Sony STR-DB780 Service Manual

STR-DA1ES/DB780
3535
5-22. SCHEMATIC DIAGRAM – BIAS Board –
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque 0 sont
critiques pour la sécurité. Ne les remplacer que
par une pièce portant le numéro spécifié.
Q432
R532 R534
R533
Q531
C531
R537
Q533
R535
C532R536
Q532
R539
D531
R541
R542
C534
D532
C533
R544
R543
R545
Q534
R584
R583
Q581
C581
C582R586
R585
CN531
CN581
CN481
Q582
Q583
R587
D581
R589
R592
C583 D582
R591
C584
R594
R595
R538
R588
R593
R489
D481
R486 C482
R493
R494
R495
R492
C484
C483 D482
R491
R488
CN431
Q483
Q482
R487R485
C481
R483
R482 R484
Q491
R432 R434
R433
Q431
C431
R436 C432
R439
D431
R441
C433
R442
C434
R443
R445
R444
R438 R643
R644
R645
D632C633
R641
R642
C634
D631
R639
R637R635
Q633
Q632
C631
Q631
R634 R636 C632
R633
CN631
R638
C805
D805
Q802
D817
D807
D808
R805 R806
C807
R807
Q805
R811
D806
R810
R801 R803
C806
C808
CN810
JW800
R804
R435 R437
Q433
R540
R590
Q584
Q484
Q434
Q634
R640
R440
R490
IC803
R802
Q803D432
Q804
R582
R632
2SA988
4.7k 10k
1k
2SC4495
47
16V
1.8k
2SA988
6.2k
220p4.7k
2SA988
15k
1SS133T-72
22k
15k
10
50V
1SS133T-72
0.01
47k
47k
22k
2SC1815
10k
1k
2SC4495
47
16V
220p4.7k
6.2k
7P
7P
7P
2SA988
2SA988
1.8k
1SS133
15k
15k
0.01 1SS133
22k
10
50V
47k
22k
68k
68k
47k
15k
1SS133
4.7k 220p
47k
47k
22k
15k
10
50V
0.01 1SS133
22k
68k
7P
2SA988
2SA988
1.8k6.2k
47
16V
1k
4.7k 10k
2SC4495
4.7k 10k
1k
2SC4495
47
16V
4.7k 220p
15k
1SS133
22k
0.01
15k
10
50V
47k
22k
47k
68k 47k
47k
22k
1SS1330.01
22k
15k
10
50V
1SS133
15k
1.8k6.2k
2SA988
2SA988
47
16V
2SC4495
10k 4.7k 220p
1k
7P
68k
470
6.3V
1SS133
2SC2785
1SS133
1SS133
1SS133
10k 22k
22
50V
10k
2SC1841
470k
1SS133
10k
22k 33k
47p
47p
6P
10k
6.2k 1.8k
2SA988
2SC1815
2SC1815
2SC1815
2SC1815
M5218AP
1k
2SA9881SS133
BA1F4M
4.7k
4.7k
*
∗
∗
∗
∗
-B
GND
+15V
ADD
COMP
-15V
LIMITER
BIAS+
BIAS+
BIAS-
BIAS-
+PTrE
-PTrE
SPOUT
BIAS+
BIAS+
BIAS-
BIAS-
+PTrE
-PTrE
SPOUT
BIAS+
BIAS+
BIAS-
BIAS-
+PTrE
-PTrE
SPOUT
BIAS+
BIAS+
BIAS-
BIAS-
+PTrE
-PTrE
SPOUT
BIAS+
BIAS+
BIAS-
BIAS-
+PTrE
-PTrE
SPOUT
BIAS
AF POWER
SENSOR
DETECT
BIAS
DETECT
SENSOR
AF POWER
Q582,583
Q532,533
SENSOR
AF POWER
BIAS
SENSOR
AF POWER
DETECT
BIAS
SENSOR
AF POWER
DETECT
BIAS
DETECT
Q482,483
CURRENT
CURRENT
CURRENT
CURRENT
CURRENT
Q632,633
∗
Q432,433
OVER LOAD
DETECTOR
AF POWER
Q802,803,805
PROTECTOR
PROTECT
OVER LOAD
DETECTOR
VEE
VCC
(DB780)
(DA1ES)
R440,490,540,590,640
1.8k
2k
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Sony STR-DB780 Specifications

General

Type	Stereo Receiver
Total Harmonic Distortion	0.09 %
Digital inputs	2 Optical, 1 Coaxial
Weight	10.5 kg
Video inputs	composite
Video outputs	1 composite, 1 S-Video
Output Power	100 Watts (8 Ohms, 20 Hz - 20 kHz, 0.09% THD)
Signal-to-Noise Ratio	96 dB (Line in)
Input Sensitivity	150 mV (Line in)