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.
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.
1. SPECIFICATIONS Ratings 6 AA (LR6, HP7)Baneries (Longer life alkaline baneries are recommended.) Internal Input: ACI20V 60Hz Output: DC9V 850mA Input: AC230V/240V 50Hz Output: DC IOV 850mA BaneryPack Input: DC9V Output: DC7 .2V l200mA/h Car Adaptor Uses power from a I 2V car banery. Input: DCI0.
2. IDENTIFYING PARTS 2-1. Front & Top Views of Console Power Light (POWER) Color LCD TV Display Brightness Control (BRIGHT) Directional Button'---+(PAD GG) .......... ...... ........ ..... .... . I I Button 1 & 2 Speaker Volume Control (VOLUME) Power Switch (POWER) Gear-to-Gear Cable Input {EXT) 2-2.
3. DISASSEMBLY 3-1. Dismantling Procedure Removal of bottom screws and bottom case (See Fig.1 ). 1) Turn the power button off. 2) Tum over the unit. 3) Remove both battery companment lids (8 & 9). 4) Remove screw (204). 5) Remove six screws (20 I). Main board removal (See Fig.3). 1) Remove two screws (202). 2) Remove six screws (203). 3) Remove the main board from the top case. Fig-3 Fig-1 6) Remove the bottom case (See Fig.2). Lift bottom case in the direction of arrow (A) and make the open condition.
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.
4. BLOCK DIAGRAM IC2 IC3 MAIN BOARD 1 CHIP=CPU+VOP+SCA JLP04364G-1 5L HM65256BLFP-12 MAIN RAM 64KBIT STATIC RAM VRAM 256KBIT PSUEOO STATIC RAM ICl IC CUSTOM CHIP r-------------------- - E -----------------------------------------, Z80A CENTRAL PROCESSING UNIT lf ADDRESS BUS I II ~ ~~~:============-=~==j .~ II ~;=========~-=~ - VIDEO. DISPLAY PROCESSOR DATA BUS I==========::='J CONTROL BUS I================:J ,.---------. AC2 00V.----------..
5-2. Main Circuit Board-2 1..2 1Ciei..H E CIU HilT ANTI RC11 ..71< FL v 101< caz ill IT ANTI FWII 101< D 1ce. P 11 .. aJ CL2. DO [1.~ OW. CLA (\. 3]. CLB l . 3] c FW1 1'132 1001< .,.,......, 1!!.21< ... ~ =j=~u 201< 1 B L 010 .------'V..,.______t--""~ I!IIA81Z _vi 011 r-----~v-----------t--~r~~1az3 ' ' .
5-3. DC-DC Converter Circuit Board r 5-4. Sound Circuit Board -For l20V area - - - - - - - 06 I - - - - - - - - - -, I NOT USEO I I I -I .JG C3 FB~04V~4eO~B-00*2 E I I I L ..,l: : rh ---- - (_- CONN OC _, ,J~Ct< '---Ill 0 f---c>- - - 02 ce R4 4.7 I I ..JG FB~04VA450~B-00*2 r·u r·u 4.7 I I ~ ~1- Fl3 I tl~--~111 rzo:-<>---' C4 ~ 0.1U C6 --------, For AC230V/ AC240V area - r..v_ -, I 01 I I I _J - l R=:l 100 I r---I 100U~- CONN 2P I I .
6. CIRCUIT BOARD DIAGRAMS 6-2. DC-DC Converter Circuit Board (AC120V area) 6-1. Main Circuit Board (AC120V area) [Top View] [Top View] E [Bottom View] D [Bottom 6-3. Sound Circuit Board (AC120V area) View] c [Top View] B [Bottom View] A : r·... .~ ~~ - ---~- ~~~- . # ...
6-5. DC-DC Converter Circuit Board 6-4. Main Circuit Board (AC230V/240V area) [Top (AC230V/240V area) [Top View] View] E [Bottom View] D .. IC3 c M33 [Bottom M320 H29 H30 . M310b O OH28 M27 H26 H25 . Ml QOOO View] 6-6. Sound Circuit Board (AC230V/240V area) M3 bco;or& / ~J ft1L.O Qv [Top View] ;. . ; ·~ •-~ ·; tlR-~ ~~!~ ~-~~.: J} .··.. . , "·; ;}. ,. ; L,--~-J ~ M6 L1 0 .:: 6 : B MIL. [Bottom 0 ..• 4~ . '· ,, .
7. PARTS SPECIFICATIONS 7-1. Main Circuit Board IC1 Custom Chip GG QFP 144P •Top View 73 108 109 1 72 114 37 38 • Description No. I I 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 No. Pin Name No. Pin Name No.
