Sega Mega CD Maintenance Manual
Contents
1. CD 7075 1C Ver 0 95 92 04 27 3 SEGA ENTERPRISES LTD 2 WAH MEGA CD CHECKER PART No 610 0276 ge 7 WfzrzvyZ KV DIP SWI 2 ON POWER ON WERHN D 1 2 1 POWER ON 4z77 DTR SWOON OFF MON ZATAUtYk OS ROM SUDCPU2. Ver 0 95 92 04 27 SEGA ENTERPRISES LTD 2 AMAA MEGA CD CHECKER PART No 610 0276 I CD ON DIP SW ON Ver 220 23 Croto EUR RIE MEGA CD MAIN BD SUB BD lt START lt WORD RAM IM DMA 3 2 5 7 4 0 5 8 ET START WORD RAM 2M DMA
3. o e 1 D 1 P SW2 3 OFF Yer 0 95 92 04 27 10 SEGA ENTERPRISES LTD errs 8202 BALA MEGA CD CHECKER PART 610 0276 ee CD ON DIP SW1 5 OFF ON Ve r UUM IC MIR MEGA CD MAIN BD SUB BD START WORD RAM 1M DMA 3 2 5 7 4 0 5 8 CHMCMAWY HOVE
4. OFF 5V 9 V Ver 0 95 92 04 27 17 SEGA ENTERPRISES LTD 2 9 9 1 MEGA CD CHECKER SWITCH BD MEGA CD CHECKER 1 PART No 610 0276 RB MAX MIN PP2 mean x VREFL 0 66 0 86 V 0 75 V 65 306 0 70 0 86 V 0 80 V VREFH 3 35 3 65 V 3 51 V 62 587 3 35 3 60 3 44 V x 4 85 5 15 V 4 98 V 62 638 4 86 5 06 4 99 V MWRERKM O 23V 2 48 V 66 537 2 25 2 87 V FAAEE 2 55 3 20 V 2 73 V 64 662 2 31 3 10 V 2 32 V 727070 4 65 4 90 V 4 78 V 62 544 4 70 4 88 V 4 79 V et x 1 84 2 02 1 93 V 64 693 1 88 2 00 V 1 94 V 4 85 5 15 V 4 99 V 62 537 4 89 5 08 5 01 V 2 55 3 20 V 2 71 V 66 342 2 36 3 09 V 2 55 V x 5 VA 0 000 0 030 A 0 032 A 106 572 108 0 027 0 09
5. El DIP SW2 3 OFF Ver 0 95 92 04 27 SEGA ENTERPRISES LTD Foy Aik 2K EIL MEGA CD CHECKER PART No 610 0276 6 Leve1 1 Error Level 2 Error Level 3 Error ERELIOCLHUBZIEMTERF EK LI VAWOKFEWMKE EET 5 Leve1l 3 Error UH E JS AR O CA Jj 7e 5 LL fU D IL HR EE MOT UE Y Level 3 ERROR CODE 300 no used 301 POWER SHORT ERROR 302 POWER OFF ERROR ALL OFF 303 POWER ON ERROR ALL OFF 304 5V CURRENT ERROR 305 9V CURRENT ERROR 306 5V VOLTAGE ERROR 307 POWER OFF ERROR DC ON 308 POWER ON ERROR DC ON 309 399 no used iR 0302 30744 POWER OFF ERROR 303 30813 Level 2 ERROR CODE 200 no used 201 BUS SHORT CHECK ERROR 202 PROGRAM RAM ACCESS ERROR 203 COMMUNICATION COMMAND R W ERROR 204 SUBCPU LEVEL 2 INTERRUPT ERROR 205 FC
6. 85 5 CD MAIN BD VR1 CD LED 3 00 0 01 5 6 CD OFF DIP SW2 2 ON CD eo CD MA IN BD RAM BD 2 CD OF 5 3 M U REN Eh REM hu 5 2 ERLTDSERMEOFFLTFEN MEGA CD MEGA CD Ver MODE START L START BURT 05
7. ON er 0 95 92 04 27 14 SEGA ENTERPRISES LTD Pe ARE mam Dip Switch1 58 51 X 7 58 S76DMAX7 50Wl amp tf S7 DMAN3T 50W amp t frbue S6 DMA S6 DMA S 5 55 S4 S4 S4 54 S3 S3 S2 S2 S1 ON MZ Dip Switch2 S8 S1 S805 ON S7 ON S 6 S5 S5 S40 54 EE LEE t Mtf S3 lW 5 E MIAMI GA Do S2
8. ET START EMT 5 11 SEGA SEGA B B tn LUSK BRAVET EA Lie FRR EMU START CD 1 1 MEGA CD SUB BD
9. ERROR BOARD3 GOOD BOARD GOOD BOARDI GOOD BOARD2 GOOD BOARDS ERROR TOTAL ERROR ERROR TOTAL1 ERROR ERROR TOTAL2 ERROR ERROR TOTAL3 ERROR LIERR TOTAL Level1 1 ERROR TERR TOTAL1 Level 1 TERR TOTAL2 Level 1 ERROROBA TERR TOTAL3 Level 1 ERROR 2ERR TOTAL
10. II MEGA CD SUB BD RCA CD P A CD 02 LADY TVE 5 VOL UP MAY NE VOL DOWN AA ET VOL UPJ VOL DOWN
11. 5 4959 3 FO A32 28403 4 C 9 22 Ver 0 95 92 04 27 16 SEGA ENTERPRISES LTD FILIAL 2 ASA MEGA CD CHECKER PART No 610 0276 B BRITY MMI COIVY KERFLOMINERF FEDVFELAIMS KRIS SE TOMA EMASWA THES Q SOR 02 TL 55 MHEMT LAW COIVY NL TORADORA 1 1 C Wi VET 95 2 C 8
12. X No PIN nane 170 FUNCTION 1 CH 1 dar 2 Vre R ISTE H AJR r 4 5 F2 o z DATA MSB 7 LRCK I LR29022AZWNT LRCK H LRCK L CH2 8 TEST VFA Gi L 9 ATT 7 Fab SBM 10 SHIFT 1 Ta FAT IHN ODA MET LATCH LF FoF 7 OVIANMT 12 INITD AJ GIH AYDD DVDD BCLK DATA TEST ATT SUIT LATCH INITB TEST Dip 1 T J t nf 1 AGND u 6 ul DCND 1 ul Test nl Move soci DI soc n osx runi PIN name 170 FUNCTION 1 13 TEST VFA GURL E I M eg 1 1 DIN 9 ea T AMIRI PULL DONN WE Fr aum PELL DOWN 0 LVI PIN PIN WER PIN MFP 28 3 GR LU PULL T4 PINRGN DMT 29972171 392Fs 384Fs 448Fs 512Fs ka FEMA JINT HECK GND WEE DAC CH MWY OLTAGE PIN 75 1 DONX 57 SUB
13. h 2 D CD MAIN BD D1P SW2 2 OFF RL RUDA ON CD ON TV 5 1 MAW GMM 05 2 A 05 3 7 5 4 HEF C l5 3
14. CD ON DIP SW1 5 OFF ON ROK MRM MM AVISO PEED FAM Troth VA MEGA CD MAIN BD SUB BD START WORD RAM IM DMA 3 2 5 7 4 0 05 8 START WW WORD RAM 2M DMA 3 2 5 9 4 0 85 10 START
15. RAM RAM NN W u en omo WORD RAM 297 i 1 M 2M 1 MM WORD RAM 2Z80 Ver 0 DURCH MULT 947 4277 KE ZK 72747 AIF 77 miski WORD RAM 1M DMA DBNEBNTITTY WORD RAM 2M DMA 775 552 DBNEEHERT 22TY5 CD TOC CDC RAM DMA 1 IMEGA CD RCA RGB FARRE RMB RUTER AT Ver 0 95 92 04 27 95 SEGA ENTERPRISES LTD 24 xy Atk 2K AMA MEGA CD CHECKER PART 610 0276 5 EP CD RAM BD CD
16. ers 100pF 100pF enc vcca cas 540 FE 8T PDATA 8 c24 100u 1 d i Jo d d 0 al vcca 4 c22 0 022uF ha 00pF NPWCLK 71 PBELK PLRCK 6 Fes FBA04 28 VREFH VREFL AGND LC7883KM VREFH2 VREFL2 GND GND 1 WCLK2 VREFL1 F FB1 c23 0 1uF JUMPER 1 Cii 10uF 10uF R24 jour 4 7K cis c17 cia B200pF ces 2200pF c36 Rig 142 4 7 B200pF R17 4 7K m Ris 4 7 IC4D esoopr 10uF c34 8200pF 2 2K Ris AVEC 10 TRI c1623 R32 10 Br 1623 SL2 3 3K 10uF FBA04 00 MINI JACK R35 R36 75 275 zesc 1 ng 47 Re g B 4 7K uPce44 330 JACK d 4 7K ICSD EM2 Caral gt PER uPC844 330 R12 4 7K itle 837 8046 01 SEGA ENTERPRISES LTD PC BD MEGA CD SUB BD Document Number 171 6115C c December 9 591 IC BD MEGA CD SUB BD 64 150pF NOT USED J14J16J18J20 46 J8 010012 JS 07 J9 411413 4154174189421 ABA 200 4 MOKA
17. d 15 11 SEGA ond LU SEGA B MU MIEL FAO B M SEGA OD ZO E ES FH B 20 SEGA START CD 1 1 MEGA CD SUB BD MEGA CD MAIN BD
18. 3 2 5 9 4 0 5 10 START 15 11 SEGA bake FUE bdPE EMU SEGA TELS 222 0150 XU WHI Sia ent Beate U Eq B MU MMEIYFLTFEN BRA SEGA DB SEGA START O CD 1 1 MEGA CD SUB BD
19. Z 91 11 5 Ver 0 90 0 MEGA CD p2 9171175 0 919707 280 RZ W CHECK 91 11 13Ver 0 9 2 DMA RAMA RFA MICRA AF YSFK MEGA CD p3 91 12 72 Ver 0 93 91 12 11Ver 0 94 NTSC PAL 92 7 3 9 Ver 0 95 V CD MA IN BD RAM BD
20. S2 1A014 43 7 S1 ON Bx H AMMA MEGA CD CHECKER PART No 610 0276 Fry270 8M WORD RAM DMA WORD RAM DMA7Zzv2 tT ST EH UAT WORD DMA x gt 2 S 7 OFF 15 2 1 SM 5 2 n M S 8 OFF MAIN BD S 8 OFF S 5ON ON fri 2727n l
21. 1 JY PCM FM CD TV CD FM MEGA CD PCM E54 FM CD TV CD 3A SA MASK LY J AOE E BD LED BD O R CAA 21 YZ PV b l J VS E I 3y E Z z 2 LET ODOFA EM ME EJ 1
22. sana SQFP 208 SQFP 208 208 01 S 11 1023 004 50 77 _ 0 0 MIN ISTAND m Pa H 0 251010 5 501 004 1 1 1 0 20008 1 0 151 006 1 L La 1520 05 1 006 2 002 onoroo4 1990 FUJITSU LIMITED F2080015 2C 1 I mm inches Reet yd ve ve Id vo E 5 ve ve uc me jojo om uc le roles ET DRESCH om Lol Be i o fores om e e om ta oorr sl o ono nl velte ber i Jee o ker om s tier ke meu o i oom om on Per mcu om om Selen mcu ellepe ucu _ ele Por mcu lor 12 vo Beans Le mcu Pesbr mes EJ jor vo jor macu 24 vo sta me
23. MSANENS 94 DAC4 7 1 0 DACH RAMAD6 1 0 Pseudo SRAME ORBANI SRAMEOROT bD4c7 D4C3 L 9 95 RAMAD5 1 0 MROM SHR 7 7 9 95 MR OM SRAMEOROT 2 nanena DACTIOLNESHLTTYINH WELARE YUTWOACAENTSI K90790 YUTWOACHENTELRIOYINE DAC 20 2 XOUT KAURTONHUNT DAC F MSB ALMA TESTI L ME TEST2 QU TESTIMFUMROMRIL TESTI vcc ELCEA 95286 r T2422 a 40 83790 SOP 15 FPT 16P M06 MB3790 16 we zor 1 1 NC MURAT OA i wo Wm qevicr SOP 1 HRT CY At RROD FAM RET Hs MILIDRUECEIF Vs r MU SIERIRT C d VAM AMIR ETT Med 7 7217 DEE
24. pse ESE HA AL H 44 vosc our vege ii 9 8015 01 eel 837 8045 04 BD MEGA CD MAIN BD vece d eus SEGA ENTERPRISES LTD 1 100uF ESA VNCDCG PC BD 022uF Thi MEGA CD MAIN BD S Mapa 160 LED GREEN c1623 D tz CNT 74 245 25P ANGLE lt EDATO 31 veca 38 0 022uF CN COPPE TE DD A e lt err s T 0 15 RAMA12 HS RAMA13 RAMA14 315 5476A n Ei lt 810 tg gt css 33pF NOT USED 837 8015 04 BD MEGA CD MAIN BD SEGA ENTERPRISES LTO PC 8D MEGA CD MAIN BD Document Number 171 6105 01 Sheet 3 of 4 bi Ee H i 7 IAsEL DASS lt 6616 3 gt 0 022uF 57 CASO IBCLKB 4 Rz 6 100pF NOT USED SS 5 vece SA 5 voca R E ICi9A veca 86 74AC74 14 vcce 12160 cas 1 022uF Tances CcT o 15 gt 5 SECH Bes 10468 lt gt 7 5 4 lt PATO SI 0 022uF MB88464A4 80 100uF CON 21 19 gt 32 2 31 gt gt cso 0 022uF 837 8015 01 BD MEGA CD MAIN BD SEGA ENTERPRISES LTD itle Dooument Number REV MBro 532 Sheet 4 of EI n
