Schematic Diagram - Main Board (3/3) - Sony STR-KS500 Service Manual

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3 7 6 3 1 5 1 5 0
2-8. SCHEMATIC DIAGRAM – MAIN Board (3/3) –
AUDIO -
CHASSIS GND
+7V
AUDIO +
(Page 9)
A1
A2
A3
A4
A5
A6
A7
A8
A9
(Page 10)
A10
A11
A12
A13
A14
A15
CNP861
3P
M1
(FAN)
CNS822
21P
T E
L 1 3 9 4 2 2 9 6 5 1 3
FRONT SP RELAY
CENTER SP RELAY
REAR SP RELAY
LEVEL_DETECT
F_CTRL2
F_CTRL1
PROTECTOR
+V
F_CLK
GND
GND
GND
(Page 8)
POW_MUTE
-30V
STANBY+V
F2
DIGITAL+V
F1
STOP
POWER RELAY
HIGH SPEED DETECT
CN820
4P
STANDBY
BOARD
CNP903
(Refer to page 19
on service manual)
w w w
STR-KS500
(3/3)
C801
0.22 D809
2 D5SBA20
1 4
C802
C818 3 0.22
4700
50V
C819
D812 R832
4700
UDZSTE 22k
50V
-1730B
R831
220
D811
1SR154-400
Q861
2SB734
FAN MOTOR ON/OFF SWITCH
R886
100
F.RY
C.RY
S.RY
Q863
R885 DTA124EKA
100
Q866
DTA124EKA
LEVEL SHIFT
F2
R557 R555 R553 D550
220k 4.7k 10k 1SS355WTE-17
F1
C561
4.7
50V
Q550
2SC3052
R558 R556 R552
C562
100k 68k R554 3.3k
1
820
50V
Q550,551
FAN MOTOR LEVEL DETECT
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C820
D810 R791 R741
100
1SR154-400 4.7 4.7
50V
R664 R643 C741
4.7 4.7 0.01
D813 C664 C643 C791
UDZSTE-176.8B 0.01 0.01 0.01
R882
R881 3.3k
1.5k
R864
Q867
47k
DTA124EKA
Q Q
3 7 6
D820
UDZSTE-175.6B
R884
47k
Q862
DTA124EKA
Q868
DTA124EKA
C871
100
16V
R883
2.2k
Q862,863 Q867,868
FAN MOTOR CONTROL SWITCH FAN MOTOR CONTROL SWITCH
Q551
2SC3052 C565
100
16V D806
1SR154-400
C563
1 R551 C564 C817
50V 100k 4.7 3300 D805 C815
50V 16V 1SR154-400 0.1
D808 C816
1SR154-400 0.1
D807
1SR154-400
u 1 6 3
11 11
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2 4
8 9 9
C813
C811
D801 0.001 R810
1000
D802 1SR154-400 0.47
25V
1SR154-400 1/2W
D803 D804
C812
1SR154-400 1SR154-400
1000
25V
C814
0.001
C821 R811
220 0.47
35V 1/2W
3 1 5 1 5 0 8 9 2
C744
390p
C794
330p
C694
330p
C844
330p
R910
0.47
F1
F2
m
c o
.
STR-KS500
2
8 9 9
TM500
SPEAKERS
CNP801
3P
FRONT SURROUND
+B T901
MAIN POWER
TRANSFORMER
-B
(Refer to page 19
on service manual) L L
R R
CNP804
3P
+R2 T901
MAIN POWER
TRANSFORMER
-R2
(Refer to page 19
on service manual)
4 9 8 2 9 9
CN700
4P
C
SPEAKER
GND
BOARD
SW CN701
(Refer to page 19
GND
on service manual)
(CHASSIS)
CNP802
5P
+R4
+R3 T901
MAIN POWER
TRANSFORMER
-R3
(Refer to page 19
on service manual)
-R4