llfliij\" SERVICE MANUAL
Contents
1. P SRAM Interface Dual Interface Signal 66 ZRAM SRAM Interf ua ort Signals er OECS CIES VIDEO PSG Function Function Power Supply Test Signal Set To O Certainly Test Signals These Pins Set To Open Z80 Address Bus fas 126 1 Interface 130 CLK 68000 Interface Signals 131 SBCR VIDEO PSG ZCLR 10 280 Interface Signals MCLK EDCLK I O VDD Power Supply Joy Pad Interface 68000 Data Bus 145 vo vou De vbiz Use This Pin Set To Open Certainly JER Z80 Address Bus 68000 Address Bus 23 Name yo Function Function 160 161 162 163 VAIO 154 280 Data Bus 165 12 166 167 14 168 VAIS 68000 Address Bus 208 VDD Power Supply 169 VAI6 170 VAI7 171 VA18 172 VA19 173 VA20 174 21 175 VA22 1176 VA23 i 177 SOUNDAVDD 178 PSG ANLONG VIDEO PSG 1791 SOUNDAVSS 180 VSS GND 182 BR 0 183 10 184 BG I 68000 Interface Signals 186 IPL2 I 187 IORQ O CIE 1 780 Interface Signals 189 ZWR 1 191 AS 192 UDS 193 LDS 1 0 68000 Interface Signals2. wae lt gt k lt lt p p o NTSC 53 693175 2 7 33P PAL 53 203424 11 D lt lt x ARAY 16 lt o RA7 4 7MOHM B gt bp lt lt 55 58 di 5 0 0 1 1 phn lt a 22 zs za iie ua nal d C 1 gt gt ua lt lt lt b 0 olo 242424224444 POQUOUA GR O T T i Ok lt 2 2 7 lt 2 o MDY A Sd dd d CLEA _ r ONERE B T lll KIL TT O 15 P L 5 588 4 1 A 5 205 i 8 53 5 59 2 06 9107 7d NCAEE q id AFSH UPD4364CX 15 BEES lt lt lt vera ra 5 O A UI 68000 o La x 3 220P NDT USED O DIFFERENCE TABLE FOR DIAGRAN 1 CIRCUIT GRID No GENESIS DRIVE 53 693175MHz 53 203424MHz 47P NOT USED 10P NOT USED 5 2 SCHEMATIC DIAGRAM 2 IC2 zl 8 8 c l O 0 lo n A 33P 5 3
3. Parts NOT USED 151 0372 151 0354 i NOT USED 151 0354 USED USED NOT USED 151 0363 i NOT USED 151 0289 NOT USED 151 0372 NOT USED 151 0305 NOT USED 151 0305 NOT USED 151 0354 151 0372 151 0354 NOT USED 151 0311 151 0305 151 0311 151 0305 151 0312 151 0307 151 0307 151 0307 151 0308 USED 151 0312 USED 151 0309 USED 151 0354 151 0309 151 0361 Description NOT USED CAP CER CP 33PF 50V CH2125 CAP CER CP 100PF 50V CH2125 NOT USED CAP CER CP 100PF 50V CH2125 NOT USED NOT USED NOT USED CAP CER CHIP 47PF 50V CH2125 NOT USED 10PF 50V 2125 NOT USED CAP CER CP 33PF 50V CH2125 NOT USED CAP CER CP 1000PF 50V RB2125 NOT USED CAP CER CP 1000PF 50V RB2125 NOT USED CAP CER CP 100PF 50V CH2125 CAP CER CP 33PF 50V CH2125 CAP CER CP 100PF 50V CH2125 NOT USED CAP CER CP 5600PF 50V RB2125 CAP CER CP 1000PF 50V RB2125 CAP CER CP 5600PF 50V RB2125 CAP CER CP 1000PF 50V RB2125 CAP CER CP 0 01UF 50V RB2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 18PF 50V CH2125 NOT USED CAP CER CP 0 01UF 50V RB2125 NOT USED CAP CER CP 180PF 50V CH2125 NOT USED CAP CER CP 100PF 50V CH2125 CAP CER CP 180PF 50V CH2125 CAP CER CP 15PF 50V CH2125 Remarks PAL RGB NTSC PAL RGB NTSC PAL RGB NTSC NTSC F S PAL RGB NTSC
4. Q IN OUTPUT P PORT 1 Ves SV 0V 25 IC9 10 IC 10324 1 Parts No 3 3 5221 Outside View I Pin Layout IC LM324 Parts No 313 5063 A IC11 Ic MB3514PF G BND EF Parts No 313 5232 A CXA1145M T6 Parts No 313 5213 A IC RA2195D Parts No 313 5236 A Outside View II Pin Layout Resulator GND 1 C SYNC IN C SYNC 001 1 2 UPC7805HF Parts No 313 5214 Outside View 8 uy IN GNO OUT Equivalent Block Diagram IC 78055 Parts No 313 5230 8 EXPLODED VIEVV 8 PARTS LIST 8 1 EXPLODED VIEVV Notes NTSC GENESIS II 8 2 MECHANICAL PARTS LIST PAL RGB gt MEGA DRIVE Parts No Description Remarks 610 5479 ASSY TOP CASE GENESIS2 USA 1 NTSC 610 5480 ASSY TOP CASE MD2 EUR 1 PAL RGB 253 6592 BOTTOM CASE 2 EXPORT 1 837 9602 5 IC BD MD2 05 USA CBA 1 NTSC S 837 9602 F IC BD MD2 VAOF USA CBA 1 NTSC F 837 9602 SM IC BD MD2 VA0SM USA CBA 1 NTSC SM 837 9603 IC BD 2 VA0 EUR 1 PAL RGB 253 6298 60P CARD EDGE COVER 1 253 6504 1 253 6599 64 COVER 2 EXPORT 1 253 6598 LED LENS MD2 EXPORT 1 670 0248 SEAL CUSTOMER SERVICE 1 NTSC 670 3128 LABEL FCC 8 SMITH MK 1630 USA 1 NTSC 670 3129 LABEL SER NO MK 1630 USA 1 NTSC 670 3130 LABEL SER NO MD2 MULTI 1 PAL RGB 601 6973 RUBBER FOOT MD2 4