25. 1F 5 LSB LSI PWMDAC URREA 5V TSTOUT FAFMEDAF Weis 7ZCUT85 lt SANYO MFP20 iz rsri EG EEN 13 1572 UK IF H MSB 9LSB 5 lt 15 GND is DORA MM nm GNOME SRE AMAF OORT NO CONNECTION BNAF 99 uP C844 Top View 24 SOP 225 mil T i n wPCRUC BUG SUB BOARD 1 3 4 5 1 1 MEGA CD EUROPE PARTS LIST E qo LINE co gt m c to were o o tototo one ne C2 AD to to www one PARTS LIST PART NO DESCRIPTION LOCATE PCB LED LD1 LD2 IC2 IC3 104 104 165 106 1C7 1C7 IC8 IC8 1 9 1010 1010 1011 1011 1012 1012 1012 101
26. 8 1 zt SFT DH Eie WA N NARATS LMSMAR TI DVI 7 CY ARRIEN EDE NKRARELUMLET RAREN v grou BREHUEUA f FCU WIREL ANETTE ESA MT VASA 3 Te SRAMOMAMEAULG RW FOE AU SRAMOCES CS et MARLCBAAMEEL bea REN SOMTEGNDEG 27f7 I RLCHU AM ERIEL ET meto SIT CT v _ s ven me ALARM 1 ACARI u neset o E E n RESET ras wo qu 1 Al Bula v MAMEL SARUM TTY my svi ANMERT SVITT CONTROL FARR AIRE TT 1 7777 ree T CONTROL RESET 2 mn nenes 1 TC511664BJ BZ 80 10 NO 2 8 MAIN BOARD IC7 8 1 1 zip wos won won wis Yn vor vol vos wor EEUU IR Y i E wor 006 wos vow Vos vos
27. u ZA LLL Sak 2Eev 1885 VN i T A II rd 22 O O PC BD MEGA CD MAIN BD Sold sae
28. OOGGG BLOCK DIAGRAM i2o 7 rame ruler ADDRESS AN 0 3 6 0 3 ns o 0 maue dam pr pc o RAKCIB 1 RAHCZD no 77477 9 DES nt Dkem em po N ROA IR csno ITST o gt TEST c o gt 3 n xour FESETm 74 MAIN BUARD 103 2 2 RAMAD4 1 0 3 1 0 RAMAD2 1 0 RAMADI RAMADO RESETB 1 ras E 1 RAMA14 RAMA13 2 10 1 RAMA12 SRAMLMROMOKEQ7KEU XR 9 1 RAMAL1 o t RAMALO 7 RAMAS 1 RAHAB 5 1 RAMAT EN A4 1 RAMAS 1 RAMAS SRAMkMROMOTQG7FUXIS 1 2 Ae RAMA4 AL 1 Ao 1 RAMA2 07 170 RAMA1 De 170 RAMAO ps 170 RAMAX o Du 1426035 RAMC2B 3 2 64 FOSRAMUMROMELIPAS 170 RAMCIB FIBA FOSRAMUMROMEVI NAS D2 170 Pseudo SRAMLSRAMOSIFGOS DL 170 RAMOEB Pseudo SRAMLSRAMLMROMOU VOS Do 170 DAC EN 2 G DAC R T 57 L ROB 1 v42037Ez2 w5AD amp RA U F pacs wv 7v220 WRB 1
29. CARY FR KORMMBF F EMBL ATED HID JK U AU RAMH FOWMLETA 2 5 24 2 RAM CD vx 2 2 gt O34045 5 1 Ver 0 95 92 04 27 15 SEGA ENTERPRISES LTD 2 MEGA CD CHECKER PART No 610 0276 CD MEGA CD F yn ZURE pl 9171078 Ver 0 50 91 10 23Ver 0 80
30. MEG CD MAIN BD 1 MEGA CD PCM M CD TV CD FM PCM FM CD TV CD EI MEGA CD MAIN BD LED CD 5 1 2
31. TAARE SLAM e ROT Ver 0 95 92 04 27 4 SEGA ENTERPRISES LTD DEE Ra 2 EMMA MEGA CD CHECKER PART No 610 0276 DIP SW1 5 OFF POWER ON WARRAUA RYT d 4x KAU a YR at 1 4 POWER ON ETR SWOON OFF RMON OS ROM SUBCPU CPU MC E kf th R AM 1727 27 7 477777 1 77 REREAORMRUE OF 15797 77UE 0890542377 BEERANENANTON e RAM R AM EMULE saman z77 ESPETET TS R W NN W ENTE LED
32. DS 15 vo stor for mcu s vss 151 m Tue fire vss lee r meu r mcu 153 macu 113 vo vos r sr macu 1ss wolao s macu Jas volivas 150 vo r volivare vo res Jas mcu lor mes fiaa voo ol Por macu lt br lor macu r Per mcu ove lor ve areas Jas r we ii vo lor meo i rela 164 vss wl vss 1 avait Tue le r 191 vo avos r me om 192 r we om 193 ele r w om isd of r vele om elen DES im lor wacu_ ise wojavos DES m lor macu 191 DES m me PE me elen macu vo mas o MAIN BOARD IC2 2 3 FUJITSU GA MALO AR 315 554 Z 47 CPU Feo MWA AL IRoM CPU AN Boc COH VfL CPU r ARNG SBS IE 6 2 5 LROM 1RAS2 LEDC Ku 9 4 gt ANS IUWR ILWR IRoM IRAS2 o 1 4 xb h te 5 IRAS2 LASEL IC
33. 2 Saz MEGA CD CHECKER PART No 610 0276 10 92 3 79 381131 92 4 28 2 ES4 Ver 0 95 92 04 27 23 SEGA ENTERPRISES LTD MEGA CD EUROPE PARTS SPECIFICATION MAIN BOARD 1 1 1 3 emm mee st wc 35 D 2 DTACK 36 As D68HC000 RES Gee 88 38 5 CLK 6 HALT 40 Ve 7 VMA 41 RES 8 42 VPA 9 BERR 43 IPL 10 vc 44 ifo n FG 45 12 Fco 46 N C 13 A 47 14 48 15 49 Lie so 17 Ay 51 Ay 18 As 52 19 wc 53 20 Au 54 21 6 55 Vcc 22 56 Vss 23 57 24 Azo 58 25 ss On 26 so Ds 27 ps 61 06 28 62 29 63 30 p 64 005 65 W LE 2 uh 32 Ds 66 IPL 33 0 67 As 34 0 68 Dia 1 3 AN SED Address Bus Ay 7 High Yes Yes Data Bus Do Dis High Yes Yes Add
34. Cru MCE OB KIM 9 AM RAM APFELAOTEANE OFF HACK TEEN RESENORERULON RAM R AM EL KEEN 1 i Dea Zit se sy RAM 1M DMA WORD RAM 2M DMA DWEtHETil7T5 72 DNEtBHET2T5 R W NR W LED PLE DA MT RAM 7 RAM RW WORD RAM R W i 1M 2M 1M WORD RAM 28077424277 0 0148 71 29 1 LSK KAALEN AAA CD PTOCRARL E277 CDC RAM DMA 1 PAU GATMMANALADTOLETONOF 72 NCA
35. Level 2 ERROR Error Level 3 300 308 Level 3 ERROR Ver 0 95 92 04 27 20 SEGA ENTERPRISES LTD 2 8 4 2 7 3 TM MEGA CD CHECKER 610 0276 PART No CD RAM BDIUREF Z3ERRLTNET MFF NEKET 0018 0800 0018 0100 0018 0104 0018 0108 0018 010C 0018 0110 0018 0114 0018 0118 0018 0116 0018 0120 0018 0124 0018 0128 0018 012 0018 0130 0018 0134 0018 0138 0018 013 0018 0140 error board error board al error board sf error boardlbv tood_bosrd tood board al board sf error_iot error_tot error tot error tot error total la error_torallls errer totel lb error total 12 error_total 2a error total 2s error_totnl_3s error_total_3b vector_errorct quick Check 0018 0200 0018 0202 0018 0204 0018 0206 0018 0210 0018 0212 0018 0214 0018 021C 0018 0220 0018 0222 0018 0224 0018 0222 0018 0230 0018 0232 0018 0234 0018 023C 0018 0240 0018 0242 0018 0244 0018 024C 0018 0250 0018 0252 0018 0254 0018 0256 0018 0260 0018 0262 0018 0264 0018 026C 0018 0270 0018 0272 0018 0274 0018 027C 0018 0280 0018 0282 0018 0284 0018 028C 0018 0290 0018 0292 0018 0294 0018 0240 0018 0248 0018 02
36. IAS o 2 tuos OT 0 58 IR W ee a H 7774 p OPROE H OPRWE 2 PENAN DMA ATCPU ER 745 DMA PCAA9 eB 4 7 d H NAH T DHT Coc 4o Ei Sb 2 4 GARY MAINS 2 4 155 chc f y MEE 5 5 T 12 LSE V eds IDEEN COC 4TH h i Gal widsene ANS COC f r 15 AMiE a bh T 9 WS TRE 17 795 IwALT CDC 4 7523 Hae GA Ar ARA thz Ad Cbc P 4 IDTEN AT 7 7 BA be edita OCK 25 25Hnz Bales CDD 5 97 94 RPO ILRCK 01 LrAg 2 Ronn ot d t 5 O C DC HTCPUIL 38 CPCAMTILA 3 9 af Bhang 455 CHRD 1DtEN Low IwAlT Ar HIGH 289 AS oUSEYL SEL Lowe Mads oHRD Low 30 BPRAP oz CDC 441 bo T y dar GA AT CPU OMS a IWAIT TY TUT IWAIT Ar HIGH a R Low t HATZ CHRDaLlewe c DC BPRAS 1 7 3 Mares TI A A AS 1 6 C K2 shRp TT 44 DRAM ARAL OPRFAS OFRCAS 4M DRAM 72 A aby f OPRRAS gt OPRCAS MAT MA SS 155 DPRCRS OPR RAS MA 7 vt 13 OPROE OPRUWE 4M DRAM CDC PC ABS Ad OPRLWE CPROE IK HARE 57 9 Lowe th OPRUWE IL HAG 7 9 amp BANG Lowe dy OPRLWE BP7 d 2 BPRASRZ 1 UM DRAM
37. A 03 04 START ee e DLORMBAAOSTIMWT MMSE VZ MW Yer 0 95 92 04 27 8 2 SEGA ENTERPRISES LTD Fryn Ri 2 Saz MEGA CD CHECKER PART No 610 0276 015 7 WORD RAM IM M5 8 WORD RAM IM DMA 3 2 4 0 5 9 WORD RAM IM DMA mM M5 10 WORD RAM IM DMAM 3 2 4 0 5 11 amp 5 1 2 Ver 0 95 92 04 27 9 SEGA ENTERPRISES LTD 820 Saz MEGA CD CHECKER PART 610 0276
38. MEGA CD MAIN BD 1 Y PCM FM CD TV CD FM TOK AMMSMEGA CD XH KS FM CD TV CD MEGA CDOMAIN BD LED 1
39. von wm oooooooooooooooo 256 256 16 TC51832P 1 MAIN BOARD IC10 11 1 1 IP VIEW Vun GND EED Ve S 7 Mn SOP28 sop28 P 450 18 5 0 2 11 84 0 3 3 d 3 1040 2 3 CERS 947 1 1 o upe B RAMEY NC TA CRED Vee Val F 77 tT OY RM GNDI IRE UTTO RI 1217 k MAIN BOARD internal syne controller 70 78 clock and timi generator ECC pacu n DACL H 12 bit data byte nlfsct Irbit CRE checker 1 1 1 4 Die MAIN BOARD IC13 2 2 7 15 0 5 MAIN BOARD MB8464A TOP VIEW FPT 28P M02 SOP 286 28 02 ICi4 15 1 1 Ane SOP WEY FPT 28P M02 40 251 010 1725 9 356 095 oa 1990 FUJITSU LIMITED 230115 4C 2 ove 256 32X8 55 Vo 1 04 s 2 201 110 mem Gd 10204030 1 402 012 0 001020 1031 1 0081 7 6 SUB BOARD LC7883M
