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No video picture, no sound.
Check whether all the voltages
from the power board to the
decoder board are normal.
Check if the reset circuit consisting
of CE10, and D3 is normal (at a
high level for tens of milliseconds,
then constantly at 0V).
Check if there is 128MHz
signal output from R59.
Check if short-circuit and bad
Reconnect the component in
short-circuit
No video picture,
no sound.
Go
Yes
Yes
Check whether there is
27MHz signal output.
Yes
SDRAM(R59 SDCLK) waveform
Yes
solder exist on Pin Y1
Yes
4-20
Remark: Trouble shooting chart for
No
Check the loaded circuit
No
Change CE10, and D3.
Crystal oscillator Y1 and
No
peripheral components
are defected or eroded.
Check whether
No
short-circuit or bad
solder on U7
No
Trouble shooting chart
DVP5166K/XX, DVP5168K/XX
CVBS(R85 point) waveform
27M waveform
No
Yes
Check U2.
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