5. 194 R W 195 DTAK 196 UWR P SRAM Interface 197 LWR 198 CASO 110 199 RASO P SRAM Interface 24 IC7 8 5 4 2641 Parts No 315 0515 IC MB81461 12 Parts No 315 0423 IC V53C261210 Parts No 315 0616 12 IC M5M4C264L 15 Parts No 315 0515 15 IC HM53461ZP 12 Parts No 315 0481 424 642 12 Parts No 315 5543 II Outside View ADDRESS INPUT LINE ADDRESS STROBE INPUT ROW ADDRESS STROBE INPUT WRITE BAR BITAWRITE ENABLE INDI INPUT WB WE DATA TRNSFER OUPUT ENABLE OUTPUT SERIAL CONTROL INPUT SERIAL ENABLE INPUT DTJOE IC 424 642 10 Parts No 315 0622 IC UPD41264V 12 Parts No 315 0453 TMS4461 12 Parts No 315 0525 IC MSM51C262 10 Parts No 315 0623 Pin Layout wao sio 81 54 SiO sc 71 381 ve sio 8 SIO 3 210 DT OE VV IO RI WEWE H2 14 RAS A Rez 16 A A 18 Ve 20 A AS LINE OR ROW ADDRESS BUFFER ROW DECODER lt LIN E DECODER ADDRESS POINTER CLOCK OSCILLATOR gt 256LINE 1024ROW 258 x 4 256K MEMORY CELL di Uy SERIAL DATA SELECTOR 22 DATA w no ENABLE MASK DATA BUFFER w IN OUTPUT A PORT REGISTER a t 3 256 4 DATA REGISTER O sto t SERIAL SERIAL 510
6. 0 05 EXP 6 670 0740 GAME CATALOG 16 MULTI 670 3330 GUARANTEE CARD SOE MD2 FRG 8 ESP GERMAN SPAIN 670 3331 GUARANTEE CARD SOE MD2 FRA FRANCE 670 3332 GUARANTEE CARD SOE MD2 GBR U K 670 3381 GUARANTEE CARD MD2 ITA ITALY 670 3327 GUARANTEE CARD OZISOFT MD2 AUSTRALIA NEW ZEALAND NOTE ACCESSORY PROVIDED o 90 _ cman e 38 TM Sega Lid Printed in Jepen D
7. 2122 J 10 476 2122 J 10 476 2122 J 10 Description RES CHIP 10 OHM 1 10W 5 RES CHIP 150 OHM 1 10W 5 6 RES CHIP 1kOHM 1 10W 5 RES CHIP 10 OHM 1 10W 526 RES CHIP 150 OHM 1 10W 5 RES CHIP 1kOHM 1 10W 5 RES CHIP 47kOHM 1 10W 5 RES CHIP 51kOHM 1 10W 520 RES CHIP 15kOHM 1 10W 5 RES CHIP 47kOHM 1 10W 5 RES CHIP 51kOHM 1 10W 5 RES CHIP 15kOHM 1 10W 596 RES CHIP 47kOHM 1 10W 5 RES CHIP 47kOHM 1 10W 5 RES CHIP 75 OHM 1 10W 5 RES CHIP 75 OHM 1 10W 5 RES CHIP 4 7kOHM 1 10W 596 RES CHIP 4 7kOHM 1 10W 596 RES CHIP 4 7kOHM 1 10W 596 RES CHIP 4 7kOHM 1 10W 596 RES CHIP 7 5 1 10W 5 RES CHIP 1 2kOHM 1 10W 5 RES CHIP 12kOHM 1 10W 596 NOT USED RES CHIP 2 2kOHM 1 10W 596 RES CHIP 75 OHM 1 10W 596 RES CHIP 5 6kOHM 1 10W 596 RES CHIP 5 6kOHM 1 10W 596 RES CHIP 5 6kOHM 1 10W 596 RES CHIP 1kOHM 1 10W 596 RES CHIP 24kOHM 1 10W 596 NOT USED RES CHIP 1kOHM 1 10W 5 RES CHIP 10kOHM 1 10W 596 NOT USED RES CHIP 1 2kOHM 1 10W 596 NOT USED RES CHIP 1KOHM 1 10W 5 RES CHIP 330 OHM 1 10W 5 NOT USED RES CHIP 1 2kOHM 1 10W 5 RES CHIP 1 2kOHM 1 10W 5 RES CHIP 1 2 1 10W 5 Remarks NTSC S NTSC F PAL RGB NTSC SM NTSC S SM NTSC F PAL RGB NTSC S NTSC F PAL RGB NTSC SM NTSC F S PAL RGB NTSC SM PAL RGB NTSC F S NTSC SM Parts Circuit No 476 2103 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2473 J 10 476
