DOWNLOAD Sony SA-WM20 Service Manual ↓ Size: 888.98 KB | Pages: 11 in PDF or view online for FREE

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

3
SA-WM20
SECTION 2
DIAGRAMS
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted.  pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise
specified.
C
: panel designation.
For printed wiring boards.
Note:
X
: parts extracted from the component side.
Y
: parts extracted from the conductor side.
b
: Pattern from the side which enables seeing.
: B+ Line.
: B– Line.
• Voltages are dc with respect to ground under no-signal con-
ditions.
no mark : Power on
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10M
).
Voltage variations may be noted due to normal preduction
tolerances.
• Signal path.
K
: AUDIO
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
2-1. Circuit Boards Location
MAIN board
POWER IC board
LED board
SWITCH board
CONTROL board
Note:
The components identi-
fied by mark 
0
 or dotted
line with mark 
0
 are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque 
0
 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
• Abbreviation
CND : Canadian model
SP
: Singapore model
MX
: Mexican model
MY
: Malaysia model
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.
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Sony SA-WM20 Service Manual ▷ Download

  • DOWNLOAD Sony SA-WM20 Service Manual ↓ Size: 888.98 KB | Pages: 11 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony SA-WM20 in PDF for free, which will help you to disassemble, recover, fix and repair Sony SA-WM20 Audio. Information contained in Sony SA-WM20 Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.