Sega Mega-CD User manual

MAINTENANCE MANUAL
EXPORT
August, 1992
SE GA ENTERPRISES, LTD.
Rev. A

1 .
MEG.A-CD
~.AINTENANCE MANUAL
BLOCK DIAGRAM
EUROPE
•·.
·.· 1 . . ,E ·x '·+
>ND ·. :
2. ASSEMBLY DRAWING _6
2-1 . GENERAL REFERENCE NUMBER LI ST 4
2-2. ASSEMBLY LIST 5
1001 TOP CASE ASSEMBLY 6-f
1002 SIDE COVER & SIDE KNOB ASSEMBLY ~-q
1003 SIDE COVER ASSEMBLY (0--t/
1004 CD-ROM UNIT SHIELD ASSEMBLY !~~(~
1005 MAIN BOARD ASSEMBLY l4-f5
1006 CD DRIVE UNIT & SUB BOARD ASSEMBLY }b-(l
1007 BOTTOM SHIELD & FRONT COVER ASSEMBLY lb'-/~
2-3. PROCEDURE OF DISASSEMBLY AND ASSEMBLY ~-JI
3.
SPARE PARTS LIST
4.
ACCESSORIES LIST
5.
PCB REPAIR PROCEDURE
6.
SOFT & HARD CHECK MANUAL
;ft6 -

7 .
PARTS
SPECIFICATION
,,
7-1.
MAIN BOARD I
Cl IC HD68HCOOOCP-12
7-2.
MAIN BOARD IC2
IC
CUSTOM MCE2
MB634120
7-3.
MAIN BOARD IC3 IC CUSTOM RF5Cl64A
7-4.
MAIN BOARD
IC6 IC MB3790
7-5.
MAIN BOARD I C7. 8
IC TC511664BZ-80
7-6.
MAIN BOARD
ICl0.11 IC
TC51832FL-10
7-7.
MAIN BOARD
IC13
IC LC8951
7-8.
MAIN BOARD
IC14.15
IC MB8464A-80
7-9.
SUB BOARD I
Cl IC LC7883KM
7-1 0. SUB BOARD
IC2
IC LC7881M-C
7-11. SUB BOARD
IC3.4.5
IC
µPC844G2
8. PARTS LIST OF PCB
8-1. IC BD MEGA-CD MAIN BD EXPORT
8-2. IC BD MEGA-CD SUB BD EXPORT
8-3 . ASSY MEGA-CD CONNECT BD EXPORT
9.
SCHEMATIC DIAGRAM
9-1.
PC BD MEGA-CD MAIN BD
9-2.
PC BD MEGA-CD SUB
BD
9-3. PC
BD
MEGA-CD CONNECT BD
1 0. MOUNT DIAGRAM
10-la. IC BD
MEGA-CD MAIN BD COMP SIDE
10-lb. IC BD
MEGA-CD MAIN
BD SOLD SIDE
10-2 a.
IC
BD MEGA-CD SUB BD COMP SIDE
10-2b.
IC
BD MEGA-CD SUB
BD
SOLD SIDE
10-3a.
IC
BD
MEGA-CD CONNECT BD
COMP
SIDE
10-3 b.
IC
BD
MEGA-CD CONNECT
BD SOLD
SIDE
11. PCB DESIGN
SPEC.
b)-64
315-5548
6~-f'B
315-5476A
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106
10(
10%
r e>q
f~'l
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11-la.
PC
11-lb.
PC
BD
MEGA-CD
BD MEGA-CD MAIN
BOARD COMP SIDE LAYER \\\
MAIN BOARD SOLD SIDE LAYER \t<J-
l 1-2a.
PC BD
11-2b.
PC BD
11-2a.
PC BD
1 l-2b.
PC BD
MEGA-CD
MEGA-CD
MEGA-CD
MEGA-CD
SUB BOARD
COMP SIDE LAYER \\)
SUB BOARD SOLD . SIDE LAYER \\?J
CONNECT BOARD COMP SIDE LAYER \\~
CONNECT BOARD SOLD SIDE LAYER ,,5

