 ~ 2 I I . 0 1 I I 1--h _ _J L --- ----- --- -- - -- -------------------- ~ c r--~ C2 L1 II!' I 1.2mH 02 rl~1U A3 HAF22 > A4 11< > Fl1 3.91< Fl7 < C1 331< Ill: FIS 1101< (111:) 0. SBU IT ANTl " 2.21< L C4 C3 Q~ 0. 1U. I< ~2SAB12 1 A2 2SC1623 22U/35V . ~ 271< < Fl6 "~ 0 '] ~+ 11< FIB ) ~ 4. 31< (1"~ 1 1 1 1 1 1 6 e 4 3 2 1 a 9 rhn v s + F 0 0 v J CN1 Fl c I i T u c E p N N ~ c T c 9 +34V F 2 2 2 2 NC B NC IC1 7 VBAT 8 + 0 MB3775PF I i F ~ u G e c Fl N N B c T N VFIEF T T 1 1 1 1 1 D r-- C10 1C11 5 Fl13 1 GND 220 0.1Ul l100U/25V 4 1 2 3 ~ 5 6 7 e GNO Iii: L2 3 6BUH GNO 1' 03 C7 -- CB A12 ~ 2_ 360 (1/4Wl +5V 6BOPJ 471<FIB 0.