MAINTENANCE MANUAL EXPORT August, 1992 SEGA ENTERPRISES, LTD. Rev. A MEGA-CD l\IIAINTENANCE MANUAL EUROPE +.INDEX+ 1 . BLOCK DIAGRAM 2. ASSEMBLY DRAWING ,6 2-1. GENERAL REFERENCE NUMBER LIST 4 2-2. ASSEMBLY LIST 5' 1001 TOP CASE ASSEMBLY ~~~ 1 0 0 2 S I D E C 0 V E R & S I D E K N 0 B AS S ~M B L Y &"'- q 1003 SIDE COVER ASSEMBLY 10·-/l 1004 CD-ROM UNIT SHIELD ASSEMBLY j}~(~ 1005 MAIN BOARD ASSEMBLY l4-i5 1006 CD DRIVE UNIT & SUB BOARD ASSEMBLY lb-(7 1 0 0 7 B 0 T T 0 M S H I E L D & F R 0 NT C 0 V E R A S S EM B L Y I S"' --1 q 2-3. PROCEDURE OF DISASSEMBLY AND ASSEMBLY '()_gJ -JI 3. SPARE PARTS LIST 4. ACCESSORIES LIST 5. PCB REPAIR PROCEDURE 6. SOFT & HARD CHECK MANUAL ,~- 7 . PARTS SPECIFICATION 'I b) -&4 7-1. MAIN BOARD I C 1 IC HD68HCOOOCP-12 7-2. MAIN BOARD IC2 IC CUSTOM MCE2 MB634120 315-5548 6<-11~ 7-3. MAIN BOARD IC3 IC CUSTOM RF5Cl64A 315-5476A ., <4--'&-t? 7-4. MAIN BOARD IC6 IC MB3790 S:\ 7-5. MAIN BOARD I C7. 8 IC TC511664BZ-80 S'J. 7-6. MAIN BOARD IC10.11 IC TC51832FL-10 )' j 7-7. MAIN BOARD IC13 IC LC8951 &A,-~·5 7-8. MAIN BOARD IC14.15 IC MB8464A-80 ~b 7-9. SUB BOARD I C 1 IC LC7883KM .<fsl 7-10. SUB BOARD IC2 IC LC7881M-C ~' 7-11. SUB BOARD IC3.4.5 IC J.LPC844G2 oq_ 8. PARTS LIST OF PCB C1& 8-1. IC BD MEGA-CD MAIN BD EXPORT <1t- L-\s 8-2. I C BD MEGA-CD SUB BD EXPORT 9l{-C(5 8-3. ASSY MEGA-CD CONNECT BD EXPORT ~b 9. SCHEMATIC DIAGRAM 9l 9-1. PC BD MEGA-CD MAIN BD Ci~ --1 C) I . 9-2. PC BD MEGA-CD SUB BD \0 }- 9-3. PC BD MEGA-CD CONNECT BD I o·?:. 1 0. MOUNT DIAGRAM tDLf 10-1a. IC BD MEGA-CD MAIN BD COMP SIDE !Oj 10-1b. IC BD MEGA-CD MAIN BD SOLD SIDE IDb 10-2a. IC BD MEGA-CD SUB BD COMP SIDE 10( 1 0-2 b. IC BD MEGA-CD SUB BD SOLD SIDE JO% 10-3a. IC BD MEGA-CD CONNECT BD COMP SIDE req 1 0-3 b. IC BD MEGA-CD CONNECT BD SOLD SIDE reo, 1 1. PCB DESIGN SPEC. 11-1a. PC BD MEGA-CD MA I N B 0 A RD C 0 MP S I DE LAYER I \ \ 11-lb. PC BD MEGA-CD MAIN BOARD SOLD SIDE LAYER \l'lt'v 11-2a. PC BD MEGA-CD SUB BOARD COMP SIDE LAYER \\''J 11-2b. PC BD MEGA-CD SUB BOARD SOLD SIDE LAYER \\~ ll-2a. PC BD MEGA-CD CONNECT BOARD COMP SIDE LAYER \l~ 11-2b. PC BD MEGA-CD CONNECT BOARD SOLD SIDE LAYER 1\5 MEGA-CD EXPORT BLOCK DIAGRAM \ rl KEGA-CD liARD KAfiUAL M E VRAH 1 c 1 G EJ I I A 68000 AORS lO Eeeo0 ADRS PRG-fW.I D ~ BOOT-ROH 1 c.(, R ~IAIH DATA 12.9-!Hz 4Hbit lC7 I CPU 1H bit DATA fW.I v ~ 1?-1 RAH I SUB rn E lC.f CPU LEO t X' TAL J:t~ A r-r~====:::-' ~------~~---~----~ I 5~H flz 0-i~ 0 ~0~'5111'- R It s AORS v~ I c. llJ 1HbitRAH lc 11 8KX8bit ('n'ORD-RAH 0) BACKUP RAH OA lA 16bit - _ AORS ME G A·_ CD .E N G I NE 1HbitRAH lCil (WORD-RAH 1) ~--o~A.TA'"=11 b~D1 t~L,__-~ __CJ_t A---r----:-------.-----~ RF5C164 PD+§~ --- (SOUND) co I c 3 DATA JT.J~ UHA I L IJ 0/A ll P-RAH Ilq'1 _ 7·1J ~r- LPF LC8951 I'J77~J. - CDC LC7881 64KX8bit <~---o~·~·HIX-......