Schematic Diagram - Standby Board - Sony STR-DN840 Service Manual

5-28. SCHEMATIC DIAGRAM – STANDBY Board –
1 2 3
A
STANDBY BOARD
B
DIGITAL
BOARD
CN940
(3/8)
C
7P
CN1500 CL900
POWER_Relay 1
CL901
E
(Page 30) AC_CUT 3
Stby 3.3V 4
CL904
Stby 3.3V 5
O
Stby GND 6 CL905
DCDC
Stby GND 7
BOARD
C980
22
D
CN901
(Page 45)
E
F
G
H
I
J
K
STR-DN840
4 5 6
R903
2.2k
0.7
R904
47k
IC901
RT7237ALGSP
R952
L001
75k
10uH
0.8
5 FB GND 4
C987 0.1
1 3.3
6 COMP SW 3
9.3 8.6
7 EN VIN 2
C989
3.5 8
3300p
8 SS BOOT 1
C988 R953
22 24k
GND
C991 C981
R954 C992
10 10 C982
9
15k 0.1
3300
16V
IC901
+3.3V REG. (STBY)
0
Q900
C984
2PD601ART
0.6 1
AC OFF DETECT
50V
R900
10k
7 8 9 10
FH902
F901
R913 R914
T3.15AL 250V
4.7 22
(Except US, CND)
8A 125V
FH901
(US, CND)
0
Q901
2PD601ART
RELAY DRIVER
D903
1
RY951
DA2J10100L
5V, TV-8
T902
POWER
TRANSFORMER
R951
D900 ~ D901,
(SUB)
0
D904 ~ D905
1SR154-400TE-25
4
D901
6 3
C985
D900
C983 D905 0.1
0.1 D904
8 1
C986
0.1
R901
10k
D902
BAV70
R902
4.7k
47 47
11 12 13
CN951
4P MAIN BOARD
CL951
1 LIVE
CL952
4 NEUTRAL K
CNP920
CN952
7P (Page 39)
CL953
220V/240V
1
TO SUB PT
CL954
AC IN AFTER PRIMARY
3
RY FOR MAIN PT
CL955
5 AC IN FOR SUB PT
CL956
120V/127V
MAIN BOARD
7
TO SUB PT
J
T901
CN953
CNP930
POWER
3P
CL957 TRANSFORMER
(Page 39)
1 LIVE
(MAIN)
~ AC IN
3 NEUTRAL
DCDC BOARD
N
(Page 45)
Note: IC901 on the STANDBY board cannot exchange with
single. When this part on the STANDBY board is damaged,
exchange the entire mounted board.
STR-DN840
14 15 16 17
(2/4)
(2/4)
CN941