40. 7 72 UA 1 s 5 z 2 7 NG 2727 7 lt gt j E A HH os NZ p 2 21 PARTS LIST FOR SEGA CD 1007 BOTTOM SHIELD amp FRONT COVER ASSEMBLY 002 610 5268 253 6438 601 6727 005 253 6439 01 305 250 5286 ASSY BOTTOM CASE MEGA CD BOTTOM CASE MEGA CD RUBBER FOOT MEGA CD FRONT COVER SEGA CD USA BOTTOM SHIELD MEGA CD IF 1007 BOTTOM SHIELD amp FRONT COVER ASSEMBLY PROCEDURE OF DISASSEMBLY AND ASSEMBLY OF MEGA CD FOR EUROPE 1 DISASSEMBLY PROCESS 1 Removing the screws from Bottom Case 1 Upset the unit 2 Remove 6 screws 201 for Bottom Case PROCESS 2 Removing the Top Case 1 Remove 2 screws 202 for Top Case 2 Remove the Top Case from Bottom Case PROCESS 3 Removing Assy Side Cover and Assy Side Knob 1 Remove the Assy Side Knob from Bottom Case 2 Remove 2 screws 203 from Assy Side Cover 3 Remove the Assy Side Cover from Main Board PROCESS 4 Removing Connect Board 1 Remove 4 screws 204 from Assy Side Cover 2 Remove the Side Cover Shield and Connect Board from Assy Side Cover PROCESS 5 Removing CD ROM Unit Shield 1 Remove 3 screws 201 for Bottom Case 2 Remove the CD ROM Unit Shield from Bottom Case PROCESS 6 Removing Main Board 1 Remove 3 screws 201 for Bottom Case 2 Remove the Main
41. Level1 2 ERROR L2ERR TOTAL1 THALELevel 2 ERROR L2ERR TOTAL2 Level 2 ERROR L2ERR TOTAL3 Level 2 ERROR L3ERR TOTAL L Level 3 ERRON L3ERR TOTAL1 Level 3 ERROR L3ERR TOTAL2 Level 3 ERROR L3ERR TOTAL3 Level 3 ERROR ERR TOTAL ERROR OMPEL ENDED POWER CNT DATA CHANGE VECTOR ERROR 68000 QUICK CHECK Frrr Error Level 1 100 186 Leve1 1 ERROR Error Level 2 200 213
42. UU ee BACK UP VOLTAGE ERROR OFF BATTERY VOLTAGE ERROR OFF VREFL 110 VREFH 111 VREF Lo VOLTAGE ERROR VREF Hi VOLTAGE ERROR 112 BACK UP VOLTAGE ERROR KARE 113 BATTERY VOLTAGE ERROR TIOS HE 114 AVcc VOLTAGE ERROR 115 OFFSET VOLTAGE ERROR 116 Vcc2 VOLTAGE ERROR 12M 117 CPU CLOCK ERROR 25M 118 25MHz CLOCK ERROR UNIT 119 CD UNIT CLOCK ERROR 120 PCM CLOCK ERROR 68000 121 68000 En CLOCK ERROR Ver 0 95 92 04 27 19 PART 610 0276 SEGA ENTERPRISES LTD Fi HH H2K MMS MEGA CD CHECKER PART 610 0276 9 3 7 1 V AxXimoieumshe4AT4 BAOXWEDLTURUETY HAMBRE CHECK TOTAL CHECK TOTAL1 CHECK TOTAL2 CHECK TOTAL3 ERROR BOARD ERROR BOARD1 ERROR BOARD2
43. CDC gt WORD RAM DMA ERROR DMA is not performed from the CDC 1 15 to the word RAM 1 IC12 DMA DIRECT MEMORY ACCESS Data transfer shall be done directly by the hardware function without going through the CPU The G A IC2 and the IC of the Mega Drive side have this function of the data transfer Fx 2K Saz MEGA CD CHECKER 1 PART No 610 0276 SEGA E E ho x BR 821 145 E C D 25 gt G O 2 7 C S H J H W mm 0 95 92 04 27 1 SEGA ENTERPRISES LTD 2 BAZ MEGA CD CHECKER PART 610 0276 1 EX 1 HX 2 2 RR _ 3 3j kr 3 ER 3 5 6 6 1 2 7 _ 14 8 17 9 18 10 23 Ver 0 95 92 04 27 2 SEGA ENTERPRISES LTD ECH 2 ARMA MEGA CD CHECKER PART No 610 0276 2 SS FLUE IN BAO dH XE 3 TOR FO flde O RETE 3 AM MEGA CD CD 4 KEDE 247
44. MAINTENANCE MANUAL E X P O E SEGA ENTER MEGA CD MAINTENANCE MANUAL EUROPE INDEX BLOCK DIAGRAM 172 ASSEMBLY DRAWING 2 GENERAL REFERENCE NUMBER LIST 4 ASSEMBLY LIST 5 1001 TOP CASE ASSEMBLY 6 1 1002 SIDE COVER amp SIDE KNOB ASSEMBLY 5 4 1003 SIDE COVER ASSEMBLY 2 1004 CD ROM UNIT SHIELD ASSEMBLY 12 05 1005 MAIN BOARD ASSEMBLY 14 15 1006 CD DRIVE UNIT amp SUB BOARD ASSEMBLY 16211 1007 BOTTOM SHIELD amp FRONT COVER ASSEMBLY 17 4 PROCEDURE OF DISASSEMBLY AND ASSEMBLY 22 21 SPARE PARTS LIST ga ACCESSORIES LIST _ 24 25 PCB REPAIR PROCEDURE 20 71 SOFT amp HARD CHECK MANUAL 28 E gd d 00 00 1 10 1a 10 1b 10 2a 10 2b 10 3a 10 3b 11 11 18 11 1 b 11 2 11 2b 11 2a 11 2b PARTS SPECIFICATION PCB DESIGN SPEC MAIN BOARD HD68HCO00CP 12 ays MAIN BOARD IC2 IC CUSTOM MCE2 MB634120 315 5548 gt MAIN BOARD 163 IC CUSTOM RF5C164A 315 4784 14 MAIN BOARD IC6 IC MB3790 5 MAIN BOARD IC7 8 IC TC511664BZ 80 Soh MAIN BOARD 1 10 11 TC51832FL 10 5 MAIN BOARD 1 13 IC LC8951 21752 MAIN BOARD 1 14 15 MB8464A 80 C SUB BOARD IC1 IC LC7883KM 51 SUB BOARD 1C2 LC7881M C 5 SUB BOARD 1 3 4 5 IC uPC844G2 PARTS LIST OF PCB IC BD MEGA CD MAIN BD EXPORT 91 92 BD MEGA CD SUB BD EXPORT 44 45 55 MEGA CD CONNECT
45. 126 126 126 126 126 126 126 126 121 127 128 128 128 128 128 128 129 129 130 130 910 910 910 910 131 132 131 133 NON 135 201 150 0404 090 0012 476 2332 J 10 476 2332 J 10 476 2332 J 10 476 2222 J 10 476 2222 J 10 476 2222 J 10 476 2222 J 10 476 2222 J 10 476 2222 J 10 476 2100 J 10 476 2100 J 10 476 2750 J 10 476 2750 J 10 150 0402 150 0402 150 0402 150 0402 150 0402 150 0402 150 0402 150 0402 150 0402 150 0402 150 0402 150 0402 150 0402 150 0402 151 0285 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0347 151 0347 151 0346 151 0346 151 0346 151 0346 151 0346 151 0346 151 0345 151 0345 151 0263 151 0263 NOT USED NOT USED NOT USED NOT USED 150 0401 150 0404 150 0059 601 0076 000 0308 DESCRIPTION RES RES RES RES RES RES RES RES RES RES RES RES RES CAP CAP CAP CAP NOT CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP E 10 10 10 10 10 10 10 10 10 10 10 10 10 UJ 52 C bj CJ Cj 02 t 3 t 3 t3 tJ t3 CER CER CER CER CER CER CER CER CER CER CER CER CER CER CER CER CER CER
46. CER CP CER cP CER CP CER CP CER CP CER CP CER CP CER CP CER CP CER CP CER CP CER CP CER CP CER CP CER CP CER CP CER CP CER CP CER CP CER CP CER CP 1 10W 1 10W 0 OHM 1 10W 2125 CER CP 1000PF 50V K B 0 1UF 0 1UF 1UF 1UF 1UF 1UF 1UF 1UF 1UF 1UF 1UF 1UF 1UF LUP 1UF 1UF 1UF LUF 1UF 100 50 100 50V 100PF 50V 100PF 50V 100PF 50V 100PF 50V 100PF 50V 25V 25V 25V 25V 25V 25V 25V 25V 25V 25V 25V 25V 25V 25V 25V 25V 25V 25V 25V EE ta ta E ZF ZF ZF ZF ZF ZF ZF ZF ZF ZF ZF ZF ZF ZF ZF ZF ZF ZF ZF CH CH CH CH CH CH 2125 2125 2125 2125 2125 2125 2125 2125 ER 214 2125 2125 2125 2125 2125 2125 2125 2125 2125 2125 2125 2125 2125 2125 2125 2125 2125 4 PARTS L15T PART NO DESCRIPTION LINE 111 00 112 00 113 00 114 00 115 00 116 00 117 00 118 00 119 00 120 00 121 00 122 00 123 00 124 00 125 00 126 00 27 00 28 00 129 00 130 00 131 00 132 00 133 00 134 00 135 00 136 00 137 00 138 00 139 00 140 00 141 00 142 00 143 00 144 00 145 00 746 00 247 00 148 00 149 00 150 00 151 00 152 00 153 00 LOCATE C28 29 c30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C41 C42 C42 C43 C43 44 C44 C45 C45 C46 C47 C47 C48 C48 C49 C49 C50 C50 C51 C52 C53 C54 C55 C56 657 5
47. IFL2 BIT ERROR PROTECT REGISTER R W ERROR HINT VECTOR ERROR COMMAND FLUG R W ERROR COMMAND PORT R W ERROR COMMUNICATION FLUG R W ERROR COMMUNICATION PORT R W ERROR RESO TIME CHECK ERROR LED BIT R W CHECK ERROR WRITE PROTECT CHECK ERROR WORDRAM 2M MAIN R W ERROR WORDRAM 2M SUB R W ERROR WORDRAM IM M gt S SWAP ERROR WORDRAM 1M S gt M SWAP ERROR WORDRAM 1M MAIN R W ERROR WORDRAM 1M SUB R W ERROR STOP WATCH CHECK ERROR TIMER CHECK ERROR COLOR OPERATION CHECK ERROR BACKUP ERROR BACKUP RAM R W ERROR PCM RAM CHECK ERROR EXTRNAL RAM CHECK ERROR EXTRNAL ROM CHECK ERROR 180 TO WORDRAM R W ERROR Ver 0 95 92 04 27 MEGA CD CIIECKER PART No 610 0276 Ver 0 9 1 13 SEGA ENTERPRISES LTD 2 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 050 AA A GATE ARRAY RESET CD DRIVE READ ERROR INSERT CHECK DISK CDC DATA SUB READ ERROR CDC DATA MAIN READ ERROR CDC gt PCM DMA ERROR CDC gt PRG RAM DMA ERROR CDC gt WORD 2M RAM DMA ERROR CDC gt WORD 1M RAM DMA ERROR DEVICE DISTNATION R W ERROR CDC DMA ADDRESS R W ERROR PM SUB 1M UPWRITE ERROR PM MAIN 1M UPWRITE ERROR PM SUB IM DOWNWRITE ERROR PM MAIN 1M DOWNWRITE ERROR STAMP SIZE REG R W ERROR STAMP M
48. 1 s B5 2 0 95 92 04 27 6 SEGA ENTERPRISES LTD 62 A SCH LER Ha RIERA M5 3 Wi TRO MIR RE Gn 3 00VELTTFEN A 5 2 CHECKER PART No 610 0276 FOES A C 5 4 OFF Dip switch2 S2 ON A CD CD Z 2 LD WY ERO ARO RT E EN TV CD MA IN BD 2 DIA YE 02005 RI 6 I5 X94 VOME BM
49. 132 132 132 133 133 133 133 133 133 gt gt otc 271 0005 1 NOT USED 271 0040 271 0040 NOT USED 212 5307 25 212 5324 25 212 5326 25 212 5335 25 212 5337 25 212 5306 21 212 5323 21 212 5325 21 212 5334 21 212 5336 21 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2222 J 10 476 2181 J 10 476 2361 J 10 NOT USED NOT USED NOT USED NOT USED 479 5005 0000 151 0326 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0265 151 0334 151 0334 151 0334 151 0334 151 0334 151 0334 151 0334 DESCRIPTION BEADS INDUCTOR FBA04VA600VB 00 NOT USED EMI FILTER FILMAC TII18103MA EMI FILTER FILMAC TH18103MA NOT USED JST 25FE ST FFC CFF1325 0101 HLEM 25R 1 FFC 00 8370 257 000 FFC IMSA 9603S 25F JST 21FE BT FFC CFF1121 0101 218 1 FFC 00 8370 211 000 IMSA 96038 21C 7KOIIM 1 10W 7KOHM 1 10W 1 10W 7KOHM 1 10W 2KOHM 1 10W CONN CONN CONN CONN CONN CONN CONN CONN CONN CONN RES RES RES RES RES RES RES NOT NOT NOT NOT RES CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CHIP 4 CHIP 4 CHIP 4 CHIP 4 CHIP 2 CHIP 160 OHM CHIP 360 OHM USED USED USED USED CHIP CER CP CER CP CER CP CER CP CER CP
