Philips DVP3000K - Page 13

4-3
All output voltages on the pow er board is 0V or deviated.
No
No
No
Yes
No
U1(PIN 8 - Drain waveform)
R eplace F1
R eplace C 4 if D1, D2, D3, D4 are
normal.
C heck/ replace U1.
C heck w hether U1 are eroded.
A
ll output voltages on
the pow er board is 0V o
r
deviated
C heck w hether there is
300V on C4.
C heck w hether 100K H z
oscillating signal on
Pin6 of U1
C heck if +5V, +3.3v, +12V,
-12V and -24V are short.
C heck w hether the com ponents in the
short-circuit voltage are defected or eroded.
Yes
Yes
Yes
Yes
U1(PIN 3 - RC waveform)
Trouble shooting chart
C heck w hether
F1 is blow n
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