8. 601 6974 RUBBER FOOT SJ 5012 BLACK 1 012 P00308 TAP SCR PH 3 8 9 012 P00310 TAP SCR PH 3 10 4 012 P00316 08 TAP SCR PH BLK 3 x 16 2 8 3 ELECTRICAL PARTS LIST Circuit No Parts bh SL 5 5 5 5 5 5 5 5 5 5 315 0685 315 0686 315 0547 10 315 0677 A 315 0759 85A 315 0759 10A 315 0760 12A 315 0547 10A 315 0677 A 315 0759 85A 315 0759 10A 315 0760 12A 315 0738 R 315 5676 315 0782 R 315 0546 315 0651 A 315 0635 315 0753 10 315 0753 12 315 0754 315 0755 315 0766 85 315 0766 10 315 0773 315 5660 315 0515 315 0515 15 315 0453 315 0423 315 0481 315 0525 315 0616 315 0622 315 0623 315 5543 315 0515 315 0515 15 315 0453 315 0423 315 0481 315 0525 315 0616 i 315 0622 Notes NTSC GENESIS PAL RGB MEGA DRIVE II Description IC HD68HC000CP8 PLCC HITACHI IC MC68HCOOOFN8 PLCC MOTOROLA IC HM65256BLFP 10 SOP IC TC51832FL 10 SOP TOSHIBA IC TC51832AFL 85 SOP TOSHIBA IC TC51832AFL 10 SOP TOSHIBA IC LH59P832N 12 SOP SHARP IC HM65256BLFP 10 SOP IC TC51832FL 10 SOP TOSHIBA IC TC51832AFL 85 SOP TOSHIBA IC TC51832AFL 10 SOP TOSHIBA IC LH59P832N 12 SOP SHARP IC Z84C0006 ZILOG IC CUSTOM CHIP UPD9033GB 4 3B4 NEC IC TMPZ84COOAU 6
9. PARTS SPECIFICATION HD68HC000CP8 IC MC68HC000FN8 Parts No 315 0685 A Parts No 315 0686 A z Qutside View UU Q 4 Description Elle EEES ES 1 1 Tranter Acknowisges 11 002 ak murem TT vaia Memory ERR i BsEm we TT 0 Foncion ocou Fc 0 Code aise 1 DR IE f ame Address Bus 16 E Address Bus 17 5 Address Bus 19 Address Bus 20 Address Bus 21 O Data Data bus 15 15 VO 12 r uma Bus 22 D D Data bus8 fwo Data Data bus 2 Data bus mp Address Bus 6 Address Bus 7 Address Bus 9 N C Address Bus 14 A Bus 1 Valid Address IPL 1 Interrupt Priority IPL 1 Interrupt Priority Level lo Function Code Output 1 Ez RENE O Address Bus2 Address Bus 5 0 Address Bus8 0 Address Address Bus 0 Address Bus 12 0 Address Bus 15 O Address B
10. SCHEMATIC DIAGRAM 3 CNS Gus E cs l 1 4 TP J a EFE i 2 470 I L I GENESIS E ld ie J ss lt 4 lt a 1 lo 2 41 T 100u b DIFFERENCE TABLE FOR DIAGRAM 4 GRID MEGA DRIVE No TYPE F TYPE S TYPE SM 6 MB3S14PF G BND EF CXA1145 T6 SOP 21950 1MB3514PF G BND EF 5 E7 PCA iP CH B D 6 NOT USED NOT USED NOT USED 0 1 y NOT USED NOT USED NOT USED 12P CH E 6 12K 1 2K NOT USED 12K D 6 NOTUSED 24K 24K NOT USED D 7 1 2K NOT USED 1 2K E 5 4 7K 10K 10K 4 7K 5 4 SCHEMATIC DIAGRAM 4 ID ml DO ELS vvcc gt T OG a 2 2 v ds 5 6K N Aout 0 4 1 4uo10 E pli ps 544 GIN GOUT H Es SYNC 5 Be GRES ES COR B nse A BIN P R58 1 2k d 6 auDioo 1 4 12 E ED EN EES VIDEO 9 n PAL R48 75 220u R47 your Duct YIN 10u em io 1 2 29
11. TOSHIBA IC UPD4364G 15L SOP 28P NEC IC MB8464A 80 SOP 28P FUJITSU IC 8464 10LL SOP FUJITSU IC LC3564PM 10L SOP SANYO IC LC3564PM 12L SOP SANYO RM6264BLG 10 SOP SAMSONG IC KM6264BLG 101 SOP SAMSONG IC LC3664BML 85H SOP SANYO LC3664BML 10H SOP SANYO CXK5864CM 7OLL T6 64K IC CUSTOM CHIP FC1004 REV M5M4C264L 12 ZIP MITSUBISHI IC M5M4C264L 15 ZIP MITSUBISHI IC UPD41264V 12 ZIP NEC IC MB81461 12 ZIP FUJITSU IC 534612 12 ZIP HITACHI IC TMS4461 12SDL ZIP T I IC V53C261210 ZIP VITELIC IC KM424C64Z 10 ZIP SUMSUNG IC 5 51 262 102 ZIP IC KM424C64Z 12 ZIP SAMSUNG M5M4C264L 12 ZIP MITSUBISHI IC M5M4C264L 15 21 MITSUBISHI IC UPD41264V 12 ZIP NEC IC MB81461 12 ZIP FUJITSU IC 534612 12 HITACHI IC TMS4461 12SDL ZIP T i IC V53C261210 ZIP VITELIC IC KM424C64Z 10 ZIP SUMSUNG Remarks NTSC PAL RGB PAL RGB PAL RGB 29 Circuit No Description Remarks TR 2 FB13 FB13 EM 1 30 315 0623 315 5543 313 5063 A 313 5221 A 313 5063 313 5221 A 313 5213 A 313 5232 313 5236 A 313 5214 313 5230 230 5053 010 230 5058 01D 482 0312 482 0313 482 0312 482 0313 481 0149 01 481 5038 01 NOT USED 180 5060 NOT USED 180 5059 NOT USED NOT USED NOT USED 180 5060 270 5065 271 0044 271 0043 271 0043 271 0044 271 0045 IC MSM51C262 1025 ZI
