Pioneer PDP-505HD Service Manual page 86

1
PDP-505HD
Protection Circuits
MAIN POWER ASSY
A
X DRIVE ASSY
+12V OCP
R3438
R3437 R3439
5.6k 5.6k
C3424
B
Q3405
Q3406
D3408
UCOM ASSY
C
+3.3V OVP
D
86
1
2
+B OVP
VF OVP +8V UVP
VADR UVP
+3.3V UVP
2
3
AC200V P.D.
+12V UVP
VADR VSUS UVP
OVP
+5V OVP
+5V UVP
3
4
+14V
–8V UVP +14V
UVP OVP
VSUS OVP
DRIVE STOP
4