50. 50 OLED R OLEDG OLATCH OSHFT OAT T e Sint LED 6 naan HOW WI 23 0 4 BE n d m 5 BUCK sa du calR Eee LRCK P p e DR 16 EM HEEL DATE OUT NPIL CLR AU wock LRCK DA dea Nenn caro cro Maw wara ARES 3a2 EE POL che CIO fq 3 POLIA 1298 PSSL eben 16 70 4 57 y Zi CD ROMSILIKQEE HERE 4 DDUS LLT RAPE MOR L3 Bette SEY TE C1 ON IBLE CD HOST HOST CD BS FIG 4 CD IRQ HSCK CD SC DDUS 1 CDCK LOW HSCK 5 HO ST SCKE FF CDMHSCKERET SET At Bae TORCDCKE
51. BD EXPORT 44 SCHEMATIC DIAGRAM BD MEGA CD MAIN BD ag 1 PC BD MEGA CD SUB BD 122 PC BD MEGA CD CONNECT BD 102 MOUNT DIAGRAM OL 105 BD MEGA CD MAIN BD COMP SIDE IC BD MEGA CD MAIN BD SOLD SIDE IC BD MEGA CD SUB BD COMP SIDE 107 IC BD MEGA CD SUB BD SOLD SIDE 10 IC BD MEGA CD CONNECT BD COMP SIDE 109 IC BD MEGA CD CONNECT BD SOLD SIDE BD MEGA CD MAIN BOARD COMP SIDE LAYER BD MEGA CD MAIN BOARD SOLD SIDE LAYER 19 PC BD MEGA CD SUB BOARD COMP SIDE LAYER PC BD MEGA CD SUB BOARD SOLD SIDE LAYER PC BD MEGA CD CONNECT BOARD COMP SIDE LAYER PC BD MEGA CD CONNECT BOARD SOLD SIDE LAYER MEGA CD EXPORT BLOCK DIAGRAM MEGA CD HARD MANUAL M Gell ml tos A icy VDP 52000 PRG RAH D BOOT ROH 16 z R 12 5412 Abit a 1 188 7 5 1H bit RAH SUB Fs les E 164 PU CIA yb Ay H D Sap 871 Mase 54 Icio BKxBbit 1HbitRAH cu BACKUP RAM WORD RAH 0 ter MEGA CD ENGINE Din 1HbitRAH TCR WORD RAH 1 RF5C164 PH SOUND 12 Tey LPF EN en lt Qe COC LC7881 BAKx8BDit MIX 00115 20937 er T e 0 L R LTNEOUT VER 0 5 1991 07 02 MEGA CD EXPORT ASSEMBLY DRAWING SEGA CD GENERAL REFERENCE NUMBER LIST 001 253 6437 TOP CASE MEGA CD 1 002 610 5268 ASSY BOTTOM CASE MEGA
52. BOARD IC2 1 1 CMOS LSI Wi 3 _ 7881M 16 DA 900670720 Wei CHIOUT Wein Geo 9 CHIOUT CH20UT BCLK 0 4 WCLK2 3 Vret H2 Vreth2 gt vpp 5 GND S wcLKz Wem DATA R suq iv DAC LRCK GND 4 Level Shift DATA DAC ren vpp STOUT Test Latch ven Circuit 16 TSTOUT wmm CHiOUT EPAF H OMS La BORE HANNE 4 ve 5V DF F20VD AMAF LLAMABAN 1 CL LAM WCLK2OT FU amp PG FA YOUR T4 43 9 LACK 1207233 CH1 CHERY 2 E LRCK H 9 CHI A 30360 1 LC7881M OR A shat RM uns 7 WCLK1 FOYI AMAF 1F H 69 WCLKIOD FU tU ACHI CH2 Yo UAM WCLK1 CH2 _ 5vrvemmastn cos 8 DATA H UAMOM MSB
53. Board Shield Top from Bottom Case 3 Remove FFC 21P from Main Board and then Cable of FFc 25P from Connector 4 Remove the Main Board from Bottom Case 5 Remove the Main Board Shield Bottom from Bottom Case PROCESS 7 Removing CD Drive Unit and Sub Board 1 Remove 4 screws 202 from Bottom Case 2 Remove 2 screws 201 from Bottom Case 3 Remove the CD Drive Unit from Bottom Case 4 Remove the Sub Board from Bottom Case 2 ASSEMBLY PROCESS 1 PROCESS 2 PROCESS 3 PROCESS 4 PROCESS 5 PROCESS 6 PROCESS 7 Setting of CD Drive Unit and Sub Board 1 Set Sub Board on the Bottom Case At this setting it is important to coincide each holes to the Bosses of Bottom Case Firmly Set Cable of FFC 21P to Connector of Sub board 2 Set CD Drive Unit on the Bottom Case 3 Fix 2 screws 201 4 Fix 4 screws 202 Setting of Main Board 1 Set Main Board Shield Bottom on the Bottom Case 2 Firmly Set two Cables of FFC 21P and FFC 25P to each Connector of Main Board at this setting it is inportant to coincide each holes to the Bosses of Bottom Case 3 Set Main Board Shield Top on the Main Board 4 Fix 3 screws 201 Setting of CD ROM Unit Shield 1 Set CD ROM Unit Shield on the CD Drive Unit at this setting it is inportant to coincide each holes to the Bosses of Bottom Case Setting of Connect Board 1 Set Connect Board and Side Cover Shield on the Side Cover 2 Fix 4 screws 204 Set
54. CD CD CD TV CD CD 6 10 0276 CDFzvA MMm 1610 0276 4 2 MEGA CD CPU SUBCPU MEGA CD 1 MCE MEGA CD CPU MAINCPU SUD CPU
55. CD 1 253 6438 BOTTOM CASE MEGA CD 1 601 6727 RUBBER FOOT MEGA CD 4 003 ASSY SIDE KNOB MEGA CD 1 253 6442 SIDE KNOB MEGA CD 1 253 6443 SIDE KNOB HOLDER MEGA CD 1 029 0060 TAP SCR PH 2 6 6 1 004 253 6441 02 SIDE COVER MEGA CD EXPORT 1 005 253 6439 01 FRONT COVER SEGA CD USA 1 101 837 8952 IC BD MEGA CD MAIN BD EXPORT 1 102 837 8953 1 BD MEGA CD SUB BD EXPORT 1 103 839 0534 ASSY MEGA CD CONNECT BD EXPORT 1 201 012 0310 TAP SCR PH 3 10 14 202 029 0089 TAP SCR PH 3 8 BLK 6 203 012 0410 TAP SCR PH 4 10 2 204 012 0312 TAP SCR PH 3 12 4 301 250 5289 SIDE COVER SHIELD 1 302 250 5280 CD ROM UNIT SHIELD 1 303 250 5287 MAIN BD SHIELD TOP 1 304 250 5288 MAIN BD SHIELD BOTTOM 1 305 250 5286 BOTTOM SHIELD MEGA CD 1 401 ASSY CD DRIVE UNIT JVC ELM 135 1 610 5270 10 CD DRIVE UNIT JVC ELM 135 1 253 6440 01 FRONT DOOR SEGA CD USA 1 501 610 5364 ASSY SIDE COVER MEGA CD EXPORT 1 1001 1002 1003 1004 1005 1006 1007 ASSEMBLY LIST FOR SEGA CD INDEX TOP CASE ASSEMBLY SIDE COVER amp SIDE KNOB ASSEMBLY SIDE COVER ASSEMBLY CD ROM UNIT SHIELD ASSEMBLY MAIN BOARD ASSEMBLY CD DRIVE UNIT amp SUB BOARD ASSEMBLY BOTTOM SHIELD amp FRONT COVER ASSEMBLY PARTS LIST FOR SEGA CD 1001 TOP CASE ASSEMBLY REF NO PART NO DESCRIPTION QTY 001 253 6437 TOP CASE MEGA CD 1 201 012 0310 TAP SCR PH 3 10 6 202 029 0089 TAP SCR PH 3 8 BLK 2 PARTS LIST FOR SEGA CD 1002 SIDE COVER amp SIDE KNOB ASSE
56. ES LC 776 ABS OPRAS OPCAS STMT a PF U 26k HATS GA DRAM 7 A p2 Z IL WE PELA oa TR HAS v TES 2 BPRAQ d Ad 98 Low r CDC bj oA A r 9 3 O PK RAS wd o eee Finn OPRCAS o_o Op y 8272 AC OPROE AA nee en PR VJWE a BDIt nn WT Lun DPA 2 3 crest wi mn f OPRCAS A en E SERENE Ku ss s CHRD Ns UE ac gt ume S aus Y 0HRD tebe BPRAY 7 Whe d 15 cC DD INFCK 1SCOR 15850 iLRCK ic2PO 1DXM TiRa IcbcK OCCA EDB3 OEXCK CDD CbE347 p S32 do CAI C FE dena ES CDD ADPCM 1 CD ROM 17 77 9 amp EA EE lg as Bk x LEZ ILRCK IDATA 2 AY Shah 7 7 akta Hicht 7 9 Low 2 AATZ rote 5 High a f t Mats Low 4 ILRCK 9 455 amp 0c2LR gt Gnad bag Y DENS MAG 22 0 Ah din CDD 925 7 243 1 hh t s iR ROSE a Aiii T 432 LB WAST 3 AE EZE s COD 7977243 BARS Uit 15 43 707 74 X alto e Ick
57. SIGNAL ERROR LEVEL 2 INTERRUPT 206 VPA SIGNAL ERROR LEVEL 2 INTERRUPT 207 IPL SIGNAL ERROR LEVEL 2 INTERRUPT 208 RES SIGNAL ERROR RESET 208 FC SIGNAL ERROR RESET 210 HALT SIGNAL RESET ERROR 211 SUBCPU RESET ERROR 212 SUBCPU RUN ERROR 213 HALT SIGNAL ERROR RUN 214 299 no used Level 1 ERROR CODE 100 no used 101 BOOTROM VERIFY ERROR 102 BACK UP RESET SIGNAL ERROR ON 103 BACK UP RESET SIGNAL ERROR OFF 104 BACK UP VOLTAGE ERROR ON 105 BATTERY VOLTAGE ERROR ON Ver 0 95 92 04 27 POWER ON ERROR amp ay SEGA ENTERPRISES LTD prvh i d wae 00 oo 106 107 108 109 110 m 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 138 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 BACK UP RAM R W ERROR BACK UP VOLTAGE ERROR OFF BATTERY VOLTAGE ERROR OFF BATTERY BACK UP ERROR VREF Lo VOLTAGE ERROR VREF Hi VOLTAGE ERROR BACK UP VOLTAGE ERROR BATTERY VOLTAGE ERROR AVcc VOLTAGE ERROR OFFSET VOLTAGE ERROR Vcc2 VOLTAGE ERROR CPU CLOCK ERROR 25MHz CLOCK ERROR CD UNIT CLOCK ERROR PCM CLOCK ERROR 68000 En CLOCK ERROR DMA 1M MODE 32 ERROR DMA 1M MODE 40 ERROR DMA 2M MODE 32 ERROR DMA 2M MODE 40 ERROR no used no used no used no used no used SUBCPU HALT ERROR SUBCPU RESET ERROR SUB PROGRAM RAM ERROR SUB PROGRAM RAM VERIFY ERROR
