VSX-330
Protection Circuit
5
4
3
2
1
6
D
C
A
B
D
C
A
B
5
4
3
2
1
6
R253
3
1
2
CP100
D9
R69
R
289
C
233
Q
213
R
264
71
IC2023
PROTECT2
(MAIN CPU)
HEAT SINK
NORMAL:3.3V
THERMAL DETECT:0V
(VOLUME DOWN)
D18
R70
+5
V
+5
V
+
5V
TEMP Detection Circuit
MAIN ASSY
CPU ASSY
PTC ASSY