Sony SA-WM40 Service Manual page 7

2-5. SCHEMATIC DIAGRAM (Except US, Canadian models) •
R501
10k
TM501
SPEAKER
IN OUT
R505
4.7k R504
1/2W 10k
C503
220p
L
R
R503
10k
R506
4.7k R502 C504
1/2W 10k 220p
R554 R553 R512
2.2k 2.2k 680
OUT
C502 R509
220p 47k
JK501 LINE
IN
R508 R507 C501
1k 1k 10
50V
(CHASSIS)
Q609
MN2488
C605 R612 FINAL BC603
1000p 2.7k 6P
DRIVE
R621 R623
0.39 0.39
2W 2W
R622 R624
0.39 0.39
Q607 R614
2W 2W
2SC1815 330
BIAS
R613
1k
Q610
MP1620
FINAL DRIVE
R603 D601 R608 R611
330 1SS133 22k 150
D602 R610
1SS133 100k
Q603 Q606
2SA1175 Q603,606 2SA1145
CURRENT
REGULATOR
R604
15k
C618
4p
Q601 Q602
2SA1174 2SA1174
C603 R605
Q601,602
2200p 180
PRE DRIVE
R609
1k
Q604 Q605
2SC2785 2SC2785
Q604,605
CURRENT MIRROR
C608
C601 R602 R606 R607
0.12 47k 180 180
10V
See page 3 for Note on Schematic Diagram.
(2/2)
LIMITER AMP
3 8
2
(1/2)
1
MIX AMP
IC501(2/2)
4558
IC501(1/2)
4558
5
C505 R513 R514
7 C519
220p 6.8k 39k
6
50V
4
R547
15k
R511
5 8
C506 68k
0.01
6
7
IC502(2/2)
R549
4558
33k
C507 (2/2)
0.01
BUFFER
R548 R537
22k 10k
IC502(1/2)
4558
R510
3
39k C524
1
2
25V
4
R539
1k
(1/2)
LINE AMP
CN603
6P
R616
10
R653
22k
R650
10k
IC507(1/2) R651
4558 10k
4 2
3
1
R601 R643
C602
4.7k 10k
1
R618
50V
47k
C619 R642 R663
0.1 680 1k
BUFFER
C604 R647
5 8
100p 15k
6
7
R649 R652
R644 R646 4.7k 16k
IC507(2/2)
Q608 2k 10k
4558
2SC2705
CURRENT
R617
REGULATOR 10 R648
2.2k
R640 C621
0.39 2W 0.047
R615
47
47
C620 R645 R641 R662
1000p 1.8k 0.39 2W 2.7k
R625 C611
10 1/2W 0.047
BASS BOOST AMP
IC503(1/2)
4558
VR501 3
20K 1
2
LEVEL
4
2
R516 R515
3
1 C508 10k 10k
10
50V
SW501
PHASE
BC501 REVERSE
CN501
5P
5P C509
10
0.27
NORMAL
C510
0.27
C515
10
50V
C517 R518
0.01 5.6k
HIGH-PASS FILTER
R517 R519
10k 56k
C516
C518
10
0.01
50V
D510 R540 R545
1SS133T 220k
5 8
22
6
7 Q504
R541 R543
2SA1175
1M 100k
IC505(2/2)
POWER SAVE
4558
SWITCH
S502
R538 Q503
POWER SAVE
470k DTC124ES
C525
OFF
AUDIO SIGNAL 220
16V
DETECT
(2/2)
AUTO
LEVEL SHIFT
R542 R546
100k
D801
1N5402
C802 C801
6800 6800
D802
71V 71V
1N5402
D803
1N5402
D804
1N5402
D817
1SR139
Q801 D818
2SC1815 1SR139
+12V REGULATOR
C809
R803
10
2.2k D819
35V
1SR139
C807 C803
D821
10 220
MTZJ138
35V 25
Q802 D820
2SA1015 1SR139
-12V REGULATOR
C810
R804
10
2.2k
35V
C808 C804
D822
10 220
MTZJ138
35V 25V
R655 R654 R660
100k 56k 12k
Q613,614
OVER LOAD
DETECT
R656
100k
Q611
Q612
2SC2785
Q614 2SC2784
DTC124ES POWER ON
RELAY
Q613
MUTING
2SC2785 DRIVE
C615 C617 C616
R657
220 100 4.7
22k
6.3V 35V 25V
7 7
(1/2) (1/2)
BUFFER
5
IC508(1/2)
7
4558
6 5
7
IC504(1/2) 6
R521
4 4558
15k
4
C511
0.39
LOW-PASS
FILTER
R520 R522
15k 6.8k
5 8 3 8
6 2
R523
7 1
6.8k
IC503(2/2) IC504(2/2)
C514 R528
4558 4558
0.82 10k
C513 R526 R529
0.033 1k 10k
(2/2)
R530
10k
R531
10k
10k
(1/2) BC503 BC551 D553
3P 3P 1SS133T
COMPARATOR
R544
1M
IC505(1/2)
4558
3
1 Q557
2 DTA124ES
R555 LED DRIVE
4
22k
Q505 (GREEN)
DTC124
RELAY DRIVE,
10k
LED COLOR
SELECT
F801
RLY801
CN804 BC804 T1AL
2P 2P 250V
D810
1SS133T
C851
0.01
250V
T801
CN801 BC801
POWER TRANSFORMER
3P 3P
C812
0.047
C811
0.047
T851
BC803 CN803
POWER TRANSFORMER
3P 3P
D606
1SS133T
R659
1.8k
2W
BC602
2P
SP601
RLY601
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
SA-WM40
Ver 1.2
VR502
OUT OFF FREQ
VR502
20K IC508(2/2)
R527 R556 R557
4558
100 4.7k 4.7k
2 1 3 8
2
3 4 5 1
R525
15k
C526 C527 (2/2)
0.22 0.1
FILTER AMP
R532 D507 R533 D508
10k 1SS133T 10k 1SS133T
3 8
2
1
FILTER AMP
IC506(1/2)
4558 IC506(2/2)
4558
5
7
6
4
R561
2.2k
Q558
DTA124ES
LED DRIVE
(RED)
D552
SML7242CTH8F
POWER
R560 R562
1k 2.2k
BC806 BC851
2P 2P
C852 S851
0.01
POWER
250V
BC802
2P
AC IN
Les composants identifiés par une marque 0 sont
critiques pour la sécurité. Ne les remplacer que
par une pièce portant le numéro spécifié.