4-10

No video picture, no sound.
Change CE10, and D3.
No video picture,
no sound.
Check if the reset circuit consisting
of CE10, and D3 is normal (at a
high level for tens of milliseconds,
then constantl
y
at 0V
)
.
Check whether there is
27MHz si
g
nal out
p
ut.
Check if there is
128MHz signal output
Check the loaded circuit
Crystal oscillator Y1 and
peripheral components
are defected or eroded.
Check whether short-circuit
or bad solder on U7

Check if short-circuit and

bad solder exist on Pin Y1

No
No
No
No
No
Yes Yes
Yes
Yes
Yes
Reconnect the component in
short-circuit
Check U2.
Yes
No
27M waveform
SDRAM(R59 SDCLK) waveform
Check whether all the voltages
from the power board to the
decoder board are normal. CVBS(R85 point) waveform

Trouble shooting chart

Remark: Trouble shooting chart for

DVP3160K/XX

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