Schematic Diagram - Main Board (2/4) - Sony STR-K990 Service Manual

STR-K990
Q Q
4-12. SCHEMATIC DIAGRAM – MAIN BOARD (2/4) –
3 7 6 3 1 5 1 5 0
1 2 3 4
MAIN BOARD (2/4)
A
IC701
IC B/D
POWER AMP
IC701
UPC2581V-S
1 2 3 4 5 6 7 8
B
R744
C701 C744 C755 C756 C706
4.7 22k 33p 100p 100p
2.2
50V R701 500V
100V
1k
6
C707 R702
100p 68k
C751
C754
4.7 C757 R752
3p
C R751 100p 68k
50V 500V
1k
7
R754
R753
68k R703
2.2k 2.2k
C753 C703
100
100
10V 10V
D
1
MAIN
IC601
BOARD
POWER AMP
(1/4)
(Page 25)
E
IC601
UPC2581V-S
1 2 3 4 5 6 7 8
C651 R743
C743 C605 C606 C656
4.7 22k
2.2 33p 100p 100p
R651
50V 500V
1k 100V
9
F
C657
R652
100p 68k
50V
C601
C607
50V R602 C604
100p
68k 3p
4.7
50V
500V
10 T E
L 1 3 9 4 2 2 9 6 5 1 3
R601
1k
R604
R603 68k R653
2.2k 2.2k
G
C653
C603
100 100
10V 10V
H
I
J
14
K
w w w
STR-K990
• See page 41 for IC Block Diagrams.
5 6 7 8 9
Q701 C717
R714 47p
2SA1115TP-EF
33 500V
LIMITER 0.1
1.2 R710 R711
46
2.2k 82k
0.5
1.2
Q702
R716 0.22
-1 2SC3623ATP-LK
9 10 11 12 13 14 15
0.5 LIMITER
0
C710
47
-1 R713
25V
C705 560
+V_L
33p
500V
-1
-V_L
R715
33 -46
-0.1
C704
3p
500V
C716
47p
R704 500V
68k
Q652
C669
R665
2SC3623ATP-LK 47p
33
LIMITER 500V -0.1
-1 R663
-46
560
-0.1
C660
0.1
47
25V 0.6
-V_R
-1
R671
R666 0.22
6.2k
+V_R 0.6
R661
R660
2.2k 82k
0.2
IC B/D
Q651
R664
2SA1115TP-EF 33
LIMITER
9 10 11 12 13 14 15 C666
47p
500V
Q601 C621
2SA1115TP-EF R614 47p
33
LIMITER 500V
C655 +V_SL
33p
500V
-V_SL
R610
1.2 R611
2.2k 82k
0.5
-1
C654 C610 0.5
3p R616 0.22
47
500V 25V -0.6
R654 68k
R613
560
-1
R615
Q602 33
2SC3623ATP-LK
LIMITER
-V_SR
C620
47p
+V_SR 500V
Q752
C767
2SC3623ATP-LK
47p
LIMITER 500V
R765
-1 R763
33
560
C760
-0.5
47
25V
0.5
-1
0.5
R766 0.22
R760 R761
2.2k 82k
1.1
Q751
R764
2SA1115TP-EF
33
LIMITER
C766
47p
500V
15 16 17 18 19
x a o
. i
http://www.xiaoyu163.com
10 11 12 13
BOOSTER
Q703 MN2488-OPY-MK
R719 C720
220p
4.7k 1.2 6.5
R740 C742
B
0.01
Q705 22k
0.1 0
2SA1163L-TE85L AF POWER PROTECT
Q740
C CURRENT DETECT
D740
2SC3052EF-T1-LEF
1SS355WTE-17
0 C740
R748 R747
D705 10
R722 15k AF POWER
E 15k
1.5k R724 50V
1SS355WTE-17 PROTECT
R721 15k
6.2k
JL001
L701 1.7uH
R718 4.7
0 C711
R739
0.022
100k
Q704 MP1620-OPY-MK 0
R729
C729 D729
Q706 R717 10k
0.01
E 2SA1163L-TE85L 1SS355WTE-17
-45 10 25V
R725
CURRENT DETECT
68k
C
Q655 R638 R667
B
68k 10 R723
2SA1163L-TE85L 47k
-46
CURRENT DETECT
0.1
C661
0.022
Q654
MP1620-OPY-MK
-1.3
B
R673
AF POWER PROTECT
47k
C Q640
