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

STR-K990
4-14. SCHEMATIC DIAGRAM – MAIN BOARD (4/4) –
MAIN BOARD
SUBWOOFER AUDIO OUT
J309
1P
CN505
4P
VIDEO
+15V 1
BOARD
O
GND 3
CNP203
-15V 4
(Page 36)
CNP913
9P
PROTECTOR 1
FRONT A RY 3
DIGITAL
SB/CTR/REAR RY 4
BOARD
HP CTRL 5
D
(4/5)
HP RY 6
CNP503
WOOFER RY 7
(Page 22)
FRONT B RY 8
BRIDGEABLE RY 9
CN506
4P
DCAC
+7V 1
BOARD
L
GND 3
CN2000
-7V 4
(1pin to 4pin)
(Page 34)
CNP507
4P
1
DISPLAY BOARD
(Page 30)
STR-K990
MAIN BOARD
(1/4)
3
(Page 25)
2 1 31 32
(4/4)
C471
4.7
50V
R469 R468
1k
100k
R470
47k
RY560
D560
C400
1SS355WTE-17
Q560
2200p C807
2SC3052EF-T1-LEF 47
RELAY DRIVE 25V
0
0.8
C808
47
25V
R802 R533
220 47k
1SR154-400TE-25
R532
10k
R910
D808
0.15
1SR154-400TE-25 1/2W
C822
R806
47
35V
C831
D805
0.47
1SR154-400TE-25
50V
D806
1SR154-400TE-25 C830
0.47
C832
50V
3300 D807
16V
1SR154-400TE-25
CNP912
2 3 4 3 2 1
3P
M B
DIGITAL BOARD
CN108 (4/5)
CNP505 (6,7pin)
(Page 22)
MAIN BOARD
5
(3/4)
(Page 27)
36 34 33 35
IC801
+7V REG
IC801
TA7807S
7 17
2 O I 1
G
C811
3
0.47
C810
1
0.47
-7 -16.5
G
2 O 3
I
D896
IC802
TA79007S
IC802
-7V REG
61
66
68
55
62
64
D802
D6SBN20-7003
69
C803
6800
71V
Q801
2SB734-T-34
C804
-20V REG
6800
71V
-21.9 -46
R803
R804 R830
4.7
10k 82
-22.5
WP102
C802 C809
C801
47
47 0.1
22k 35V
35V 100V
WP101
SYSTEM
GND
CN915
5P
5 4 3 2 1
N
STANDBY BOARD
CNP802
(Page 32)
28 28
37 38
5 R1 (SIDE1)
4 R2 (SIDE2)
3
GND
2 R2 (SIDE2)
1 R1 (SIDE1)
CNP801
5P
R824
C805
2.2k
RY801
0.22
100V
C806
0.22
D818
100V
1SS355WTE-17
0.2
0.8
Q809
2SC3052EF-T1-LEF
RELAY DRIVE
CNP802
6P
6
+R4
5 -R4
4 F2
3 GND
2
NC
1
F1
No mark:FM
POWER
TRANSFORMER
J
T901
(Page 32)
POWER
TRANSFORMER
K
T901
(Page 32)