58. 0 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2331 J 10 476 2331 J 10 476 2331 J 10 476 2331 J 10 476 2331 J 10 476 2331 J 10 476 2162 J 10 476 2162 J 10 476 2162 J 10 476 2102 J 10 m gt DESCRIPTION PC BD MEGA CD SUB BD EXPORT HEAT SINK 17PB23L25 IC LC7883KM SOP IC LC7881M C SOP 1 UPC844G2 SOP IC UPC844G2 SOP IC UPC844G2 SOP IC UPC24051IF XSTR 25 1623 L5 XSTR 2501623 L5 XSTR 28C1623 L5 XSTR 258963 2 P COIL CHIP 100UH LEM4532T101K CHOKE COIL PLTO9H 2003R MURATA ae CHIP ss CHIP xs7 CHIP DIODE 1SR 35 100A RADIAL FUSE PICO II 25202 5 RADIAL EMI FILTER STX222MB EMI FILTER STX222MB EMI FILTER STX222MB EMI FILTER STX222MB EMI FILTER STX222MB BEADS INDUCTOR FBA04VA600VB 00 21FE BT CFF1121 0101 HLEM 218 1 00 8370 211 000 IMSA 96038 21C FOR DC NP UC 0056 1 HSJO874 01 440 CONN JST CONN FFC CONN FFC CONN FFC CONN FFC PIN PLUG STEREO MINIJACK PHONO PIN JACK 2P RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES RES CHIP 4 CHIP 4 CHIP 4 CHIP 4 CHIP 4 CHIP 4 CHIP 4 CHIP 4 CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP geo A AA TKOHM TKOHM TKOHM 7KOHM 7KOIIM TKO
59. 0 A 0 027 A 9 VAN 0 250 1 200 A 0 608 A 106 572 007 0 250 1 200 0 618 5 VALE 5 00 V 100 571 083 4 88 5 08 V x 12M 12498 12502kHz 12500kllz 62 446 12499 12500kllz 12500kllz T 25M 1 2 M 2 24999kllz 62 369 24992 25000kllz x UNIT 16933 16937kHz 16935kllz 62 162 16935 16935kllz 16935kllz x PCM 6248 6252kHZ 6250kllz 62 055 6250 6250kIIZ 6250kllz 68000 1248 1252kHz 1250kllz 61 698 1250 1252kllz 1250kllz EI 977 ID BE IO GNU E do 2 iE2 Ver 0 4 MAX M1 NO ES 3 Ver 0 95 92 04 27 18 9 5 ROM SEGA ENTERPRISES LTD 2 9 2 REAMEES 9 1 lt MM MEGA CD CHECKER 5 V it 304 5V CURRENT ERROR 9 V Mitt 305 9V CURRENT ERROR 5 VALE 306 104 5V VOLTAGE ERROR BACK UP VOLTAGE ERROR ON BATTERY VOLTAGE ERROR ON er FE RL ALE 105 107 RERE 108
60. 0 SOP 28 MB8464A 90 SOP 28 8464 80 SOP 28 IC MB8464A 90 SOP 28P IC MB846410LL PF G BND 74 74 SOP 74VHC74 SOP XSTR 2501623 L5 7 CHIP XSTR 2SC1623 L5 7 CHIP BATTERY AL2032 IIC1 BATTERY ML2016 HS1 LED GL5PR44 RED LED GL5KG44 GREEN XTAL OSC 50MHZ LINE FILTER RING LINE FILTER RING LINE FILTER RING NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED LINE FILTER LINE FILTER LINE FILTER LINE FILTER LINE FILTER TYPE TYPE TYPE RING RING RING RING RING TYPE TYPE TYPE TYPE TYPE 3T 91 57 58 59 60 61 62 63 64 65 66 67 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PAKI5 Lisl PART NO DESCRIPTION LOCATE FB17 FB18 EM1 EM2 EM3 CN1 CN1 CHL CNL CN3 CN3 CN3 CN3 CN3 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 cl c2 c3 C4 C5 c9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 24 c25 C26 C27 837 8952 1 BD MEGA CD MAIN BD EXPORT DNO OR PART NO 122 910 123 123 910 124 124 124 124 124 125 125 125 125 125 126 126 126 126 127 128 129 910 910 910 910 130 131 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132 132
61. 16V UWX1C100MCR 10UF16V MV16VC10 3 5 10UF16V UWX1C100MCR 10UF16V MV16VC10 3 5 10UF16V UWX1C100MCR 10UF16V MV16VC10 3 5 10UF16V UWX1C100MCR 10UF16V MV16VC10 3 5 10UF16V UWX1C1LOOMCR 10UF16V MV16VC10 3 5 10UF16V UWX1C100MCR 10UF16V MV16VC10 3 5 10UF16V UWX1C100MCR 10UF16V MV16VC10 3 5 10UF16V UWX1C100MCR 10UF16V MV16VC10 3 5 10UF16V UWX1C100MCR 10UF16V MV16VC10 3 5 10UF16V UWX1C100MCR OUF 6 3V RADIAL 100UF 6 3V RADIAL USED USED CER USED USED USED DL D CP 100PF 50V J CH 212 IP SKTS 40P M SCR PH M3 8 43 0 30 0 25 PART NO DESCRIPTION 00 00 00 00 00 LOCATE PCB HEAT SINK IC IC2 1C3 IC4 IC5 R29 2 101 102 103 103 103 104 105 105 105 106 107 108 109 110 111 111 111 111 111 112 113 113 113 113 113 114 115 116 117 117 117 117 LIT 117 117 117 117 117 117 117 117 117 117 117 117 117 117 118 118 118 118 118 118 119 119 119 120 837 8953 BD MEGA CD SUB BD EXPORT DNO OR PART NO 171 6327A 530 5047 313 5184 313 5183 313 5185 313 5185 313 5185 313 5193 482 5126 482 5126 482 5126 482 5146 01 180 5073 180 5093 481 5038 01 514 5044 271 0007 271 0007 271 0007 271 0007 271 0007 271 0005 1 212 5306 21 212 5323 21 212 5325 21 212 5334 21 212 5336 21 212 5004 210 5096 210 5097 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 10 476 2472 J 1
62. 2 error bit sarisus 0018 0358 IM 32 error bit average 0018 0364 IM 32 error bit average count 0018 0368 dmsls40er 14 40 error bit winisus 0018 036 IM 40 error bit 0018 0370 IN 40 error bit averate 0018 037 IN 40 error bit averate count 0018 0380 ZU 32 error bit sinisus 0018 0384 24 32 error bit maximum 0018 0388 24 32 error bit averate 0018 0394 ZU 32 error bit averate count 0018 0398 ZU 40 error bit sinisus 0018 039 MA 2M 40 error bit warisuw 0018 0340 WA ZU 40 error bit average 0018 03AC 24 40 error bit average count 0018 0310 ood vrefl minisun voltate 0018 0382 tvrer ia ood vrefl voltate 0018 0384 evreflZave ood vrefl averate 0018 0380 tvref ood vrefl averate count 0018 03c0 ood vrefh winiaus voltate 0018 032 ood vrefh marinus voltate 0018 OJCA tvrefh ave ood vrefh averate 0018 03CC evrefh_ent vrefh average count 0018 0300 back upon up power on winisus voltate 0018 0302 on mi Se voltage 0018 0304 on 0018 039 0018 030 0018 0322 0018 0364 0018 0018 03F0 0018 03 2 0018 034 0018 0018 0400 0018 0402 0018 0404 0018 040 0018 0410 offset 0018 0412 ood offset 0018 0414 0018 0018 0420 0018 0422 0018 0424 0018 0420 tc vce cnt te count 0018 0430 battery ood battery 0018 0432 tbattery ood b
63. 3 1014 837 8952 2 IC BD MEGA CD MAIN BD EXPORT DNO OR PART NO 1 171 6326A 2 250 5258 3 253 6444 3 253 6444 101 1 315 0637 101 2 315 0650 101 3 315 0626 102 315 5548 103 315 5476A 104 1 EPR 15045 104 2 MPR 15045 105 315 0739 10 106 313 5190 107 1 315 0627 80 107 2 315 0627 80 01 107 1 315 0627 80 107 2 315 0627 80 01 108 314 0521 109 1 315 0677 109 2 315 0547 10 109 1 315 0677 109 2 315 0547 10 110 1 314 0549 110 2 314 0549 01 110 3 314 0549 02 111 313 5181 112 1 315 0651 112 2 315 0651 90 112 1 315 0651 112 2 315 0651 90 113 315 0635 114 1 314 0540 114 2 314 0548 115 482 5126 115 482 5126 116 1 401 0036 116 2 401 0037 117 390 5366 118 390 5367 119 230 5081 120 270 5029 120 270 5029 120 270 5029 910 NOT USED 910 NOT USED 910 NOT USED 910 NOT USED 910 NOT USED 910 NOT USED 910 NOT USED 910 NOT USED 120 270 5029 120 270 5029 120 270 5029 121 270 5054 120 270 5029 DESCRIPTION PC BD MEGA CD MAIN BD EXPOR LED BRACKET MEGA CD LED COVER MEGA CD LED COVER MEGA CD MC68HCOOOFN12 PLCC HD68HCOOOCP 12 PLCC TMP68HC000T 12 PLCC CUSTOM CHIP MCE2 CUSTOM CHIP RF5C164A SEGA CD BOOT ROM SEGA CD BOOT ROM UPD424270 10 SOJ MB3790 SOP 16PIN 511664 2 80 ZIP TC5116642 80 ZIP TC511664BZ 80 ZIP TC5116642 80 ZIP 7410245 SOP TC51832FL 10 SOP HM65256BLFP 10 SOP TC51832FL 10 SOP HM65256BLFP 10 SOP IC MB74HC86 SOP 86 SOP HD74HC86 SOP Ic LC8951 QFP 8464 8
64. 8 IC4 LED 837 8952 IC BD MEGA CD MAIN BD EXPORT DNO OR PART NO 133 134 133 133 133 135 135 136 137 138 139 140 140 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 141 142 142 910 910 133 910 910 910 143 201 NE tO NENENENENENENENE 151 0334 151 0308 151 0334 151 0334 151 0334 151 0318 151 0318 151 0328 151 0329 151 0359 151 0351 151 0360 151 0360 150 0400 150 0400 01 150 0400 150 0400 01 150 0400 150 0400 01 150 0400 150 0400 01 150 0400 150 0400 01 150 0400 150 0400 01 150 0400 150 0400 01 150 0400 150 0400 01 150 0400 150 0400 01 150 0400 150 0400 01 150 0401 150 0401 NOT USED NOT USED 151 0334 NOT USED NOT USED NOT USED 213 0071 40 000 0306 DESCRIPTION p CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP CAP NOT NOT CAP NOT NOT NOT AMP CER CER CER CER CER CER CER CER CER CER CER CER CER CP CP CP 10 00050005 Cj 09 CJ C3 59 tJ t CJ t3 CJ t3 100PF 50V J 212 18PF 50V CH212 CP 100PF 50V J CH 212 CP 100PF 50V J CH 212 CP 100 50V 7 CH 212 CHIP 33PF 50V CII212 CHIP 33PF 50V CH212 CHIP 22PF 50V CH 212 CHIP 220PF 50V CH 212 CP 330PF 50V CH 2125 CP 120PF 50V CH 2125 CHIP 150PF 50V CH212 CHIP 150PF 50V CII212 10UF16V MV16VC10 3 5 10UF