12. 1 114 i 6 01u I 9v I I I 330 180P 18R35 1004 14 gt 4 POWER SW overs R54 1 CF4 iq 0 COMMDN FILTER ARCU _ CH DVVCC NOT USED NOT USEO DAVCC 3 R40 75 usep 19 t 479 10 941 75 GENESIS lI I l 1C108 R30 LM324 css 150 022u mm D1 152473 ceo 5600P 4 10K 10K Q Q 81 C21 RESET S 1000 USED 22 5600P 120 LED 08 2 RED 19 R21 220 2 2K x NOT MOUNTED DIFFERENCE TABLE O MOUNTED Sy P 9 EE pi For GENESIS 6 CIRCUIT BOARD DIAGRAMS 6 1 MAIN CIRCUIT BOARD Top View 4 2 12 6 2 MAIN CIRCUIT BOARD Bottom View GENESIS Ree UHR 5 For MEGA DRIVE 6 3 MAIN CIRCUIT BOARD Top View Pr cx OVA 08 24 For MEGA DRIVE iew MAIN CIRCUIT BOARD Bottom Vi 6 4 7
13. 2103 J 10 476 2104 J 10 476 2331 J 10 476 2331 J 10 476 2331 J 10 476 2331 J 10 476 2102 J 10 476 2102 J 10 476 2151 J 10 476 2221 J 10 476 2752 J 10 476 2103 J 10 476 2103 J 10 476 2331 J 10 476 2331 J 10 476 2682 J 10 479 5005 0000 479 5005 0000 477 0136 477 0136 477 0139 477 0136 477 0136 477 0136 477 0132 477 0148 390 5234 510 5019 509 5207 510 5046 212 5364 209 5061 209 5066 212 5353 EYLET CN3L 079 000003 EYLET CN3L 079 000005 EYLET CN3R 079 000003 Description RES CHIP 10kOHM 1 10W 596 RES CHIP 4 7kOHM 1 10W 5 RES CHIP 4 7kOHM 1 10W 5 RES CHIP 4 7kOHM 1 10W 596 RES CHIP 4 7 1 10W 5 RES CHIP 47ROHM 1 10W 5 RES CHIP 10 1 10W 5 RES CHIP 100 1 10W 5 RES CHIP 330 OHM 1 10W 596 RES CHIP 330 OHM 1 10W 596 RES CHIP 330 OHM 1 10W 5 RES CHIP 330 OHM 1 10W 596 RES CHIP 1kOHM 1 10W 5 RES CHIP 1kOHM 1 10W 596 RES CHIP 150 OHM 1 10W 596 RES CHIP 220 OHM 1 10W 596 RES CHIP 7 5kOHM 1 10W 5 RES CHIP 10kOHM 1 10W 596 RES CHIP 10kOHM 1 10W 5 RES CHIP 330 OHM 1 10W 596 RES CHIP 330 OHM 1 10W 5 RES CHIP 6 8kOHM 1 10W 5 RES CHIP 0 OHM 1 10W 596 RES CHIP 0 OHM 1 10W 596 R PACK CHIP 4 100 OHM 1 16W 596 R PACK CHIP 4 100 OHM 1 16W 5 R PACK CHIP 2 100 OHM 1 16W 5 R PACK CHIP 4 100 OHM 1 16W 5 R PACK CHIP 4 100 OHM 1 16W 5 R PACK CHIP 4 100 OHM 1 16W 5 R PACK CHIP 8 4 7kOH
14. Block Diagram 20 gt gt DECODER ADDRESS BUFFER Non Select MEMORY CELL INPUT SENSE SWITCH output DATA COLUMN N IC 8464 80 Parts No 315 0651 A IC LC3564PM 12L Parts No 315 0753 12A IC LC3664BML 85H Parts No 315 0766 85 Pin Layout CONTROL High Impedance IC MB8464A 10LL Parts No 315 0635 A IC KM6264BLG 10 Pars No 315 0754 A IC LC3664BML 10H Parts No 315 0766 10 OE 5V POWER SUPPLY CHIP ENABLE 1 2 INPUT GROUND WRITE ENABLE INPUT NO CONNECTION E OE WE MODE OUTPUT STATE POWER SUPPLY CURRENT espe ADDRESS INPUT QUTPUT ENABLE INPUT DATA IN OUTPUT IC6 CUSTOM FC 1004 REV Parts No 315 5660 R Outside View 208 157 6045 6046 TEST CIRCUIT SECURITY CIRCUIT YM7101 3438 FM SOUND SOURCD 53 104 n ul 105 21 Description yo Function i Name yo Function EST ame 45 M3 48 49 68000 Interface Signals 50 Gh Ere le MREQ 1 0 280 Interface Signals Port signals EEES 2 Dual Port RAM Interface Signals 58 SOUND VO Dual Port RAM Interface Signals Use This Pin Set To Open Cer tainly Z80 Interface Signals 4
15. EXP 6 670 0483 GAME CATALOG GEN 670 3264 BUSINESS REPLY MAIL GEN2 USA 670 3265 CROSS SELL POSTER GNE2 USA 670 3284 PARTS ORDER FORM GEN2 USA NOTE ACCESSORY PROVIDED MODEL No MK 1630 SONIC 2 CARTRIDGE For MEGA DRIVE Symbol No Description Remarks 610 5372 01 ASSY CP M5 REV EUR SE CONTROL PAD 610 5376 01 ASSY 5 REV EUR EFA CONTROL 400 5211 AC ADAPTOR AC240V DC9V 0 85 AUSTRALIA NEVV ZEALAND 400 5208 AC ADAPTOR AC240V DC9V 0 85 U K 400 5209 ADAPTOR AC230V 50Hz DC10V 0 85A Except U K AUSTRALIA AND NEW ZEALAND 610 5493 RF UNIT MD2 PAL B NEW ZEALAND 610 5473 RF UNIT MD2 MDU UD3631 Except 610 5473 01 RF UNIT MD2 4 NEW ZEALAND 610 5473 02 RF UNIT MD2 PAL FRANCE 600 6273 RGB CABLE MD2 UNION PERITEL CABLE FRANCE SAUDI ARABIA 672 1209 OPERATION MANUAL MULTI Except SAUDI ARABIA 672 1328 OPERATION MANUAL MD2 RSA SAUDI 671 3127 02 BOX 8 PACR SET 2 MULTI 1630 1630 671 3127 04 BOX amp PACR SET MD2 MULTI 1685 1685 671 3127 05 BOX amp PACR SET MD2 MULTI 1686 MR 1686 671 3127 06 BOX 8 PACK SET MD2 MULT 1695 1695 671 3124 02 MD2 MULTI 1630 1630 671 3124 04 MD2 MULTI 1685 1685 671 3124 05 MD2 MULTI 1686 1686 671 3124 06 MD2 MULT 1695 1695 SGM 4216 POLY 260 x 320 X 0 05 EXP 6 SGM 4217 POLY 200 300
