Sega MEGA DRIVE PAL-G User manual

MAINTENANCE MANUAL
PAL-G
A-ugust, 1992
SE GA ENTER PR I SES, L TD.
Rev. A

IVIE GA
DRIVE
IVIAINTENANCE
PAL-G (GERMANY)
IVIANUAL
1. BLOCK DIAGRAM
2. ASSEMBLY DRAWING
2-1. GENERAL REFERENCE NUMBER LI ST
2-2. ASSEMBLY LIST
1001 TOP CASE ASSEMBLY 1
1002 TOP CASE ASSEMBLY 2
1003 SHIELD PLATE TOP ASSEMBLY
1004 MAIN BOARD ASSEMBLY
2-3. PROCEDURE OF DISASSEMBLY AND ASSEMBLY
3. SPARE PARTS LIST
4. ACCESSORIES LIST
5. PCB REPAIR PROCEDURE
6. SOFT & HARD CHECK MANUAL
7.
PARTS
SPECIFICATION
7-1.
MAIN
BOARD IC l IC
SCN68000C8N64
7-2. MAIN BOARD
IC3 IC 1LPD42832C-15
7-3. MAIN
BOARD IC6 IC Z80A
7-4. MAIN
BOARD IC7 IC 1LPD4364C-15
7-5. MAIN
BOARD
IC8 IC CUSTOM YM7101
315-5313A
7-6. MAIN BOARD
IC 1 1 IC YM2612
7-7. MAIN
BOARD
IC13 IC CXA1145P

8.
PARTS
LIST OF
PCB
8-1.
IC-BD
M5
VA4
8-1.
IC-BD
M5
VA6.5
8-2. ASSY
SUB
BOARD3
M5
8-3.
ASSY
SUB
BOARD
M5
9. SCHEMATIC DIAGRAM
9-1. PC BD M5 PAL-G VA4 MAIN
9-2. PC BD M5 PAL-G VA6.5 MAIN
1 0.
MOUNT
DIAGRAM
10-la. IC
BD
M5 VA4
PAL-G
MAIN
10-lb. IC
BD
M5 VA4
PAL-G
CHIP
10-2a. IC
BD M5
VA6. 5
PAL-G
MAIN
10-2b.
IC
BD M5 VA6. 5
PAL-G CHIP
1 1 . PCB
DESIGN SPEC.
11-la. PC
BD M5 PAL
VA4
MAIN BOARD
COMP SIDE MARK
11-lb.
PC
BD M5
PAL VA4
MAIN BOARD
SOLD S IDE MARK
11-lc.
PC
BD
M5 PAL
VA4
MAIN BOARD COMP SI DE LAYER
11-ld.
PC
BD M5
PAL VA4
MAIN BOARD
SOLD SIDE LAYER
l l-2a. PC BD M5
PAL
VA6.5
MAIN BOARD COMP
SIDE MARK
l l-2b.
PC BD
M5 PAL
VA6. 5
MAIN BOARD SOLD
SIDE MARK
l l-2c.
PC
BD M5 PAL
VA6. 5
MAIN BOARD
COMP SIDE LAYER
l l-2d.
PC BD
M5 PAL
VA6.5
MAIN BOARD
SOLD
SIDE LAYER

MEGA DRIVE
PAL-G (GERMANY)
BLOCK
DIAGRAM

MEGA
OF~ I VE PAL BLOCK
1601 - 18
r----------------------------1
I I
r
Not Used I I I
I
IPERIPHEAIIL DEVICE
I
V-RAM
I
GAME
CARTRIDGE
(FLOPY DISK)
I
64KB
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ANTENNA
·~
~
I / I '\17
~-------------------I
i:I
'
--------------
~-----------------
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b..
-
a:
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... "''
X
L ~DCK
I ZCLK:3.!IHHZ _
VIDEO/
5.:1
0
VCLK! 7 ~ 8HHZ
y m
CN 3 I~
VCLK
CN 2
SC HCLK
HClk ...
RGB/
AUDIO
lLl:lt
" -
I'
~DCK;,; SYNC•
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a:
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Ill
i[4 ~4
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,_
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a:
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a:
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~
SIICA
a:
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VOP
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ADORE SS/CONTROL
BUS t6 bit
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-'.
0
lJ.
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0
Cl
0
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---
u I
ID
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AGB/SYNC
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C.SYNC
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EDCK
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PORT
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w
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w 0
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BUS
I::: VCLK
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RAM
I/0
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,,
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64KB
ARBITER
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AGORESS/CONTAOL BUS
IB
bit
0
a:
u 8 u
1--
u
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w ?
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::::,
5 ...
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a.
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RAM
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BKB
CN5
CNG
CN4
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-------------------
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F;1/'IOL PAOl
2 PLAYER
HOT us:;:o
Option
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TV
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R & D 3 Dept.
r/4/r•

