Sony SAWM-40 Service manual

SERVICE MANUAL
Ver 1.2 2002.09
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
9-929-065-12 Sony Corporation
2002I0500-1 Home Audio Company C 2002.09 Published by Sony Engineering Corporation
ACTIVE SUBWOOFER
SAFETY CHECK-OUT
s
After correcting the original service problem, perform the follow­ing 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. Follo w the manufacturers’ instructions to use these instruments.
2. A battery-operated AC milliammeter. The Data Pr ecision 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” indica­tion is 0.75 V, so analog meters must have an accurate low­voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex­amples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V A C range are suit­able. (See Fig. A)
To Exposed Metal Parts on Set
MODEL IDENTIFICATION – Rear View –
1.5 k
0.15 µF
Fig. A. Using an AC voltmeter to check AC leakage.
Earth Ground
AC voltmeter (0.75 V)
with this indication : US, Canadian models without this indication : Except US, Canadian model
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIA GRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANU AL OR IN SUPPLEMENTS PUB­LISHED BY SONY.
2
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM­POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SECTION 1
d

GENERAL

SECTION 2

DIAGRAMS

Location of controls
– Front View (a part) –
– Upper View (a part) –

2-1. NOTE FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM

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.
Note on Schematic Diagram:
• 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/ specified.
C : panel designation.
Note:
The components identi­fied by mark 0 or dotted line with mark 0 are criti­cal for safety. Replace only with part number specified.
U : B+ Line.
V : B– Line.
• Voltages are dc with respect to ground under no-signal conditions. no mark : Power on ( ) : Automatic power off
• Voltages are taken with a V OM (Input impedance 10 M). Voltage variations may be noted due to normal produc­tion tolerances.
• Signal path. F : AUDIO
• Abbreviation AUS : Australian model CND : Canadian model
: Impossible to measure
4
W or less unless otherwise
Note:
Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié.
Rear View (a part) –
Circuit Boards Location
MAIN board
CONTROL board
POWER TR boar
PS board
POWER SW UC board
33
SA-WM40
Ver 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.

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
1
A
IN
JK501
LINE
OUT
B
2 3 4 5 6 7 8 9 10 11 12
CONTROL BOARD
MAIN BOARD
VR501 LEVEL
31
SW501 PHASE
NORMAL REVERSE
VR502
CUT OFF FREQ
15
POWER SW UC
BOARD
11
C
TM501
SPEAKER
OUT
IN
D
L
E
R
++
++
POWER TR BOARD
1-677-925-
1313
(11)
1-677-927-
11
(11)
D512, S801
POWER
–1–2
1-677-933-
11
(11)
F
T851
RLY601
SW502
G
POWER SAVE
AUTO
OFF
PS BOARD
T801
POWER TRANSFORMER
POWER TRANSFORMER
H
(CHASSIS)
SP601
1-677-926-
I
1-677-924-
11
(11)
AC IN
11
(11)
44
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