Schematic Diagram − Main Board (3/3) - Sony STR-DB798 Service Manual

6-26. SCHEMATIC DIAGRAM – MAIN BOARD (3/3) –
(3/3)
R636
4.7k
C632
220p
B1
B2
Q633
B3
2SA1038S
CURRENT
DETECT
R637
B4
1.8k
Q5
B7
R736
4.7k
C732
220p
Q733
2SA1038S
CURRENT
DETECT
R737
1.8k
Q3
R486
4.7k
C482
220p
(Page 37)
Q483
2SA1038S
CURRENT
DETECT
R487
1.8k
Q6
B6
B5
B8
R436
4.7k
C432
220p
Q433
2SA1038S
CURRENT
DETECT
R437
1.8k
Q7
STR-DB798
R632
2.2k
Q634
2SA1115
Q602
BIAS R612
MN2488
100
Q631
BOOSTER
2SC3623A
RV631 BIAS
220
C631
R631
47 R614
470
25V 0.22X2
5W
R635
6.2k
Q603
R613
MP1620
100
BOOSTER
R732
2.2k
Q734
2SA1115
Q702
BIAS R712
MN2488
100
Q731
BOOSTER
2SC3623A
RV731 BIAS
220
C731
R731
47 R714
470
25V 0.22X2
5W
Q703
R735 MP1620
6.2k
BOOSTER
R713
100
R482
2.2k
Q484
2SA1115
Q452
BIAS R462
MN2488
100
Q481
BOOSTER
2SC3623A
RV481 BIAS
220
C481
R481
47 R464
470
25V 0.22X2
5W
R485
6.2k
Q453
MP1620
R463
BOOSTER
100
R432
2.2k
Q434
2SA1115
Q402
BIAS R412
MN2488
100
Q431
BOOSTER
2SC3623A
RV431 BIAS
220
C431
R431
47 R414
470
25V 0.22X2
5W
Q403
R435 MP1620
6.2k
BOOSTER
R413
100
CN632
2P
(FOR ADJUSTMENT)
CN601
12P
GND
BIAS+
BIAS-
NF
GND
L
R586
GND (Page 42)
4.7k
BIAS+
C582
BIAS-
220p
R582
NF
2.2k
GND
Q584
2SA1115
SBL
BIAS
Q583
RV581
2SA1038S Q581
220
2SC3623A
CURRENT
BIAS
DETECT
R581
470
CN732
2P
(FOR ADJUSTMENT)
R587
1.8k
Q1
R585
6.2k
R563
100
R536
4.7k
C532 R532
220p 2.2k
Q534
2SA1115
BIAS
CN482 Q533 Q531
2P 2SA1038S 2SC3623A
RV531
CURRENT 220 BIAS
(FOR ADJUSTMENT)
DETECT R531
470
R537
1.8k
Q2
R535
6.2k
CN401
12P
R513
BIAS+ 100
BIAS-
NF
R686
GND
4.7k
R682
R
2.2k
C682
GND
220p
BIAS+
BIAS-
Q684
2SA1115
NF
BIAS
GND (Page 42)
Q683 Q681
2SA1038S 2SC3623A
C RV681
CURRENT 220 BIAS
DETECT R681
470
R687 R685
1.8k 6.2k
Q4
CN432
2P
(FOR ADJUSTMENT) R663
100
CN421
6P
(Page 42)
GND
GND
GND
+B
-B
LIMITER
(Page 38)
39 39
R562
100
Q552
MN2488
BOOSTER
C581
47 R564
25V 0.22X2
5W
Q553
MP1620
BOOSTER
R512
Q502
100
MN2488
BOOSTER
C531
47
25V
R514
0.22X2
5W
Q503
MP1620
BOOSTER
Q652
R662
MN2488
100
BOOSTER
C681
47
25V
R664
0.22X2
5W
Q653
MP1620
BOOSTER
C404
22
100V
C403
22
100V
STR-DB798
CN418
3P
AC 6V
GND
AC 6V
(Page 51)
CNP419
3P
AC 6V
GND
AC 6V
(Page 25)
CN582
2P
(FOR ADJUSTMENT)
CN501
12P
BIAS+
BIAS-
NF
GND
SR
GND
BIAS+
BIAS-
NF
GND
(Page 42)
SL
GND
CN532
2P
(FOR ADJUSTMENT)
CN651
10P
GND
BIAS+
BIAS-
NF
GND
SBR
A-CL GND
SBL
(Page 42)
GND
SHORT
CN682
2P
(FOR ADJUSTMENT)
CN488
6P
(Page 43)
CN415
3P
+B
GND
-B
(Page 49)