MEGA DRIVE
PAL-G (GERMANY)
ASSEMBLY
DRAWING

1EGA D.RIVE FOR PAL-G
iENERAL REFERENCE NUMBER LI ST
tEF NO. PART NO. DESCRIPTION
V4 QTY V6.5
--------------------------------------------------------------------------------------------------------------
l O1 610-5077-01
ASSY TOP CASE M5 EUROPE
1
610-5077-0lA
ASSY TOP CASE M5 EUROPE VA
(1)
610-5283
ASSY TOP CASE M5 VA EUROPE
(1)
l O2
253-6310-01
BOTTOM CASE M5 PAL-I
1
253-6264
LID M5
1
253-6310-0lA
BOTTOM CASE M5 PAL-I
VA6. 5 1
253-6264
LID M5
1
0 1
837-7459
IC BD M5 VA4 PAL-G
1
837-8779
IC BD M5 VA6.5 PAL-G
1
02 839-0199
ASSY SUB BOARD M5
1 1
03 839-0262
ASSY SUB BOARD3 M5
1 1
10 1 012-0310
TAPSCRPH3*10
6 6
10 2
012-0308
TAP SCR PH 3*8
8 8
: 0 3
029-0227
DELTITE SCR PH 3*6
1 1
: 0 4
029-0097
TAP SCR PH 3* 12 BLK
5 5
: 0 5
250-5161
PLATE NUT MD
1 1
l O1 250-5135
SHIELD PLATE M5 TOP
1 1
l O2 250-5136
SH I ELD PLATE M5 BOTTOM
1 1
l O3 253-6298
SOP CARD EDGE COVER
1 1

301
103
102
101
I 205
«
'ri
303
I
302
002

ASSEMBLY LIST roR MEGA DRIVE PAL-G
INDEX
1001 TOPCASEASSEMBLYl
1002 TOP CASE ASSEMBLY 2
1003 SHIELD PLATE TOP ASSEMBLY
1004 MAIN BOARD ASSEMBLY

"ARTS LI ST FOR MEGA DRIVE PAL-G
1001 TOP CASE ASSEMBLY 1
REF NO. PART NO.
2 0 1
012-0310
DESCRIPTION
TAPSCRPH3*10
QTY
6

l 00 l TOP CASE ASSEMBLY l
------,._201

PARTS LIST FOR MEGA DRIVE PAL-G
1 002 TOP CASE ASSEMBLY 2
REF NO. PART NO.
001
610-5077-01
610-5077-0lA
610-5283
DESCRIPTION
ASSY TOP CASE M5 EUROPE
ASSY TOP CASE M5 EUROPE VA
ASSY TOP CASE M5 VA EUROPE
QTY
( 1 )
(1 )
( 1)

1002 TOP CASE ASSEMBLY 2

"ARTS LIST FOR MEGA PRIVE PAL-G
1003 SHIELD PLATE TOP ASSEMBLY
~EF NO. PART NO.
,02
, 0 3
l O 1
012-0308
029-0227
250-5135
DESCRIPTION
TAP SCR PH 3*8
DELTITE SCR PH 3*6
SHIELD PLATE M5 TOP
QTY
7
1
1

SHI ELD PLATE TOP ASSEMBLY
1003
202
203
202

PARTS LIST FOR MEGA DRIVE PAL-G
1004 MAIN BOARD ASSEMBLY
REF NO. PART NO.
DESCRIPTION QTY
l O1
837-7459
IC BD M5 VA4 PAL-G
(l l
837-8779
IC BD M5 VA6.5 PAL-G
(l )
l O2
839-0199
ASSY SUB BOARD M5
l
103
839-0262
ASSY SUB BOARD3 M5
1
202
012-0308
TAP SCR PH 3*8 1
204
029-0097 TAP SCR PH 3* 12 BLK 5

1004 MAIN BOARD ASSEMBLY
204
204

PROCEDURE OF DISASSEMBLY AND ASSEMBLY OF MEGA DRIVE
FOR
PAL-G (GERMANY)
1. DISASSEMBLY
PROCESS 1 :
Removing the screws from Bottom Case.
PROCESS 2
PROCESS 3
2. ASSEMBLY
PROCESS 1
1) Upset the unit.
2) Remove 6 screws {201) for Bottom Case.
Removing the Top Case.
1) Hold up the Top Case to direction (A).
2) Remove 2 pin connector from Lead wire of
the Power LED fixed on the rear side of
Top Case.
Removing Shield Plate and Main Board
1) Remove 7 screws (202).
2) Remove a screws (203).
3) Remove the Shield Plate.
3) Remove a screw (202).
4) Remove 5 screws (204).
4) Remove the Main Board from Bottom Plate.
Setting of Main Board
1) Set Main Board on the Bottom Case.
At this setting, it is important to coincide
each centre of screwing hole in Main Board
with corresponding each centre of screwing hole
of Bottom Case.
2) Fix 5 screws (204).
3) Fix 8 screws (202).
4) Set the Shield Plate on Main Board.
At this setting, it is important to coincide each
holes to the Bosses of Bottom Case.
5) Fix a screw (203).
6) Fix 7 screws (202)
7) At the setting of Sub Boards (for phone and AC
Adaptor), it is important to correctly set the
holes of Sub Board to Bosses of Bottom Case.
1

PROCESS 2
PROCESS 3
,,,
Setting of Top Case
1) Set the Knob of volume to the scale position "0"
and power switch knob to off position on the Top
Case.
2) Insert two pin connector of power LED lead wire
into the lead wire of LED fixed on the rear side
of Top Case.
In this insertion, it is important to fit the
longer lead wire of LED (anode) to the red lead
wire of connector (positive polar).
3) Firmly set the Top Case to Bottom Case.
Screw fixing of Bottom Case.
1) Upset the unit.
2) Fix 6 screws (201) to the Bottom Case.
2

MEGA DRIVE
PAL-G (GERMANY)
SPARE
PARTS LISTS