Philips DVP5168K Service Manual page 23

All output voltages on the power board is 0V or deviated.
All output voltages on
the power board is 0V or
deviated
Yes
Check whether
F1 is blown
No
Check
there is 300V on C4.
Yes
Check whether 100KHz
oscillating
Pin6 of U1
Yes
Check if +5V, +12V, -12V
and are short.
Yes
Check whether the components in the
short-circuit voltage are defected or eroded.
Yes
No
whether
signal on
4-13
Remark: Trouble shooting chart for
Replace F1
Replace C4 if D1, D2, D3, D4 are
normal.
No
Check/ replace U1.
U1(PIN 3 - RC waveform)
No Check whether U2 are eroded.
Trouble shooting chart
DVP5166K/XX, DVP5168K/XX
U1(PIN 8 - Drain waveform)