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24
(8)
Troubleshooting guide of power supply board
a. No power supply
b. No DC voltage output
Does AC voltage at C502
No power supply
Does DC voltage at C514
(300~385V)
Check if X501 FU501 is
properly inserted?
Check D501, R513, D502
Check if the 15V DC of
N503 (pin12)
Check N503 or peripheral
circuit
Supplementary power
supply N502 has problem
N
N
N
Y
Y
Y
No DC voltage output
Check if DC
voltage
of C550 is
3.3V(5V)
Check if DC
voltage
of V505 B
is 24V
Check if DC
voltage
of C541 is
12V
Problem exits in FU502, or there is
shortage on the main board
Check N503, T501 or D516
Main board has problem, or
It didn’t send out high level
control signal
Check N502 or peripheral
circuit
N
N
N
Y
Y
Y
Summary of Contents for PH-50HA31
Page 1: ...PDP TELEVISION PH 50HA31...
Page 14: ...12 IC block diagram 1 ZR39760...
Page 16: ...14...
Page 27: ...602 L37HA37 01 11...
Page 28: ...602 32HA37 01 602 32HA37 01 602 32HA37 01 602 L37HA37 01 11...
Page 29: ...602 L37HA37 01 11...
Page 30: ...602 L37HA37 01 11...
Page 31: ...602 L37HA37 01...
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Page 40: ...APPENDIX EXPLODED VIEW PH50X31...
Page 42: ...9350HA3110 Ver 1 0...