16. M W COMM R PACK CHIP 4 2 2 W COMM LED GL3PR8 TACTILE PUSH SW SKEVAA TACT SW SKEVAA ALPS PUSH SWITCH JPR0010 Z091 SMK MINI DIN CONN 9P TCS7913 43 EDGE CONNECTOR 64 PSB4D32K 7R D SUB 9P 2 UC0082 21410 0 CONN DC JACK EIAJ3 HEC3100 EYLET 357 EYLET 6 3 5 8 EYLET 3 5 7 Remarks NTSC S SM NTSC F PAL RGB 35 Circuit No EYLET CN3R TS CN5L EYLET CN5L TS CN5C EYLET CN5C 36 Parts No 079 000005 012 P00308 079 000001 012 P00308 079 000001 012 P00308 079 000001 Description EYLET 613 518 TAP SCR PH 3 8 EYLET 2 3 7 TAP SCR PH 3 8 EYLET 2 3 7 TAP SCR PH 3 8 EYLET 2 3 7 Remarks 8 4 ACCESSORIES PACRAGE LIST For GENESIS Symbol No Parts No Description Remarks 610 5571 01 ASSY CP M5 USA CONTROL PAD 400 5135A AC ADAPTOR AC120V DC10V 0 85A 400 5135A 01 AC ADAPTOR AC120V DC10V 0 85 400 5135A 02 AC ADAPTOR AC120V DC10V 0 85A 400 5135A 03 AC ADAPTOR AC120V DC10V 0 85 610 5472 RF UNIT GEN2 MDU VA3431 610 5472 01 RF UNIT GEN2 MDQT2A801A 610 5472 02 RF UNIT GEN2 TOWA NTSC 672 1208 OPERATION MANUAL GEN2 USA 671 3379 01 BOX amp PACK SET GEN2 USA 1630L MK 1630 671 3379 02 BOX amp PACK SET GEN2 USA 1614L MK 1614 671 3373 01 MA CTN GEN2 USA 1630L MK 1630 671 3373 02 MA CTN GEN2 USA 1614L MK 1614 SGM 4216 POLY 260 x 320 x 0 05 EXP 6 SGM 4217 POLY 200 300 x 0 05
17. MB 271 0006 EMI FILTER STB271KB 271 0007 EMI FILTER STX222MB 150 0418 CAP E 10UF 16V U TYPE L 5MM 150 0023 CAP E 10UF 16V U TYPE 20 150 0023 CAP E 10UF 16V U 20 150 0023 CAP E 10UF 16V U TYPE 20 150 0023 CAP E 10UF 16V U TYPE 20 150 0023 10UF 16V U 20 150 0023 CAP E 10UF 16V U TYPE 2096 150 0023 CAP E 10UF 16V U TYPE 20 150 0023 CAP E 10UF 16V U TYPE 2096 150 0023 CAP E 10UF 16V U TYPE 2096 150 0023 CAP E 10UF 16V U 20 150 0412 CAP E 220UF 6 3V U TYPE 150 0023 CAP E 10UF 16V U TYPE 2096 NTSC S SM 150 0412 CAP E 220UF 6 3V U TYPE F PAL RGB 150 0023 CAP E 10UF 16V U TYPE 2096 150 0159 CAP E 220UF 16V U TYPE 150 0047 CAP E 100UF 10V U TYPE 150 0062 CAP 47UF 10 U TYPE 150 0062 CAP E 47UF 10V U TYPE 150 0023 CAP E 10UF 16V U TYPE 20 150 0023 CAP E 10UF 16V U TYPE 2096 150 0023 CAP E 10UF 16V U 20 150 0047 CAP E 100UF 10V U TYPE 150 0062 CAP E 47UF 10V U TYPE 150 0062 CAP E 47UF 10V U TYPE 150 0062 CAP 47UF 10V U TYPE 150 0062 CAP E 47UF 10V U TYPE 150 0062 CAP 47UF 10V U 150 0023 CAP E 10UF 16V U TYPE 20 150 0023 CAP E 10UF 16V U TYPE 2096 150 0023 CAP E 10UF 16V U TYPE 2096 150 0023 CAP E 10UF 16V U TYPE 20 1 2 3 4 5 6 7 8 wo 31 Circuit No ONO b WH OO
18. P IC 424 642 12 ZIP SAMSUNG IC LM324 SOP IC BA10324AF T1 SOP ROHM IC LM324 SOP IC BA10324AF T1 SOP ROHM IC CXA1145M T6 SOP SONY IC MB3514PF G BND EF FUJITU IC RA2195D SAMSUNG IC UPC7805HF NEC IC TA7805S TOSHIBA XTAL OSC 53 693175 MCO 7020D 1 OSC 53 203424M 20PPM SYOVVA XSTR 25 4177 CHIP M6 7 XSTR 25 4081 CHIP ROHM XSTR 25 4177 CHIP M6 7 XSTR 25 4081 CHIP ROHM DIODE 182473 RADIAL DIODE 15 35 100A RADIAL NOT USED PEAKING COIL 100UH O3TYPE RA NOT USED PEAKING COIL 12UH 03TYPE RA NOT USED NOT USED NOT USED PEAKING COIL 100UH 03TYPE RA COMMON FILTER CM04RC04 BEADS INDUCTOR CP BK2125 HS121 BEADS INDUCTOR CP BK2125 HS601 BEADS INDUCTOR CP