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Model
SA-WM20
Pages
11
Size
888.98 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
sa-wm20.pdf
Date

Sony SA-WM20 Service Manual ▷ View online

4
4
SA-WM20
2-2. PRINTED WIRING BOARD
• See page 3 for Circuit Boards Location.
D101
A-2
D102
A-2
D103
A-2
D104
A-2
D301
B-3
D302
B-3
D303
C-5
D304
A-6
D401
A-7
D402
A-6
D403
A-4
D404
A-4
IC101
B-1
IC102
A-3
Q301
C-4
Q302
C-4
Q303
C-5
Q304
C-4
Q401
B-1
• Semiconductor
Location
Ref. No.
Location
There are a few cases that the part isn’t mounted in
model is printed on diagram.
5
5
SA-WM20
2-3. SCHEMATIC DIAGRAM
6
SA-WM20
3-1. FRONT SECTION
SENTION 3
EXPLODED VIEWS
SP101
not supplied
not supplied
1
2
3
4
5
6
6
8
7
12
7
7
9
12
10
11
11
The  components  identified  by
mark 
0 or dotted line with mark
0 are critical for safety.
Replace  only  with  part  number
specified.
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay  should  be  anticipated  when  ordering
these items.
• The mechanical parts with no reference num-
ber in the exploded views are not supplied.
• Accessories and packing materials are given
in the last of the electrical parts list.
• Abbreviation
CND : Canadian model
SP : Singapore model
MX : Mexican model
MY : Malaysia model
NOTE:
• -XX and -X mean standardized parts, so they
may  have  some  difference  from  the  original
one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
Parts Color Cabinet's Color
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
X-4953-516-1 FRAME (BLACK) ASSY, GRILLE
(E,US,MX,CA,AEP,UK,MY,SP)
1
X-4953-686-1 FRAME (GRAY) ASSY, GRILLE (E,US,AEP,MY,SP)
2
4-232-524-01 PANEL, FRONT (SILVER)(E,US,AEP,MY,SP)
2
4-232-524-11 PANEL, FRONT (BLACK)
(E,US,MX,CA,AEP,UK,MY,SP)
3
1-680-714-12 PWB, CONTROL
4
4-232-527-01 KNOB, VOLUME (SILVER)(E,US,AEP,MY,SP)
4
4-232-527-11 KNOB, VOLUME (BLACK)
(E,US,MX,CA,AEP,UK,MY,SP)
5
4-232-531-01 PLATE, LIGHT GUIDE
6
4-973-938-81 KNOB (A), PUSH (SILVER)(E,US,AEP,MY,SP)
6
4-973-938-91 KNOB (A), PUSH (BLACK)
(E,US,MX,CA,AEP,UK,MY,SP)
7
7-685-649-79 SCREW +BVTP 3X14  TYPE2 IT-3
8
1-680-715-12 PWB, SWICH
9
1-680-716-12 PWB, LED
10
4-232-534-01 PACKING (DUCT)
11
4-914-430-11 SCREW (4X20), TAPPING
12
7-685-646-79 SCREW +BVTP 3X8 TYPE2 N-S
SP101
1-529-995-11 SPEAKER (20CM)
Les composants identifiés par une
marque 
0  sont  critiques  pour  la
sécurité.
Ne les remplacer que par une piéce
portant le numéro spécifié.
6
3-2. AMP SECTION
F1
F2
T1
not supplied
not supplied
not supplied
51
52
53
54
54
54
55
56
57
54
54
54
57
60
60
57
58
59
63
61
62
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
51
1-680-713-12 PWB, MAIN
52
A-4412-797-A CABINET ASSY(SILVER) (E,US,AEP,MY,SP)
52
A-4412-798-A CABINET ASSY(BLACK)
(E,US,MX,CA,AEP,UK,MY,SP)
* 53
3-703-150-11 CLAMP (E,AEP,UK,MY,SP)
54
7-685-649-79 SCREW +BVTP 3X14  TYPE2 IT-3
55
1-680-717-12 PWB, POWER IC
56
4-234-079-11 PANEL, REAR (US,MX,CA)
56
4-234-079-41 PANEL, REAR (AEP,UK,MY,SP)
56
4-234-079-51 PANEL, REAR (E)
57
4-914-518-11 SCREW (4X14), (+) (B) TAPPING
58
1-777-071-11 CORD, POWER (AEP,UK)
58
1-783-525-11 CORD, POWER (TRACKING) (E)
58
1-783-820-11 CORD, POWER (US,MX,CA,MY,SP)
* 59
3-703-244-00 BUSHING (2104), CORD
60
7-685-660-19 SCREW +BVTP 4X10 TYPE2 N-S
61
3-701-946-21 LABEL, FUSE RATING
62
4-234-637-01 CUSHION (TRANSFORMER)
63
4-956-370-02 BAND, PLUG FIXED (UK)
0F1
1-532-500-31 FUSE (T630mAL/250V)(AEP,UK,MY,SP)
0F1
1-532-502-31 FUSE (T1.25AL/250V)(E)
0F1
1-532-742-11 FUSE, GLASS CYLINDRICAL(DIA.5)
(1.6A/125V)(US,MX,CA)
0F2
1-532-499-31 FUSE (T400mAL/250V)(E)
0T1
1-435-879-11 TRANSFORMER, POWER (US,MX,CA)
0T1
1-435-880-11 TRANSFORMER, POWER (AEP,UK,MY,SP)
0T1
1-435-881-11 TRANSFORMER, POWER (E)
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