__ (CDfflij-JWJ3Y) 4KHz 20Kflz AH?. KSK-120!3A LPF I \ 'V @ @ S-fW1 I L R LIHEOUT 16KX8bi t VER 0.5 1991/07/02 MEGA-CD EXPORT ASSEl\/IBLY DRA"W"I NG { SEGA-CD GENERAL REFERENCE NUMBER LIST REF NO. PART NO. DESCRIPTION QTY --------------------------------------------------------------------------------------------------- 001 253-6437 TOP CASE MEGA-CD 1 002 610-5268 ASSY BOTTOM CASE MEGA-CD 1 253-6438 BOTTOM CASE MEGA-CD 1 601-6727 RUBBER FOOT MEGA-CD 4 003 xxx-xxxx 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 1 0 1 837-8952 I C B D MEG A-CD MAIN B D EX P 0 R T 1 102 837-8953 I C BD MEGA-CD SUB BD EXPORT 1 1 0 3 839-0534 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 xxx-xxxx ASSY CD DRIVE UNIT (JVC EL"tv'l-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 - 1 - ASSEMBLY LIST FOR SEGA-CD INDEX- 1 001 TOP CASE ASSEMBLY 1002 SIDE COVER & SIDE KNOB ASSEMBLY 1003 SIDE COVER ASSEMBLY 1004 CD-ROM UNIT SHIELD ASSEMBLY 1005 MAIN BOARD ASSEMBLY 1006 CD DRIVE UNIT & SUB BOARD ASSEMBLY 1007 BOTTOM SHIELD & FRONT COVER ASSEMBLY - 2 - 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 - 3 - 1001 TOP CASE ASSEMBLY 7 PARTS LIST FOR SEGA-CD 1002 SIDE COVER & SIDE KNOB ASSEMBLY REF NO. PART NO. DESCRIPTION QTY 003 xxx-xxxx 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 1 203 012-0410 TAP SCR PH 4*10 2 50 1 610-5364 ASSY SIDE COVER MEGA-CD EXPORT 1 - 4 - 1002 SIDE COVER & SIDE KNOB ASSEMBLY )ARTS LIST FOR SEGA-CD '003 SIDE COVER ASSEMBLY ~EF NO. PART NO. DESCRIPTION QTY )04 253-6441-02 SIDE COVER MEGA-CD EXPORT 1 l 0 3 839-0534 ASSY MEGA-CD CONNECT BD EXPORT 1 204 012-0312 TAP SCR PH 3*12 4 3 0 1 250-5289 SIDE COVER SHIELD 1 - 5 - 10 1003 SIDE.COVER ASSEMBLY· r. r. .J------0 t-------@) I i - )ARTS LIST FOR SEGA-CD l004 CD-ROM UNIT SHIELD ASSEMBLY ·----------------------------------------------------------------------~--------------------------- REF NO. PART NO. DESCRIPTION QTY 2 0 1 012-0310 TAP SCR PH 3*10 3 302 250-5280 CD-ROM UNIT SHIELD 1 - 6 - IJ 1004 CD-ROM UNIT SHIELD ASSEMBLY PARTS LIST FOR SEGA-CD 1005 MAIN BOARD ASSEMBLY REF NO. PART NO. DESCRIPTION QTY 1 0 1 837-8952 IC BD MEGA-CD MAIN BD EXPORT 1 201 012-0310 TAPSCRPH3*10 3 303 250-5287 MAIN BD SHIELD TOP 1 304 250-5288 MAIN BD SHIELD BOTTOM 1 - 7 - i4 1005 MAIN BOARD ASSEMBLY PARTS LIST FOR SEGA-CD 1006 CD DRIVE UNIT & SUB BOARD ASSEMBLY REF NO. PART NO. DESCRIPTION QTY 102 837-8953 IC BD MEGA-CD SUB BD EXPORT 1 2 0 1 012-0310 TAP SCR PH 3*10 2 202 029-0089 TAP SCR PH 3*8 BLK 4 401 xxx-xxxx 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 - 8 - 1006 CD DRIVE UNIT & SUB BOARD ASSEMBLY ( ) R- /7 - PARTS LIST FOR SEGA-CD 1007 .BOTTOM SHIELD & FRONT COVER ASSEMBLY REF NO. PART NO. DESCRIPTION QTY 002 610-5268 ASSY BOTTOM CASE MEGA-CD 1 253-6438 BOTTOM CASE MEGA-CD 1 601-6727 RUBBER FOOT MEGA-CD 4 005 253-6439-01 FRONT COVER SEGA-CD USA 1 305 250-5286 BOTTOM SHIELD MEGA-CD 1 - 9 - )f 1007 B OTTOM SHIELD & FRONT COVER AS SEMBLY 0 /I 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.