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VER 0.5 1991/07/02

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MEGA-CD
EXPORT
ASSEIVIBLY DRAVVING
3

SE GA-CD
GENE.RAL REFERENCE NUMBER LI ST
·--------------------------------------------------------------------------------------------------
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 SI DE KNOB MEGA-CD
1
253-6442
SI DE 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
SI DE COVER MEGA-CD EXPORT
1
005
253-6439-01
FRONT COVER SEGA-CD USA
1
1 0 1
837-8952
IC BD MEGA-CD MAIN BD EXPORT
1
102 837-8953
IC 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 B LK 6
203 012-0410
TAP SCR PH
4*10
2
204
012-0312
TAP SCR PH
3*12
4
3 0 1
250-5289
SIDE COVER SHIELD
1
302 250-5280
CD-ROM UNIT SHIELD
1
303 250-5287
MA IN B D SH I ELD TOP
1
304 250-5288
MAIN BD SHIELD BOTTOM
1
305 250-5286
BOTTOM SH I ELD MEGA-CD
1
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
501 610-5364
ASSY SIDE COVER MEGA-CD EXPORT
1
- 1 -

ASSEMBL~ LIST FOR SEGA-CD
INDEX ..
1001 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 -
5

PARTS LIST FOR ScGA-CD
1001 TOP CASE ASSEMBLY
REF NO. PART NO.
001
201
202
253-6437
012-0310
029-0089
DESCRIPTION
TOP CASE MEGA-CD
TAP SCR PH 3* 1 0
TAP SCR PH 3*8 BLK
- 3 -
QTY
1
6
2

100 1 TOP CASE ASSEMBLY
7

PARTS LIST FOR SEGA-CD
1002 SIDE COVER & SIDE KNOB ASSEMBLY
REF NO . PART NO.
003
203
501
xxx-xxxx
253-6442
253-6443
029-0060
012-0410
610-5364
DESCRIPTION
QTY
ASSY SI DE KNOB MEGA-CD 1
SI DE KNOB MEGA-CD 1
SI DE KNOB HOLDER MEGA-CD 1
TAP SCR PH 2.6*6 1
TAP SCR PH 4*10 2
ASSY SI DE COVER MEGA-CD EXPORT 1
- 4 -

1002 SIDE COVER & SIDE KNOB ASSEMBLY

)ARTS LIST FOR SEGA-CD
l 0 0 3 SI DE COVER ASSEMBLY
~EF NO. PART NO.
DESCRIPTION
QTY
)04
253-6441-02 SIDE COVER MEGA-CD EXPORT
1
103
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·
J------8
t------®
ff
·---------

-
:>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 -
fJ

1004 CD-ROM UNIT SHIELD ASSEMBLY

PARTS LI ST FOR SE GA-CD
1005 · MAIN BOARD ASSEMBLY
REF NO . PART NO.
101
201
303
304
837-8952
012-0310
250-5287
250-5288
DESCRIPTION
IC BD MEGA-CD MA IN BD EXPO RT
TAP SCR PH 3*10
MA IN B D SH I ELD T 0 P
MA I N B D SH I ELD B 0 TT 0 M
- 7 -
QTY
1
3
1
1

1005 MAIN BOARD ASSEMBLY

PARTS LIST FOR SEGA-CD
1006 CD DRIVE UNIT & SUB BOARD ASSEMBLY
REF NO. PART NO.
102
201
202
837-8953
012-0310
029-0089
DESCRIPTION
IC BD MEGA-CD SUB BD EXPO RT
TAP SCR PH 3*10
TAP SCR PH 3*8 BLK
QTY
1
2
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 -
/b

1006 CD DRIVE UNIT & SUB BOARD ASSEMBLY
( )
! ti