SA-WM40 - Sony Audio Service Manual (repair manual)

Model: SA-WM40
Pages: 12
Size: 1.23 MB
Type: PDF
Document: Service Manual
Brand: Sony
Device: Audio
File: sa-wm40.pdf
Date: 2018-11-20

Next: Sony SA-WM40 (serv.man2) Service Manual

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SERVICE MANUAL
ACTIVE SUBWOOFER
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
SPECIFICATIONS
SA-WM40
Ver 1.2  2002.09
9-929-065-12
Sony Corporation
2002I0500-1
Home Audio Company
C
 2002.09
Published by Sony Engineering Corporation

2
MODEL  IDENTIFICATION
– Rear View –
ATTENTION  AU  COMPOSANT  AYANT  RAPPORT
À  LA  SÉCURITÉ!
LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  
0
SUR  LES  DIAGRAMMES  SCHÉMATIQUES  ET  LA  LISTE
DES  PIÈCES  SONT  CRITIQUES  POUR  LA  SÉCURITÉ
DE  FONCTIONNEMENT.  NE  REMPLACER  CES  COM-
POSANTS  QUE  PAR  DES  PIÈCES  SONY  DONT  LES
NUMÉROS  SONT  DONNÉS  DANS  CE  MANUEL  OU
DANS  LES  SUPPLÉMENTS  PUBLIÉS  PAR  SONY.
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
0
  OR  DOTTED
LINE  WITH  MARK  
0
  ON  THE  SCHEMATIC  DIAGRAMS
AND  IN  THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE
OPERATION.  REPLACE  THESE  COMPONENTS  WITH
SONY  PARTS  WHOSE  PART  NUMBERS  APPEAR  AS
SHOWN  IN  THIS  MANUAL  OR  IN  SUPPLEMENTS  PUB-
LISHED  BY  SONY.
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE  TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able.  (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15 
µ
F
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
with this indication
: US, Canadian models
without this indication : Except US, Canadian models

3
3
SECTION  1
GENERAL
SECTION  2
DIAGRAMS
• Location of controls
   – Front View (a part) –
– Upper View (a part) –
– Rear View (a part) –
2-1.
NOTE  FOR  PRINTED  WIRING  BOARD  AND  SCHEMATIC  DIAGRAM
• Circuit Boards Location
CONTROL board
POWER SW UC board
PS board
POWER TR board
MAIN board

Note on Schematic Diagram:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
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.
•
U
: B+ Line.
•
V
: B– Line.
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : Power on
(
) : Automatic power off
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
: AUDIO
• Abbreviation
AUS
: Australian model
CND : Canadian model

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
pièce por tant le numéro
spécifié.

Note on Printed Wiring Boards:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the component side.
•
b
: Pattern from the side which enables seeing.

4
4
SA-WM40
• Semiconductor
Location
Ref. No.
Location
D501
B-3
D502
B-3
D503
D-3
D504
C-2
D505
D-3
D506
C-2
D507
B-8
D508
B-8
D509
F-3
D510
F-2
D511
B-11
D512
D-11
D601
F-4
D602
F-4
D605
G-4
D606
H-2
D801
I-3
D802
I-3
D803
I-2
D804
I-2
D810
H-12
D817
B-4
D818
B-4
D819
B-5
D820
B-5
D821
C-4
D822
C-5
IC501
C-3
IC502
B-3
IC503
B-7
IC504
C-8
IC505
E-3
IC506
B-8
IC507
D-4
IC508
C-8
Q503
F-2
Q504
F-3
Q505
E-3
Q507
B-11
Q508
C-11
Q601
E-4
Q602
E-4
Q603
F-4
Q604
E-4
Q605
E-4
Q606
F-4
Q607
E-8
Q608
F-3
Q609
E-9
Q610
E-7
Q611
G-4
Q612
G-4
Q613
G-3
Q614
G-4
Q801
C-4
Q802
C-5
MAIN BOARD
CONTROL BOARD
POWER TR BOARD
PS BOARD
POWER SW UC
 BOARD
JK501
IN
L
OUT
LINE
TM501
IN
OUT
SPEAKER
+
+
–
–
–
–
+
+
R
SW502
POWER SAVE
AUTO
OFF
(CHASSIS)
SP601
1-677-924-
(11)
11
RLY601
1-677-927-
(11)
11
1
3
1
3
VR501
LEVEL
SW501
PHASE
VR502
1
5
CUT OFF FREQ
D512, S801
POWER
3
1
NORMAL     REVERSE
1-677-925-
(11)
11
1-677-933-
(11)
11
AC IN
T801
POWER TRANSFORMER
T851
POWER TRANSFORMER
1-677-926-
(11)
11
1
A
2
3
4
5
6
7
8
9
10
11
12
B
C
D
E
F
G
H
I
–1
–2
2-2.
PRINTED  WIRING  BOARDS (US, Canadian models)
•
 See page 3 for Note on Printed Wiring Boards.
• See page 3 for Circuit Boards Location.
Ver 1.2

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Here you can read online and download Sony SA-WM40 Service Manual in PDF. SA-WM40 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony SA-WM40 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.

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