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
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Sony SA-WM20 Service Manual ▷ View online

3
SECTION 1
GENERAL
• Location of controls
  – Front view (a part) –
1
2
3
4
5
1 POWER (@/1) button
2 POWER indicator
3 PHASE (4 NORMAL/$ REVERSE) button
4 CUT OFF FREQ dial
5 LEVEL dial
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 
Ω
 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
Ω
).
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
Page of 11
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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.

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