65. A8 U4 RBS 220 4 TNT CON CD CONNECT BD ASSY MEGA 0436 839 SEGA ENTERPRISES LTD PC BD MEGA CD CONNECT Document Number 171 6132C December Date 163 SUBASSY mus SU ALTERATIONS MACHINE SAL E91 964 3135L 1 12 51 664 8 60 TC 61166488 82 8 1 11 iOS o o 34 REMARK Hf 3 THIS DRAWING WILL IN MO WAY BE COPIED TO BE RETURNED ON DEMAND RD PROJ DRAWING 5 SCALE Rit FINISH Ic Bb Bb 5 DESCRIPTION SEGA ENTERPRISES LTD un 2 lt lt LIMITS UNLESS OTHERWISE SPECIFIED 412 Comp Side ae 2 1 Ip 9 sense ez Fo 952821300 IN 2055 SIE 420002 8 pem V93S Er on n 197834 33011 Ed esch lt EEN 11 1 i RS toe HN MT cs 129 c35 loop Ei I 1 i i 3 4 le y Sold Side SEGA seca ENTERPRISES mt DCH LIMITS UNLESS OTHERWISE SPECIFIED 12 SCALEA le k MATERIAL Up HEAT TREAT fm FINISH Bb MEGA CD Bb 37 2015 e 38 i DESCRIPTI
66. AA 0018 02AC 0018 0238 001 0260 0018 0202 0018 0204 0018 0200 0018 0208 0018 020C 0018 0220 0018 02EC 0018 0270 0018 0274 0018 0278 0018 0304 0018 0308 0018 030 0018 0310 ck urof f ave back upoff ent charie charte cdvcc ent battery current5Y current5Y current9V current9V Ver 0 95 92 04 27 of 100181 of itotal of total of total of total of total of of of or of of of total of totel of total of itotal of itotal of total of total of of of a save adr hecked nu 11 checked number oft checked number up verify checked number rror board number rror board of all checkd number error bonrd of soft checked number error board of bupres verify checked number tood board number ood board of all checked nusber good hoard of soft checked number tood board of bup verify checked nunber Found error nusbe found error of all checked number found error of soft checked number found error of ra verify checked nuaber found error level nunber found error level of all checked number found error level of soft checked nuaber found error level of bup veirfy checked found error level 2 nuaber found error level 2 of all checked nusber found error level 2 of soft checked found error level 2 of bup ras veirfy checked f
67. AP REG R W ERROR IMAGE VCELL REG R W ERROR IMAGE START REG R W ERROR IMAGE OFFSET REG R W ERROR IMAGE REG R W ERROR IMAGE VDOT REG R W ERROR TRACE VECTOR REG R W ERROR PM 2M UPWRITE ERROR PM 2M DOWNWRITE ERROR VRAM IMAGE ERROR CDC REGISTER R W ERROR 187 199 no used MEGA CD CHECKER PART No 610 0276 ML Ver 0 90 INSERT CHECK DISK please EXMLIS ELRN Ver 0 9 3 Ver 0 7 1 1 91 CD MAEDA I 015 2 A za 015 3 CD MAIN BD
68. AS2 HF EHE x HM 1ASE 4MD XA M7 TE ACE 43 gt 85 _ 52 2 1 5 2 TAS MULA ds ha IFDC Sa 19 7 er Teer 3 45 IFRES SAE 09 T2951 X32 WEES VAN CPU 7 X b ES YA 7 5 HR AMA LES CXBRoM ek SARL d O FEFF y E mache 1 212 BIE N P Ui 29 ag db d Xd Vbit f IL CPU 47200 tE A e 66 As ASE o 1XAS IXUDS 1XLDS IRXw IFC lt LANAI BDD OCLK OMALT ORESET 0 DTACK OIPLI g ATCPUIAL 1 7 44 ROBADA Ake h h 17CPU 9 GA HL TIE BDI 328 12 AES bur 62 F IER 57 0 dv Akhvbzh LAL h 143 HT BROT gA 22 MOL UW 38 Low AATHB NUT INTACK alt AG ant HLH CPU 0 MANES RABY POM bma ki 02 BAIR Y a 97 PU 5 7 9 He KATES HUQ HAE Clock WAS 2 5 W CPU KELT HALT DY SER GA b wats RESET E BUSY GA e dades RESET Ars hae 4 2 1 e Ty le BALDE TEE NENG she 24 ha ATE PU 42927 EE R12 da EE arm BA te Men d Loon m 4 4 2 ARES ZORO E EVEN Bl D RAM OEFAL LECAS
69. ASED OR REWRITTEN Make sure that the power is turned off beforehand and then install a Mega Drive on the MEGA CD to be checked Connect the Joypad to the Control No 1 of the Mega Drive Install the check cartridge on the cartridge connector of the Mega Drive Turn the switch of the Mega Drive on Checking starts when the START button of the Joypad is pressed The tray opens during the checking Install the check CD If the checking is completed the tray opens again Remove the check CD CAUSE OF ERROR IN EACH CHECK ITEM MEGA CD INTERFACE PART 1 Boot ROM Read check Read the boot ROM IC4 in the MEGA CD from the Mega Drive and check if it is in the normal conditions Cause of Error Connector board Connector pin contamination Ic defect pattern disconnection etc Boot ROM defect 1 4 etc If the boot ROM is EPR 14088A Version A it always results in error The software itself of this boot ROM has many bugs therefore replace it with the latest ROM Program RAM R W check Perform R W onto the program RAM IC5 to IC8 and check if the access to the RAM is normal Cause of Error Defect of IC5 to Ic8 pattern disconnection surroundings of GA IC2 etc 4 BIOS transfer 4 System transfer Transfer the data of the BIOS collection of programs for each of the functions to have sub CPU access to the CD drive and the data of the system program that has used the BIOS from the check cartridg
70. BOET CDCK LOW HSCK HI B 3mSEC CD lt PIN 2np 1 0 Evid 1 F16 5 lt B 1 2V 3 1 1 15 IRQ DW HSCK CDCK Rig DBUS 0 CD 77 IRQ oy HOST DATA LRCK SCOR SBSO 5 EAM A EAM IE p 292 7 13 3 msec 4 Fig 4 6 TREE ZEN DFJI2 2 16 315 5476 gt RESETR RAMWEB RAMAN RAMA LRCLK RAMA6 RAMAS DACIL RAMM DACI DATA XIN BCLK DACA GND DACS RAMA DAC RAMA DAC7 RAMAI SUR RAMAN Si cs Alt DI All D AI0 DI 0 UU U NN D
71. CER CER CER USED 3 UF UF UF UF UF UF UF UF UF UF UF UF UF 10UF CP cr USED USED USED 3 3 2 2 2 2 2 2 3KOIIM 3KOHM 2KOHM 2 2KOIIM 2KOIIM ZKOHM ZKOHM 10 OHM 10 75 OHM 75 ONM 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 16 RADIAL F 16V RA DIAL F 16V RADIAL F DIAL FAI_4 16V RA 16V RADIAL F 16V RA DIAL F 16V RADIAL F 16V RADIAL F 16V RADIAL 16V RADIAL F 16V RADIAL 16V RA DIAL F 16V RADIAL F 16V RADIAL FAI_4 1U 1U 1U 1U 10 680PF 680PF 8200PF 8200PF 8200PF 8200PF 8200PF 8200PF 25V 1UF 25V F 25V F 25V F 25V F 25V F 25V lUF 25V F 25V 50V K 50V 50V 50V 50V 50V 50V 50V 1200PF 50V 1200P 2200PF 50V K F 50V 5 5 5 5 5 5 5 5 5 5 5 5 5 A1_4 AI 4 AI_4 AI 4 AI A AI A FAI 4 4 FAI_4 Al A AILA ZF 2128 ZF 212 ZF 212 ZF 212 ZF 2125 ZF 212 ZF 2125 ZF 212 ZF 212 212 212 2125 2128 2125 2125 2125 2125 KB2125 212 212 DUDO 2200PF 50V K B 212 1000 6 3V RADIAL 100UF 6 CAP E 100UF 6 3V U TYPE 105 C_ 3V U TYPE 105 C CAP E 100UF 16V U TYPE 20 M SCR PH PHILL ISO M3 8 45 PART NO DESCRI
72. D MEGA CD EXPORT PCB DESING SPEC 7 222 E lU 2 PC BD MEGA CD S PC MEGA CD CONNECT BD Comp Side 14 a i A E DISS ULLAM MN IM 2Eev 148485 141 0135C BD MEGA CD CONNECT BD Sold Side I5 315 5549 MAIN BOARD 1 2 343 67 ve a cs 4 CONTROL 5 ALARM vege ci iooopF ALARME Es RESI GNO RESET i M83790 16 d BGACK ee ne t 2399 Be 217 NOT USED C NOT USED 1 SACH 4 7K 100pF NOT USED 8 gt 837 8015 01 BD MEGA CD MAIN BD lt 19 151 gt SEGA ENTERPRISES LTD CPCTG 33 gt van gt BD MEGA CD MAIN BD Fes css PA o 8 gt 55 NOT USED 10uF vece cse 0 022uF P 8 c23 pto 45 4 10 H 5 6 ugiaelzk zlalalo E 5 BMM 5 II 8 888888888888 555555555555555555 he 015 315 5548 ZS RZW UDS DS DTAK PLO VPA Fco FC4 RESET 12M VVVVVVVVV AAAAAAAAA 123456788
73. HM TKOHM TKOHM TKOHM TKOHM TKOHM TKOHM TKOHM TKOHM TKOIIM TKOIIM TKOIIM TKOHM TKOHM 330 OHM 330 OHM 330 OHM 330 330 OHM 330 OIM 1 6 1 6KOHM 1 6KOHM 1KOlM 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 1 10W 5 44 LINE 60 61 62 63 64 65 66 67 100 101 102 103 104 105 106 107 00 C36 108 109 110 00 C39 112 113 111 114 116 117 118 00 HS 00 GRS 106 PARTS LIST PART NO DESCRIPTION LOCATE 00 R30 00 R31 00 R32 00 R33 00 R34 00 R35 00 R36 00 R37 00 R38 00 R39 00 R40 00 R41 00 R42 00 Cl 00 C2 00 C3 00 C4 00 C5 00 C6 00 C7 00 C8 00 C9 00 C10 00 C11 00 C12 00 C13 00 C14 00 C15 00 C16 00 C17 00 C18 00 C19 00 C20 00 C21 00 C22 00 C23 00 C24 00 C25 00 C26 00 C27 00 C28 00 C29 00 C30 00 C31 00 C32 00 C33 00 C34 00 C35 00 C37 00 C38 00 _C40 00 C41 00 C42 115 00 C43 00 MS HS 837 8953 IC BD MEGA CD SUB BD EXPORT DNO OR PART NO 121 121 121 122 122 122 122 122 122 123 123 124 124 125 125 125 125 125 125 125 125 125 125 125 125 125 125 126