2SC3052EF-T1-LEF
Q656
D640
2SA1163L-TE85L C642
E R640
0.01 1SS355WTE-17
22k
0
CURRENT DETECT -0.1
0.1 D665 C640
R648 R677
R674
1SS355WTE-17 15k 15k 10
15k 50V
R669 C670
4.7k 220p
0.1 R668 4.7
1.2 L651
R623
1.7uH
E 47k
R620 C619 1.2
46 4.7k 220p
C 0
AF POWER PROTECT
0.1
R621 Q680
B 6.2k Q605
0.3 2SC3052EF-T1-LEF
2SA1163L-TE85L
R622
1.5k
CURRENT DETECT
Q653 MN2488-OPY-MK
D680
R680
1SS355WTE-17
22k 0
Q603 MN2488-OPY-MK
0.1
C681 C680
R681 R657
B 0.01
R624 15k 15k 10
15k 50V
46
C D605
L601 1SS355WTE-17
1.2 SR-CH 1.7uH
E
Q606
2SA1163L-TE85L
R618
Q Q 4.7
CURRENT DETECT 0.1
3 7 6
-1
C611
R617
0 0.022
Q604 MP1620-OPY-MK 10
R625
-1 68k
E
-46
C R
L751
-0.1
Q755 R775 1.7uH
AF POWER PROTECT
B
2SA1163L-TE85L 68k
Q750
CURRENT DETECT
-45 2SC3052EF-T1-LEF
R768
4.7
Q754 MP1620-OPY-MK 0.1 D750
C752
R750 1SS355WTE-17
0.01
-0.1 22k 0
B
-1.2
D765
R758 R757 C750
-46 R778 1SS355WTE-17 15k 15k 10
15k 50V
C
C749
-1 Q756
R772 R759
E 0.01
R749 100k
2SA1163L-TE85L 1.5k 25V
10k
CURRENT DETECT -0.7
R771
6.2k
0
1SS355WTE-17
R773
47k
C770
R769
4.7k 220p
0.1
C761 R767
0.022 10
0.1
E
46
C
-0.2
B
Q753 MN2488-OPY-MK
BOOSTER
MAIN BOARD
(3/4)
4
(Page 27)
u 1 6 3
y
26 26
http://www.xiaoyu163.com
2 4
8 9 9
14 15 16 17 18
R794
680
R792
680
RY701
R746 R745
47k 4.7k
D710
Q710
1SS355TE-17
2SC3052EF-T1-LEF
RELAY DRIVE
0.2
R734
0.8
82
R731
2.2k
Q793
2SC3052EF-T1-LEF
PROTECT SW
C791
-46 3.3
220
4.7k
R675 0.1 10V 0.1
Q795
R676 47k 2SA1163L-TE85L
R790
PROTECT SW 100k
6.5
Q723
R770
100k 2SC3052EF-T1-LEF
PROTECT SW
Q725
2SA1163L-TE85L 0.1 C721 0.1
220
PROTECT SW 10V
-46 3.3
D733
R780
10k R735 1SS355WTE-17
6.8k
D732
D722
3.3
1SS355WTE-17
R655 1SS355WTE-17
Q722
4.7k -45.7
2SC3052EF-T1-LEF
PROTECT SW
D721 R737 C722
R656 1SS355WTE-17 10
39k -46
47k 50V
6.5
R736
1k
R634
RY601
82
D610
0.2
R631
3 1 5 1SS355WTE-17 1 5 0 8 9
1k
0.8 68
Q610
2SC3052EF-T1-LEF
RELAY DRIVE
R755
4.7k
47k
R756
6.5
R738 RY710
82
D701
16.5
1SS355WTE-17
R632
2.2k
0.2 64
Q611
2SC3052EF-T1-LEF
RELAY DRIVE
D749
21 22 23 20 24 25 26 27 28
m
c o
.
2
8 9 9
19 20 21
CN792
5P
55
1 HPHONE DET
3 R-CH
I
62 4 GND
HEADPHONE
5 L-CH
R791
BOARD
2.2k
CNP790
66
(Page 36)
0.8
RY791
D791
0.2
1SS355WTE-17
Q790
R793
2SC3052EF-T1-LEF
82
RELAY DRIVE
61
TB001
8P
R(+) L(+)
+ +
FRONT L FRONT
R
L(-)
A R(-) A
– –
SR(+) + + SL(+)
2 4 9 8 2 9 9
SURROUND R L SURROUND
SR(-) SL(-)
– –
SPEAKERS
(IMPEDANCE USE6-16 Ω )
TM602
+
L
–
FRONT B
+
R
–
No mark:FM
29 30