Pioneer SC-71 Service Manual page 38

1
Amplifier Power Supply Failure Detection
O
A
D-AMP_SS ASSY
V+64V
B
GND_B
V-64V
C
J
DISPLAY ASSY
CN6001
-31
24
UCOM
D
IC6111
E
F
38
1
2
OVP&UVP
DETECT CIRCUIT
R5019
+BERR2
2125
100
R5020
+BERR1
2125
100
-BERR2
2125
R5108
100
R5109
-BERR1
2125
100
F
CN7903 CN7902 CN7002
-2
-9 -2
R
V-REG_SS
ASSY
2
3
CN4000
1-4
XBERR
INTERFACE_SS ASSY
R7100
Q7024 2125
1k
2SA1576A(QRS)
R7107
2125
NM
R7106
Q7022
2125
100 OVP DETECT
2SA1576A(QRS)
Q7025
UVP DETECT
2SC4081(QRS)
R7098
R7104
2125 2125
22k 22k
Q7023
2SC4081(QRS)
GNDD
R7122
2125
NM Q7028
2SC4081(QRS)
Q7029 R7118
2SC4081(QRS) 2125
1k
SC-71
3
4
V+12_DF
R7123 OVP&UVP
2125
DETECT CIRCUIT
10
Q7020
2SC4081(QRS)
R7089
2125
470
R7094
2125
1k
Q7021
2SC4081(QRS)
R7090
2125
470
R7109
2125
470
Q7026
2SA1576A(QRS)
R7114 R7110
2125 2125
1k
470
Q7027
2SA1576A(QRS)
-BERR1
R7124
-BERR2
2125
+BERR1
10
+BERR2
V-12_DF
4
CN7003
18-21