74. LON 0108 81 2510 30 108S N340 mist 108 wegl ON aseo 1 ON XI V lt sI Z aod MEGA CD USA SOFT amp z HARD CHECK MANUAL MEGA C D SOFT CHECK eee MEGA SOFT CHECK Row CHECK CARTRIDGE gt START I MEGA CD INTERFACE PART 1 BOOT ROM READ CHECK 2 PROGRAM RAM R W CHECK 3 BIOS TRANSFER SYSTEM TRANSFER 4 SUB CPU RESET CHECK CHECK Se gt 1 COMMUNICATION FLAG R W CHECK 2 COMMUNICASION PORT 3 STOPWATCH CHECK 4 WORD PART 1 1 2M MODE CHECK 2 2M MODE SELECT CHECK 3 GRAPHIC MODE CHECK 4 GRAPHIC OVERWRITE MODE CHECK 5 GRAPHIC UNDERWRITE MODE CHECK 6 1M MODE R W CHECK 7 1M MODE SWAP CHECK B IM MODE OVERWRITE MODE CHECK 9 IM MODE UNDERWRITE MODE CHECK 10 VRAM IMAGE CHECK 11 WORD RAM TO VRAM DMA CHECK 4 PERIPHERAL IC 1 1 PCM WAVE MEMORY R W CHECK 2 BACKUP RAM CHECK INTERFACE PART 1 1 CD DRIVE CONNECTION CHECK COMMUNICATION 2 TOC READ CHECK 1 CD DATA READ CHECK 1 SUB CPU READ CHECK 2 MAIN CPU READ CHECK 3 PROGRAM RAM DMA CHECK 4 PCM RAM DMA CHECK 5 WORD RAM 1M MODE DMA CHECK 6 WORD RAM 2M MODE DMA CHECK y SOUND CHECK 1 CD DA CHECK 1 1 y END N 30 MEGA CD SOFT CHECK MANUAL T HOW TO USE CHECK CARTRIDGE AND CHECK CD dee 6 7 CARE HAS BE TAKEN THAT IF THIS CHECK IS PERFORMED THE DATA OF THE BACKUP RAM ARE ER
75. MBLY 203 501 253 6442 253 6443 029 0060 012 0410 610 5364 ASSY SIDE KNOB MEGA CD SIDE KNOB MEGA CD SIDE KNOB HOLDER MEGA CD TAP SCR PH 2 6 6 TAP SCR PH 4 10 ASSY SIDE COVER MEGA CD EXPORT PARTS LIST FOR SEGA CD 003 SIDE COVER ASSEMBLY REF NO PART NO 204 253 6441 02 SIDE COVER MEGA CD EXPORT 103 839 0534 ASSY MEGA CD CONNECT BD EXPORT 204 012 0312 TAP SCR PH 3 12 301 250 5289 SIDE COVER SHIELD gt ARTS LIST FOR SEGA CD 1004 CD ROM UNIT SHIELD ASSEMBLY REF NO PART NO DESCRIPTION 201 012 0310 TAP SCR PH 3x10 3 302 250 5280 CD ROM UNIT SHIELD 1 1004 CD ROM UNIT SHIELD ASSEMBLY PARTS LIST FOR SEGA CD 1005 MAIN BOARD ASSEMBLY 101 837 8952 201 012 0310 303 250 5287 304 250 5288 IC BD MEGA CD MAIN BD EXPORT TAP SCR PH 3 10 MAIN BD SHIELD TOP MAIN BD SHIELD BOTTOM BOARD ASSEMBLY 1005 MAIN PARTS LIST FOR SEGA CD 1006 CD DRIVE UNIT amp SUB BOARD ASSEMBLY 102 837 8953 BD MEGA CD SUB BD EXPORT 201 012 0310 TAP SCR PH 3 10 202 029 0089 TAP SCR PH 3 8 BLK 401 ASSY CD DRIVE UNIT JVC ELM 135 610 5270 10 CD DRIVE UNIT JVC ELM 135 253 6440 01 FRONT DOOR SEGA CD USA 1006 CD DRIVE UNIT amp SUB BOARD ASSEMBLY 201 N X KAN Y N WA AS WA Y rt e w x Vi
76. ON 2 PART ME bs D E F G H 106 en E A 5 wes SUBASSY sa ze 26 e ALTERATIONS m 2 7 Erreg CNAR om por SECH eR 35 TRA C15 BaT 8046 01 IC BD MEGA CD BU 91964 3135L GE BE ATEZ d 12 14 Comp Side THIS DRAWING WILL IN MO WAY BE COPIED SEGA BEGA ENTERPRISES LTD LIMITS UNLESS OTHERWISE SPECIFIED 3FD OUAT PROJ DRAWING Bit SCALE dm nee mm HE HEAT TREAT PE FINISH REMARK REV MATERIAL DESCRIPTION Eh ter RR F G H ren o 2 amp el ALTERATIONS 9 9 274 mos Sold Side THIS DRAWING WILL IN MO WAY BE COPIED SEGA ENTERPRISES LTD TO BE RETURNED ON DEMAND LIMITS UNLESS OTHERWISE SPECIFIED SCALE 2 DIM IN A A kh Sal W HEAT TREAT MA FINISH REMARK 390117 REV IC BD MEGA CD 508 37 8044 0 935 DESCRIPTION amp PART NO B 185 E E G H 108 e ANA HEN A an ES EEN A D Zen
77. PTION 839 0534 ASSY MEGA CD CONNECT BD EXPORT DNO OR Q U SB PART NO DESCRIPTION 1 1 000 171 6328A PC BD MEGA CD CONN BD EXPORT 101 2 000 _ 212 5310 ___ ___ EDGE CONNECTOR 60P MITSUMI 102 1 1 000 270 5030 EMI CORE ESD FPD 50 102 2 1 0 5030 0 1_ 28 OHM KCL80HA 103 2 477 0005 R PACK 8 4 7KOHM 1 89 W COMMON 104 4 000 _ ___477 0133 _______R PACK CHIP 4 220 0HM 1 16W 5 105 5 000 477 0141 R PACK CHIP 4 33 OHM 1 18W 5 106 _18 000____15 1 0360 _________ _ _ __ 150PF 50V CH2125 201 4 000 048 0005 EYLET 3 5 7 910 2 000 NOT USED _______ USED 96 MEGA CD EUROPE SCHEMATIC DIAGRAM q1 MEGA CD EUROPE MOUNT DIAGRAM 104 5 610 8269 0 ALTERATIONS 91964 3135 WA2 Ay AER n Ds 3 o 20 m mm 3 SEGA 92720120 DIEI comeet Hier H A30 Comp Side Sold Side SEGA ENTERPRISES LTD THIS DRAWING WILL IN WAY BE COPIED E TO BE RETURNED ON DEMAND LIMITS UNLESS OTHERWISE SPECIFIED m sur D i ara MATERIAL HEAT TREAT FINISH UE REMARK REV ASSY MEGA CD CONNECT BD 39 2436 PART ERES 5
78. a 101 ITLL 77478 CERAS ANA 15 455 CECAS POERAS ol oh 17 Layat KF CEOE OEWE EVEN Rat LT ib 5428 Bi DRAM 2 1 64 oEGE E WA 34h BS oEWEt h gt BEAD I g 1 3414 PILAM GERS I Ts PELI 075 Bf t TE 9 WEE OMA BEADIAS H F J Oo VS 15 EVEN R DRAM P2tA BEDIS 3 1 To AEUMNALKS 1 bu OERAS OECAS su ML MM A E NEN oEoE SS ee OEWE AO T EVEN 215313 X aK HL EVEN z ODDa Hn CPUE 2Mr E oll gt CPU ODDANIE 2 Pii MAES ER ODD E D RAM 10 TT Cru PCM COC opcM CDC 4 0 1 LT gta y4 EO Zo Terroooo Lire Breet 1 AS bee E LK LI wets Ue ied ee as BE eee ee EE J 0OCDC OPROE ii 9 oPRUW ao a E rF V PCA CDC EO au E CPU MRAM CDC An 722 X PELA EES X lAR IAIb H ac Ho
79. attery 0010 0434 tbattery ave ood battery 0018 043C tbat tery ent ood battery count 0010 0440 tcurrentbV 004 5v current 0018 0442 tcurrent5V uaz tood 15v current 0018 0444 teurrent5V ave tood 5 0018 0450 tcurrentbY ent tood 15v count 0010 0458 tcurrent9V ain tood 19v current 0018 0454 teurrent9y tood current 0018 045C tcurrent V ave tood 9v 0018 0468 tcur tood count 0018 0470 tvoltate ein tood 5 voltage 001 tood 45 voltag 00 tood 15 00 tood 5 tood 12MNz tood 12082 0018 0490 itood 12MNz itood 12UNz tood 25MNz minimum clock itood 25MNz marinus clock 0018 0448 itood 25MNz 0018 0484 itood 25011 average count 0018 0 tood DFCL CD unit 0018 048C tood Co unlt 0018 04cO tood DFCI Cb unli 0018 tood DFCE CD unit 0018 0400 tood PBCLK PCM win 0018 0404 tood PECLE PCM s 0018 0408 tood PBCLE FCH 0018 04E4 tood PRCLL PCU aj 0018 0428 tood 68000 tn 0018 04EC tood 68000 En 0018 0470 tood 60000 En 0018 our tood 60000 En 0018 0680 75220 0018 0600 tota number in day 0018 0604 total of error board number in a day 0018 0608 total of good board number in a day 0018 060C total of Level Error number in a day 0018 0610 total of Level 2 Error number in a day 0018 0614 total of Level 3 Error number in day Ver 0 95 92 04 27 422 SEGA ENTERPRISES LTD
80. b side is not performed normally in the word RAM 1M mega mode WORD DRAM 1M MODE SWAP ERROR Switching of the RAM is not performed normally in the word RAM 1M mega mode WORD DRAM 1M MODE OVERWRITE ERROR The overwrite mode does not operate normally in the word RAM 1M mega mode WORD DRAM 1M MODE UNDERWRITE ERROR The underwrite mode does not operate normally in the word RAM 1M mega mode VRAM IMAGE ERROR The VRAM image of the word RAM does not operate normally 36 26 27 28 29 30 31 34 35 36 WORD DRAM TO VRAM DMA ERROR DMA from the word RAM to the VRAM is not performed normally PERIPHERAL IC PCM RAM R W ERROR The R W of the PCM RAM IC13 IC14 cannot be done BACKUP RAM R W ERROR The backup data is destroyed 10 check The first time results in error BACKUP RAM R W ERROR The R W of the backup RAM IC10 is not done normally CD INTERFACE PART CD DRIVE NOT READY Critical error occurred at CD DRIVE SUB CODE READ ERROR The CD drive cannot read SUB CODE CD data CD DATA READ CHECK CDC SUB CPU READ ERROR CD DATA cannot be read from SUB CPU 1 1 CDC MAIN READ ERROR CD DATA cannot be read from the main side mega drive side CDC gt PROGRAM RAM DMA ERROR DMA is not performed normally from CDC IC15 to the program RAM IC15 to 8 CDC gt PCM RAM DMA ERROR DMA is not performed normally from CDC IC15 to the PCM RAM IC14 15
81. e to the program RAM Distinction is being made only based on what kind of dated is being transferred to the program RAM therefore the 2 program RAM R W check and the error of the above 3 and 4 occur due to the same factor in terms of hardware Cause of Error Same as 2 Sub CPU reset check The MEGA CD system is equipped with the CPU 68000 amp 780 of the Mega Drive side and the CPU 68000 IC1 of the MEGA CD side For the sake of convenience the former is called the main CPU or main side and the later is called sub CPU or sub side Here try resetting from the Mega Drive side to the sub CPU and check if a normal response is returned Cause of Error 1 1 defect the surroundings of G A gate array IC2 etc COMMUNICATION CHECK Check if the communication between the Mega Drive side and the sub CPU 1 1 goes well or not The circuit of this purpose is located in the G A 1 2 therefore the cause of error may include G A Ic2 and sub CPU 1 1 etc Cause of Error the surroundings of G A IC2 sub CPU IC1 etc Communication flag R W check Perform R W on the flag inside G A required for communica tion and check if they function properly Communication port Access the communication port in G A and check its function Stopwatch check Check the function of the watch located in G A WORD RAM PART IC11 1 12 Check the functions related to the word RAM IC11 1022 The word RAM executes programs and p