BK2125 HS601 BEADS INDUCTOR CP BK2125 HS121 EMI FILTER STB101KB NTSC S NTSC F PAL RGB NTSC SM NTSC PAL RGB NTSC F S PAL RGB NTSC SM NTSC F S PAL RGB NTSC SM PAL RGB PAL RGB Circuit No Parts Description Remarks 271 0045 EMI FILTER STB101KB 271 0007 EMI FILTER STX222MB 271 0007 EMI FILTER STX222MB 271 0007 EMI FILTER STX222MB 271 0007 EMI FILTER STX222MB 271 0007 EMI FILTER STX222MB 271 0007 EMI FILTER STX222MB 271 0007 EMI FILTER STX222MB 271 0006 EMI FILTER STB271KB 271 0007 EMI FILTER STX222MB 271 0007 EMI FILTER STX222MB 271 0007 EMI FILTER STX222MB 271 0007 EMI FILTER STX222MB 271 0007 EMI FILTER STX222MB 271 0007 EMI FILTER STX222MB 271 0007 EMI FILTER STX222
19. SEGA SERVICE MANUAL GENESIS II MEGA DRIVE II PAL B I G RGB ISSUED JUNE 1993 SPECIFICATIONS IDENTIFYING PARTS DISASSEMBLY BLOCK DIAGRAM SCHEMATIC DIAGRAMS CIRCUIT BOARD DIAGRAMS PARTS SPECIFICATIONS EXPLODED VIEW amp PARTS LIST 8 1 EXPLODED VIEW 8 2 MECHANICAL PARTS LIST 8 3 ELECTRICAL PARTS LIST 8 4 ACCESSORIES PACKAGE LIST Sega Enterprises Ltd Before Using This Service Manual This service manual includes data for the GENESIS and MEGA DRIVE Parts of the circuits are different in the GENESIS II depending on the model of IC11 RGB encoder used Check the model of IC11 on the main circuit board and identify the type S or SM IC MB3514PF G BND EF 313 5232 IC CXA1145M T6 SOP 313 5213 1 2 1950 313 5236 MAIN C B Viem Differences in the circuits are shown in the difference tables in the schematic and circuit board diagrams In the parts list differences shown in the REMARKS columns 1 SPECIFICATIONS RATINGS MEGA DRIVE GENESIS II PAL B PAL G RGB Povver input 120V 60Hz AC220V S0Hz 220 50 2 Power consumption 18 W 18 VV Usable temperature Humidity 5 35 C 20 80 RH non condensing Dimensions 220 VV X 212 D X 59 H mm SPECIFICATIONS 68000 8M amp Z80A 4M 72k bytes Memories 64k bytes SEGA custom LSI Display Regular color TV Display c
20. SM NTSC F S PAL RGB NTSC SM NTSC F S PAL RGB NTSC SM NTSC S NTSC F PAL RGB Circuit O N C Parts USED NOT USED NOT USED 151 0265 151 0265 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0307 151 0311 NOT USED 151 0354 151 0311 151 0307 NOT USED 151 0265 151 0336 151 0401 476 2121 J 10 476 2222 J 10 476 2472 J 10 476 2222 J 10 NOT USED 476 2122 J 10 476 2222 J 10 NOT USED 476 2222 J 10 476 2103 J 10 476 2103 J 10 476 2103 J 10 476 2103 J 10 Description NOT USED NOT USED NOT USED CAP CER CP 0 1UF 25V ZF2125 CAP CER CP 0 1UF 25V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V 2F2125 CAP CER CP 0 022UF 50V 2F2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 0 022UF 50
21. US 8 bit m ome CPU 780 2 REGULATOR 1 oma ee AC ADAPTOR lt ic DATA BUS 8 bit IC5 04364 15 RAM 8KB GN5 CN6 1 1 1 I 1 1 1 1 1 1 1 I SIS e pee Lo rou p asc YOLK sss o mames En 1 1 1 1 1 1 I 1 i 1 1 1 l 1 1 1 I 1 1 I 1 1 I I 1 L CONTROL PAD CONTROL PAD 1 PLAYER 2 PLAYER OPTION 5 SCHEMATIC DIAGRAMS 5 1 SCHEMATIC DIAGRAM 1 c lt 6 i351 gt 2 NOT USED 931 IAT CANALOSG lt gt lt PATO gt lt PSTo GL gt Rai RAG d gt 1000HM 22 BS RE ACS 8 c9 47P Do iii 9 za ce 33P CCL CCE bPU uU awu omo onu POTU oo MOT ozcoe lt N N lt lt lt H Q lt c 3 x c7 100P K a 12212 i gt lt 1 gt gt gt gt gt gt lt gt lt gt lt gt FC1004 SGE 1 2K NE HS121 2 2K c10 10 05 1 Value 2222 34 2 VCCt