IC2 IC HM65256BLFP-12 • Block Diagram • Top View & Pin Layout 1/0 0-1/0 7 : Data in/outputs CE : Chip enable input OE WE : Output enable input : Write enable input Vee GND : +SV :OV • Operation Mode I I 1/0 Mode H LowZ Read X L HighZ Write L H H HighZ - H L X HighZ Refresh H X HighZ Standby CE OE L L L H I WE IC3 IC 11 PD4364G-15L IC FCB61C65L-70T IC MB8464A-1 OLL • Top View & Pin Layout • Block Diagram AAo As A7 As 9 A1o An A12 Vee Wf CE7 As A5 Ag A4 Al
IC4 Dual Operational Amplifier IC 11 PC358G2 IC NJM2904-01 •Top View • Pin Layout 8 3 5 VDD 0 4 7-2 DC-DC Converter Circuit Board IC1 IC MB3775PF-G-BND • Top View & Pin Layout • Block Diagram t••-(\ ,3.
7-3 Sound Circ..
8· EXPLODED VIEW & PARTS LIST loded v·18w 8-1. Exp . Assembly 8-1-1. MaiM 3 / E / D / / / / / / ' / _..-" 2 3 I I I I ......................... / ' 2 13-3 'I I l ..... ..... I I ....... ) ..... ..... ' ..... ..... ..... ......... / c ..... ..... ..... / / 2~_, ........ ..... .....I I / / / ( I I I I I I I I I 2-6 I I I I I I I l. I I .....
8-1-2.
8-2. Mechanical Parts . List 8-2-1. Main Assembly Ref I Parts No. No. I 1 1 610-5403 610-5403-01 Circuit! No. 1 Description ASSY TOP CASE GG USA ALL ASSY TOP CASE GG USA ALL 01 [A. C] [C. S. C] [A. C) [C. S. C] 1-1 1-1 TOP CASE GG EXPORT ALL 253-6420-91 253-6420-01-91 TOP CASE GG EXPORT 01 ALL 1-2 1-3 130-5052 253-6367 SPKR 8 OHM 0.
al Parts list .Circuit Board Circuit No. Oeser ipt ion No. Oeser i pt ion Parts No. IC CUSTOM CHIP GG QFP 144P IC HM65256BLFP-12 SOP 28P NEC HITACHI EMS EM8 271-0007-02 271-0007-04 EMI FILTER DSS306-93E222Z100 MURATA EMI FILTER ED31-B222M TOKIN 6-A 5-A 1-A 35-A 53-lOA 53-12A 66-lOA 66-85A 330-lOA 33H5A IC IC IC IC IC IC IC IC IC IC NEC SAMSONG PH Ill PS FUJITSU SANYO SANYO SANYO SANYO FUJITSU KINSEl l1 l1 271-0017 271-0017-02 BEADS INDUCTOR FBA04VA900AB-00 TAl YO BEADS INDUCTOR HF70BTL3.
C1 rcui t 1 No. t Parts No. I Circuit No. Desc r 1 ptl on I RES CHIP 1.8K OHM 1/lOW S~ RES CHIP 1.8K OHM 1/lOW S~ RES CHIP lK OHM 1/lOW S~ R56 R57 R58 476-2182-J-10 476-2182-J-10 476-2102-J-10 J1 NOT USED NOT USED (W/SEOl C1 C2 C3 150-0311 NOT USED NOT USED CAPE CHIP 33UF 6.3Y MF6.3FC33D8 NOT USED NOT USED C4 C4 1S0-0308 1S0-0420 CAPE CHIP IOUF 6.3Y MF6.
rcu1t No. I Parts No. ~ Circuit No. Desc r ipt ion I IRES CHIP 20K OHM 1/10W 1" RES CHIP 6.8K OHM 1/10W 1" R14 R15 476-2203-F-10 476-2682-F-10 C1 C1 153-0088 153-0096 CAP TANT CP 0.68UF 16V 3216 CAP TANT CHIP 0.68UF 20V 20" F9 C2 C3 C4 151-0265 151-0269 151-0265 CAP CER CP 0. 1UF 25V ZF 2125 CAP CER CP 0. 1UF 25V K 2125 CAP CER CP 0. 1UF 25V ZF 2125 C5 C5 150-0314-A 150-0314-01A CAP E 22UF 35V M35SPCX)22 CAPE 22UF 35V 35YXB22MY0511 C6 C7 C8 151-0265 151-0268 151-0269 CAP CER CP 0.
8-4. Accessories/Package List No. Oeser i pt ion Parts No. No. AC ADAPTOR AC240V/DC9V !A AS(AUSTRALIA) AC ADAP. AC240V/DC9V 0.85A BS CU. K. KUWAIT) AC ADAPTOR AC22DV/DC lOV 0.85A (EXCEPT U.K.KUWAIT.USA&CANADA) 1 400-5050 1 400-5109A 1 400-5204 2 601-6499 STRAP GG 3 610-5343 3 610-5365 PACKING GG PLUS TRAY &LIDCMK-2182 (AUSTRALIA. KUWAIT,SAUDIARABIA & SPAIN)) PACKING TRAY GG EXPORT SET (MK-2180(SPAIN)) 4 670-0332-01 I Parts No.
© 1993 Sega Enterprises, Ltd Printed in Japan (/) 31209
