Schematic Diagram - Bias Board - Sony STR-DB1070 - Fm Stereo/fm-am Receiver Service Manual

5-18. SCHEMATIC DIAGRAM – BIAS Board –
R540 R542
4.7k 10k
CN501
7P
+OUT
R516
6.2k
Q540
2SC4495
+OUT
R541
BIAS
1k
-OUT
-OUT C540
47
+VE 16V
SPOUT
(Page 28)
-VE
Q504,505
CURRENT DETECT
R590 R592 R565
4.7k 10k 4.7k
CN551
7P
+OUT
Q590
2SC4495
R591
BIAS R566
+OUT 1k
6.2k
C590
-OUT
47
16V
-OUT
+VE
SPOUT
(Page 28)
-VE
Q554,555
CURRENT DETECT
R490 R492
CN451 4.7k 10k
7P
+OUT
R466
Q490
6.2k
+OUT 2SC4495
BIAS
-OUT C490
R491
47
1k
-OUT 16V
+VE
SPOUT
(Page 28)
-VE
Q454,455
CURRENT DETECT
R440 R442
CN401 4.7k 10k
7P
+OUT
Q440
+OUT 2SC4495 R416
R441 6.2k
BIAS
-OUT 1k C440
47
-OUT 16V
+VE
SPOUT
(Page 28)
-VE
Q404,405
CURRENT DETECT
R640 R642 R615
4.7k 10k 4.7k
CN601
7P
+OUT
Q640
2SC4495
R641 R616
+OUT 1k BIAS 6.2k
C640
-OUT
47
16V
-OUT
+VE
SPOUT
(Page 28)
-VE
Q604,605
CURRENT DETECT
R692 R665 C663
10k 4.7k 220p
CN651
7P
+OUT
R666
Q690 6.2k
+OUT 2SC4495
BIAS
-OUT C690
47
-OUT 16V
+VE
SPOUT
(Page 28)
-VE
Q655
2SA988TP-P
Q654,655
CURRENT DETECT
(DB1070)
R515 C513 R525
4.7k 220p 47k
Q504
2SA988TP-P
R526 * R422,472,522,572,622,672
47k R527
Q506 22k
R518 2SC1815GR-
1.8k
AF POWER
PROTECTOR
R521
D506
30k
1SS133T-72
R520
15k
C515
0.01 C516
R522 10
* 50V
Q505
2SA988TP-P
D505 R524
1SS133T-72 15k
R519
68k
C563 R575
220p 47k
Q554
2SA988TP-P
R576
47k
R568
Q556
1.8k
2SC1815GR-
R577
AF POWER
22k
PROTECTOR
R571
D556
30k
1SS133T-72
R569
15k
C565 C566
R572 0.01 10
* 50V
Q555
2SA988TP-P
D555
R574
1SS133T-72
15k
R570
R475
68k
C463 47k
R465
220p
4.7k
Q454 R476
2SA988TP-P 47k
R468 Q456 R477
1.8k 2SC1815GR- 22k
AF POWER
R471
30k PROTECTOR
D456
1SS133T-72
R469
15k
C465 C466
R472 0.01 10
* 50V
Q455 D455 R474
2SA988TP-P 1SS133T-72 15k
R470 R425
68k 47k
R415 C413
4.7k 220p
Q404
2SA988TP-P R426
47k
R418
Q406
1.8k
2SC1815GR-
R427
AF POWER 22k
R421
PROTECTOR
30k D406
1SS133T-72
R419
15k
C415 C416
R422 0.01 10
Q405 * 50V
2SA988TP-P
D405 R424
1SS133T-72 15k
C613
220p
R420
R625
68k
47k
Q604
2SA988TP-P
R626
47k R627
R618
22k
1.8k Q606
2SC1815GR-
R621
AF POWER
30k
PROTECTOR
D606
1SS133T-72
R619
15k
C615
0.01 C616
Q605 R622 R624 10
2SA988TP-P 15k 50V
*
D605
1SS133T-72
R620 68k
Q654
2SA988TP-P R675
47k
R676
47k
R668
1.8k
R677
22k
R671
D656
30k
1SS133T-72
Q656
R669
2SC1815GR-
15k
C665
AF POWER
0.01
C666
R672 R674 PROTECTOR
10
15k
*
50V
D655
1SS133T-72
R670
68k
4.7k (US,CND)
3.3k (AEP,UK)
10k (E,CH)
OVER LOAD DETECTOR
* R803
22k(DB870)
R858
33k(DB1070)
470k
R801 R803
22k *
IC803(2/2)
M5128AP
R863
Q801 22k
2SA988TP-P
C806
47p
R804
10k
Q804
BA1F4M-TP D806
1SS133T-72
R857
10k
Q801,804
OVER LOAD
IC803(1/2)
DETECTOR
M5128AP
C808
CN810
47p
6P
-15V
+15V
GND
-B
PROTECTOUT
SENSOUT
D817
1SS133T-72
R807
Q802,803,805
D807 6.8k
AF POWER PROTECTOR 1SS133T-72
Q802
2SC2785TP-
C805
R819
470
10k
6.3V
Q805
2SC1841TP-
D805
1SS133T-72
C807
R805 R806
22
10k 39k
50V
Q803
2SA988TP-P
R802
1k
31 31
(Page 28)
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
STR-DB870/DB1070
Les composants identifiés par une marque 0 sont
critiques pour la sécurité. Ne les remplacer que
par une pièce portant le numéro spécifié.