Schematic Diagram - Main Board (3/4) - Sony STR-K990 Service Manual

Q Q
4-13. SCHEMATIC DIAGRAM – MAIN BOARD (3/4) –
3 7 6 3 1 5 1 5 0
MAIN BOARD (3/4)
IC501
UPC2581V-S
1 2 3 4 5
R741
22k
C741
2.2 JW501 JW502
100V
5
C501
C507 R502
4.7 100p 68k
50V
8
R501
1k
2
MAIN
BOARD
6.5
(1/4)
Q692
(Page 25)
DTA124ESA-TP
-B SWITCH
6.5
T E
L 1 3 9 4 2 2 9 6 5 1 3
R698
10k
Q691
2SC1815GR-TPE2
-B SWITCH
R691 -46
-45.3
R692
-46
330
3
4
12
31 32
w w w
STR-K990
• See page 41 for IC Block Diagram.
15 14 16 17 18 19
IC501
IC B/D
POWER AMP
6 7 8 9 10 11 12 13 14 15
C505
C506 +V_C
100p 33p
500V
-V_C
C503 R503 C504
2.2k 3p
100 VEE
R505
10V 500V
68k
C733 C732
R733 10 10 R732
1 100V 100V 1
D691
1SS355WTE-17
R696 47k
C691 R695
10k
0.1
R690
-5.5 220k
D690
UDZSTE-1730B 8 7 6 5
IC691
NJM4565M(TE2)
R693
IC691
10k
PROTECT DET
1 2 3 4
R699
470k
R694
10k
33 35
34
x a o
y
. i
http://www.xiaoyu163.com
20
BOOSTER
C517 Q503 MN2488-OPY-MK
R514 47p
33
500V
0.1
B
R511
R510
Q501 2.2k 82k 46
2SA1115TP-EF C
1.2
LIMITER
0.5 0.1
E
Q505
2SA1163L-TE85L
-1
Q502 CURRENT DETECT
R517
2SC3623ATP-LK
10
0.5 R520 C519 0.1
LIMITER 220p
4.7k
-0.5 R516 0.22 -0.1
C510
47
C511
25V
0.022
-0.1
-1 R513
560
R521
R573
R522
6.2k
1.5k 47k
-1
E
R524
15k
-46
R515
C
33 -0.1
-0.1 0
B
C516
47p
Q504 MP1620-OPY-MK -46
500V
R525
68k
Q Q
3 7 6
MAIN BOARD
5
(4/4)
(Page 28)
u 1 6 3
27 27
http://www.xiaoyu163.com
2 4
8 9 9
MAIN BOARD
(2/4)
4
(Page 26)
21 22 23 24
D841
UDZSTE-173.0B
R843
0
C842
R840
6.8k 47
25V
R844
22k
R555 4.7k
R518 L501
R529 R556 47k
1.7uH C529 D529
4.7 10k
0.01
R539 1SS355WTE-17
100k
D540
6.5
C541
R540
1SS355WTE-17
0.01
22k 0
C540
R546
R557
10
15k 15k
50V
D505 Q540
1SS355WTE-17 2SC3052EF-T1-LEF
AF POWER
PROTECT
Q506
2SA1163L-TE85L
CURRENT DETECT
3 1 5 1 5 0 8 9 2
R585
4.7k
R586
47k
VACS-CTRL
m
c o
.
STR-K990
2
8 9 9
18
25 27 26 28 29 30
R635
82
RY610
D611
1SS355WTE-17
TM604
2P
TM604
C 4
0.3 –
R633
0.8 1k 68
3
SPEAKERS
CENTER (INPEDANCE USE
2
6-16 Ω )
C 1
+
Q612
2SC3052EF-T1-LEF
RELAY DRIVE
4 9 8 2 9 9
No mark:FM
36 37 38