82. erforms data processing for graphic rotation etc Causes of Error here can include the G A IC2 and word RAM parts Cause of Error the surroundings of G A IC2 and word RANG 1 11 IC12 pattern disconnection between the two m if there are some passing items in the followings the possibility of pattern disconnection is considered to be low 2M mode R W check 2M mode select check Graphic mode check Graphic overwrite mode check Graphic underwrite mode check 1M mode R W check 1M mode swap check 1M mode overwrite mode check 1M mode underwrite mode check VRAM image check 11 Word RAM to VRAM DMA check ovosaubw nh PERIPHERAL IC Check peripheral ICs One is to check the access to the PCM RAM IC13 14 and another is to check the function of the backup RAM 1 10 PCM wave memory R W check Cause of Error the surroundings of PCM IC IC3 and PCM RAM IC13 14 Backup RAM check Cause of Error the surroundings of Backup RAM 1 10 battery 1 backup power control IC IC9 CD INTERFACE PART Check whether the interchange with the CD drive can be carried out properly or whether the CD drive itself operates properly Cause of Error the surroundings of G A Ic2 CN1 the connect ing cable between CN1 and CD drive etc 3 1 CD DRIVE connection check Communication 2 TOC Read check 3 Sub code read check CD DATA READ CHECK Check CD data itself read by the CD drive and data proc
83. essing Cause of Error the surroundings of G A IC2 1 the connect ing cable between CN1 and the CD drive the CD drive CD IC15 etc 1 SUB CPU Read check 2 Main CPU Read check 3 Program RAM DMA check 4 PCM RAM DMA check 5 Word RAM 1M mode DMA check 6 Word RAM 2M mode DMA check SOUND CHECK Actually replay the CD sound and listen to it with your ears for checking Cause of Error CN3 the connecting cable between CN3 and the sub board the sub board etc 1 CD DA check Replay of the 14th music of the check CD ERROR MESSAGE LIST 10 12 12 MEGA CD INTERFACE PART BOOT ROM READ ERROR The read of the boot ROM IC4 is not done normally SUB CPU RESET ERROR The SUB CPU IC1 is not reset PROGRAM RAM R W ERROR The R W of the program RAM IC5 to 8 is not done normally BIOS TRANSFER ERROR The R W of the program RAM IC5 TO 8 is not done normally or the read of the boot ROM IC4 is not done normally SYSTEM TRANSFER ERROR The R W of the program RAM IC5 to 8 is not done normally or the read of the ROM of Mega Drive side of the check cartridge is not done normally SUB CPU RELEASE RESET ERROR The SUB CPU 1 1 reset cannot be canceled SUB CPU NOT READY The SUB CPU Icl does not function normally CD INTERFACE PART The followings are the functions of the circuit in G A IC2 COMMUNICATION FLAGS R W ERROR The R W of the communication port is not done norma
84. lly COMMUNICATION PORT R W ERROR The R W of the communication port is not done normally STOPWATCH MAX TIME ERROR The stopwatch time has exceeded the upper limit value STOPWATCH MIN TIME ERROR The stopwatch time is less than the lower limit value WORD RAM PART IC11 IC12 WORD RAM MODE ERROR The mode of the word RAM is not switched Ld 13 14 15 16 17 18 19 20 21 22 23 24 25 WORD RAM 2 MODE MAIL R W ERROR gt The R W is not performed normally from the main side in the word RAM 2M mega mode WORD RAM 2M MODE M gt S ERROR Switching is not performed normally from the main side to the sub side in the word RAM 2M mega mode WORD RAM 2M MODE SUB R W ERROR The R W is not performed normally from the sub side in the word RAM 2M mega mode WORD RAM 2M MODE M gt S ERROR Switching is not performed normally from the sub side to the main side in the word RAM 2M mega mode GRAPHIC MODE NORMAL IMAGE ERROR The graphic image data of the normal mode is not created normally GRAPHIC MODE OVERWRITE IMAGE ERROR The graphic image data of the overwrite mode is not created normally GRAPHIC MODE UNDERWRITE IMAGE ERROR The graphic image data of the underwrite mode is not created normally WORD RAM 1M MODE MAIN R W ERROR The R W from the main side is not performed normally in the word RAM 1M mega mode WORD DRAM 1M MODE SUB R W ERROR The R W from the su
85. ound error level 3 number found 3 of all checked number found 3 of soft checked nu of of ram veirfy checked of number of nusder of number total of vector error number 100181 of quick check number ivrefi minlmum voltage ivrefl marinus voltate ivrefl averate offset vrefl average count vrefh alninua voltate back up power on average count ck up power off minim back off back up poser off averate back up power off averai charte power minisun voltate power on voltate voltate count aimum voltate on averate count erate count offset msiniwus voltate c vec marimum voltate icdvec average 12MMz 1501 125MNz 25MMz 25MNz everate BEL CD uni t DFCK CO uni t CD uni t cdvec ave battery winiwuw voltate ie count current current count voltate voltate count clock clock count clock clock number number number SEGA ENTERPRISES LTD TryZ itWu 2 ARMA MEGA CD CHECKER PART No 610 0276 0018 031 6 SDFCE CD unit average count 0018 0320 sin 0018 0324 0018 0328 0018 0334 0018 0338 168000 tn ain 0018 033 468000 En 0018 0340 168000 En 0018 0346 0018 0350 14 32 error bit sinlsuw 0018 0354 WA IM 3
86. ress Strobe 5 7 Low Yes No Read Write RW Read High Yes No Write Low 1 Upper and Lower Data Strobes 905 LDS mn Low Yes Data Transfer Acknowledge DTACK An Low No No Bus Request BR An Low No No Bus Grant wn Low No No Bus Grant Acknowledge An Low No No Interrupt Priority Level An Low No No Bus Error An Low No No Reset AD Low No No x eL m Halt BN Low Enable un High No No Valid Memory Address 27 Low Yes No Valid Peripheral Address VPA An Low No No Function Code Output FC 7 High Yes No Clock CLK An High No No Power Input Vec An Ground Vss An la MAIN BOARD 1C EEE 1 2 3 BR B6 om RAN 103 905 Bus 16 3 Address 23 2 Vararan a HMCS6800 Vcc 2 im MAIN PLCC BOARD Scale 3 2 mmlinch 68 25150 40 990 0 005 La T D D I 042 10 1040 017 0004 To 310 0020 24 2000 9531 8 SEATING PLANED MAIN BOARD 1 2 1 3 MB634120 3 5 SCHE MB634120 BPR u a SEGA 815 5548 8 4
87. ting of Assy Side Knob and Assy Side Cover 1 Set Assy Side Knob on the Bottom Case 2 Set Connector of Assy Side Cover to Main Board 3 Fix 2 screws 203 Setting of Top Case 1 Firmly set the Top Case to Bottom Case 2 Fix 2 screws 202 Screw fixing of Bottom Case 1 Upset the unit 2 Fix 6 screws 201 to the Bottom Case MEGA CD EUROPE SPARE PARTS LISTS MEGA CD SPARE PARTS LIST FOR EUROPE Ino parts No PARTS No DESCRIPTION 253 6437 Top Case MEGA CD 839 0534 ASSY MEGA CD CONNECT BD EXPORT MEGA CD EUROPE ACCESSORIES LIST MEGA CD ACCESSORIES LIST FOR EUROPE DESCRIPTION AC ADAPTOR AC220V DC10V 1 2A 400 5127A AC ADAPTOR AC240V DC10V 1 2A MEGA CD EXPORT POB REPAIR PROCEDURE Je Quvog Bns 30 39NVID WOlVQV OV 30 39WID E 40 AOO 90714 30 39WID QUVOS ANS 2 QIVOS NIVH NHAIHB 1 2 244 30 39NVID AVO8 8S 04 08 3138 7199 934 40 124440 Pla 30 39WID sano 30 zu QAVO8 NIVR 30 39NYHD 123330 09 08 815 193430 YOLavav IV 123330 AI VIM 0300 Md 30 3015 0 94 10 123140 N00S 103330 aeo Iu 34140 123110 GuvOg NIVK 2 aseo T ase NO LON AOd LON 3un121d 1 eseo ONIXIN 40 123334 ANNOS sex 2 aseo 1 aseo 3800
Download Pdf Manuals
Related Search