22. V ZF2125 CAP CER CP 0 022UF 50V ZF2125 CAP CER CP 5600PF 50V KB2125 NOT USED CAP CER CP 100PF 50V CH2125 CAP CER CP 5600PF 50V KB2125 CAP CER CP 0 022UF 50V ZF2125 NOT USED CAP CER CP 0 1UF 25V ZF2125 CAP CER CHIP 12PF 50V CH2125 C PACK CP 33P 16 W COMMON TDK RES CHIP 120 OHM 1 10W 596 RES CHIP 2 2kOHM 1 10W 596 RES CHIP 4 7kOHM 1 10W 5 RES CHIP 2 2kOHM 1 10W 596 NOT USED RES CHIP 1 2kOHM 1 10W 5 RES CHIP 2 2kOHM 1 10W 5 NOT USED RES CHIP 2 2kOHM 1 10W 596 RES CHIP 10kOHM 1 10W 5 RES CHIP 10 1 10W 5 RES CHIP 10 1 10W 5 RES CHIP 10 1 10W 5 Remarks NTSC SM NTSC S SM NTSC F PAL RGB PAL RGB PAL RGB Circuit No 12 011 0101 1 01 2 1 21 201 01 0011211111 R R R xx Parts No 476 2100 J 10 476 2151 J 10 476 2102 J 10 476 2100 J 10 476 2151 J 10 476 2102 J 10 476 2473 J 10 476 2513 J 10 476 2153 J 10 476 2473 J 10 476 2513 J 10 476 2153 J 10 476 2473 J 10 476 2473 J 10 476 2750 J 10 476 2750 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2752 J 10 476 2122 J 10 476 2123 J 10 NOT USED 476 2222 J 10 476 2750 J 10 476 2562 J 10 476 2562 J 10 476 2562 J 10 476 2102 J 10 476 2243 J 10 NOT USED 476 2102 J 10 476 2103 J 10 NOT USED 476 2122 J 10 NOT USED 476 2102 J 10 476 2331 J 10 NOT USED 476
23. apability Colors 512 VIDEO Video outputs RGB Control terminals 2 control pad etc can be attached Reset button Game restart function Slots For cartridge and extension Design and specifications are subject to change without notice 2 IDENTIFYING PARTS 2 1 FRONT 8 TOP VIEW OF CONSOLE CONSOLE Cartridge Slot lt gt lt gt Power On Indicator Control Port 2 Power Button Control Port 1 Directional Button D Button Start Button Button A CONTROL PAD 2 2 BACK VIEW OF CONSOLE Reverse Side A V OUT Jack Extension Compartment A V OUT ADAPTOR 2 3 ACCESSORIES GENESIS II RF Unit AC Adaptor TV OUT SEGA RF UNIT MODEL NO MK 1632 NTSC M VA CHICHA ANN CH SELECT A 4 3 MEGA DRIVE RF Unit Peritel Cable Sega 16 bit Game Cartridge v ANTIN WOUT SEGA RF UNIT Except French mode French model only Provided or Sold separately AC Adaptor Except U K U K Australia and New Zealand Austraria and New Zealand 3 DISASSEMBLY 3 1 Dismantling procedure Removal of bottom screws and top case 1 the power button off 2 Turn the unit over See Fig 1 3 Remove four screws 202 4 Remove case 1 Main board removal See Fig 2 1 Remove nine screws 201 2 Remove the shield plate 3 Remove two sc
24. ll up resistor is added externally Non maskable interrupt request signal This interrupt request has priority over the maskable interrupt and does not depend on the state of the interrupt enable flipflop Halt signal 0 is output when the MPU executes HALT command and is set to the state Memory request signal 0 15 output when there 15 an effective address for memory access on the address bus MRFQ also goes 0 together with the RFSH signal during memory refresh BUSACR BUSREQ 0 15 Function Input output request signal 0 is output when the address for input output is on the low order 8 bits A0 A7 of the address bus when an input or output is given The IDRQ signal 15 also output together with the MI signa when an interrupt is acknowledged to inform the peripheral 1 51 that the interrupt response vector can be superimposed on the data bus READ signal 0 is output while the MPU can accept the data from a peripheral 151 The data in the designated LS or memory is gated by this signal and can be superimposed on the MPU data bus WRITE signal This is output when the data to be stored in the memory or peripheral 1 51 is superimposed on the MPU data bus Bus acknowledge signal When the BUSREQ signal is input the BUSACK signal informs the peripheral LSIs that the address bus and data bus of the MPU and the MREQ RD and WR signals have bee
