Sony STR-DN840, Service Manual

Page: 47 / 100

STR-DN840
STR-DN840
47 47
5-28. SCHEMATIC DIAGRAM – STANDBY Board –
1
A
B
C
D
E
F
G
H
I
J
K
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
STANDBY BOARD
3.3
8.6
8
0.8
1
9.3
3.5
0
0.7
0.6
0
1
4
1
3
5
7
1
3
1
3
4
8
6
1
3
4
5
6
FH902
C985
0.1
C986
0.1
CL957
CL955
CL956
CN951
4P
LIVE
NEUTRAL
F901
T3.15AL 250V
(Except US, CND)
8A 125V
(US, CND)
C982
3300
16V
CN952
7P
220V/240V
TO SUB PT
AC IN AFTER PRIMARY
RY FOR MAIN PT
AC IN FOR SUB PT
120V/127V
TO SUB PT
CN953
3P
LIVE
NEUTRAL
10k
R901
10k
R900
4.7k
R902
2.2k
R903
C984
1
50V
CL953
D903
DA2J10100L
D900
D901
1SR154-400TE-25
D900 ~ D901,
D904 ~ D905
D905
D904
47k
R904
CL952
CL951
FH901
CL954
C983
0.1
0
R951
CL900
CL901
CL904
CN940
7P
POWER_Relay
AC_CUT
Stby 3.3V
Stby 3.3V
7 Stby GND
Stby GND
IC901
RT7237ALGSP
1 BOOT
2 VIN
3 SW
4 GND 5 FB
6 COMP
7 EN
8
9
SS
GND
CL905
C987 0.1
L001
10uH 75k
R952
24k
R953 C980
22
C989
3300p
C992
0.1
R954
15k
C988
22
C991
10
C981
10
R913
4.7
R914
22
D902
BAV70
1
POWER
TRANSFORMER
(SUB)
T902
RY951
5V, TV-8
Q900
2PD601ART
AC OFF DETECT
Q901
2PD601ART
RELAY DRIVER
+3.3V REG. (STBY)
IC901
E
DIGITAL
BOARD
(3/8)
CN1500
(Page 30)
DCDC
BOARD
CN901
(Page 45)
O
~ AC IN
POWER
TRANSFORMER
(MAIN)
T901
K
MAIN BOARD
(2/4)
CNP920
(Page 39)
J
MAIN BOARD
(2/4)
CNP930
(Page 39)
N
DCDC BOARD
CN941
(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.