Philips DVP3000K - Page 20

4-10
No video picture, no sound.
C hange C 88, and R 80.
No video picture,
no sound.
C heck if the reset circuit consisting
of C88, R80 and D1 is normal (at a
high level for tens of milliseconds,
then constantl
y
at 0V ).
C heck w hether there is
27M H z si
g
nal out
p
ut.
C heck if there is 93M H z
signal output on R 89.
C heck the loaded circuit
Crystal oscillator Y1 and
peripheral com ponents
are defected or eroded.
C heck w hether short-circuit
or bad solder on U7, U 17
C heck if short-circuit and bad
solder exist on Pin Y3
No
No
No
No
No
Yes Yes
Yes
Yes
Yes
R econnect the com ponent in
short-circuit
C heck U3.
Yes
No
27M waveform
SDRAM(R 82 SDCLK) waveform
Trouble shooting chart
C heck w hether all the voltages
from the pow er board to the
decoder board are normal.
CVBS(R 85 point) waveform
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