25. n set to high impedance WAIT signal The WAIT signal informs the MPU that the designated memory or peripheral 151 is not ready for data transfer The MPU continues in the wait state as long as the WAIT signal is 0 Bus request signal The BUSREQ signal requests to set the address bus and data bus of the MPU and the MREQ RD and WR signals to high impedance BUSREQ is usually used as the wired OR and a pull up resistor is connected externally Reset signal The RESET signal initializes the MPU and should be active 0 for at least 3 clock signal periods Signal that indicates machine cycle 1 0 is output together with the MREQ in the command operation code fetch cycle When 2 byte operation codes are executed MI is output each time the operation code is fetched MI is output with the IORQ signal in the mashable interrupt acknowledge cycle Refresh signal 0 is output when the address that refreshes the dynamic memory is the lovv order 7 bits of the address bus The MREQ signal also goes active 0 in this state power supply 16 bit address bus Address the memory and input output ports The address for refreshing is output during refreshing 19 5 IC UPD4364G 15L Parts No 315 0546 A IC LC3564PM 10L Parts No 315 0753 10 IC RM6264BLG 10L Parts No 315 0755 A CXK5864CM 70LL T6 Parts No 315 0773 A ll Outside View Operation Mode
26. rews 203 4 Remove the main board from the bottom case 2 Fig 1 3 2 Reinstalling procedure Main board reinstallation 1 Attach the 64 pin cover 8 2 Attach the main board to the bottom case 3 Tighten two screws 203 4 Attach the shield plate 5 Tighten nine screws 201 Top case reinstallation 1 Turn off the tactile power switch TACT SW on the main board 2 Attach the top case 3 Engage the top case with the bottom case Tightening the screws on the bottom case 1 Turn the unit over See Fig 1 2 Tighten four screws 202 Fig 2 4 BLOCR DIAGRAM ANTENNA GAME CARTRIDGE PERIPHERAL DEVICE 84 001 2 DS DE RS SE LE SE 107 IC8 i 04 1264 V RAM 64KB i 53 METTUS DRIVE i 53 693175 GENESIS ID SMHZ IC6 IC11 VCLK 7 6BHZ FC1004 183514 VIDEO III 64P meum 60P uc UNIT l Es se 68000CC L RGB ENCODER VIDEO AUDIO 1 ME NES 2 1 AUDIO S E Den mx 20 SYNC 106 N SQ MIX o FC100 FC1004 PORT L liit UI i I I I I I 1 i l 1 1 i I i I i l I i BUS ARBITER da 1 0 VIG Y 02 162 IC3 104 042832 15 280QFP 166 IC12 FM SOUND SOURCE FC1004 7805 a B
27. us 18 Power Input a O Address Bus 23 Data bus 14 Ho eee yo LOEO T NEN UDS O Upper Data Strobe W O Readwite LES IC TT TI CETT IC2 3 IC HM65256BLFP 10 Parts No 315 0547 I0A TC81832AFL 10 Parts No 315 0759 10A Outside View Operation Mode IC TC51832FL 10 IC TC51832AFL 85 Parts No 315 0677 A Parts No 315 0759 85A IC LH5P832N 12 Parts No 315 0760 12A W Pin Layout 17 18 IC4 IC Z84C0006 IC UPD9033GB 4 3B4 IC TMPZ84COOAU 6 Parts No 315 0738 R Parts No 315 5676 R Parts No 315 0782 R Bl Outside View one lt lt lt lt lt Z lt lt lt lt lt 2559895 CLK NC 04 42 5 D3 43 4 05 4 4 06 E A5 2 6 Al 02 7 07 VSS RFSH Di io Mi NC Cli RESET Description CLK 2 5 D7 7 10 00 0 VO Q mn o AAD 7 2 Function Single phase clock input When the clock input is set to DC 1 or 0 level continued the MPU stops and holds that state 8 bit bidirectional data bus 5V power supply ns Not connected internally Set to open Maskable interrup request signal Interrupts are given by a peripheral LSI When the interrupt enable flipflop 15 set to 1 by software the interrupt is accepted INT is usually used as the wired OR and a pu
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