Philips DVP3120 Series Service Manual page 19

No video picture, no sound.
Check
voltages from the power
board to the decoder board
are normal.
Check if the reset circuit consisting
of CE17, R47, D2,L30 is normal (at
a high level for tens of milliseconds,
then constantly at 0V).
Check whether there is
27MHz signal output.
Check if there is 115MHz
signal output on L7.
No video picture,
no sound.
Go
whether all the
Yes
Yes
Yes
Yes
Check U4.
4-9
Remark: Trouble shooting chart for
DVP3120/51/55/94/75, DVP3120K/55/93/98
No
Check the loaded circuit
No
Crystal oscillator Y1 and
No
peripheral components
are defected or eroded.
No
SDRAM(L7 SDCLK) waveform
Reconnect the component in
short-circuit
Trouble shooting chart
CVBS(R85 point) waveform
Change CE17, R47,
27M waveform
Check whether
short-circuit or bad
solder on U3, U6
Yes
No