Philips DVP3126 Service Manual page 20

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Check whether all the voltages
from the power board to the
decoder board are normal.
Yes
Check if the reset circuit
consisting ofEC9, D1 and Q1 is
normal (at a high level for tens
of milliseconds, then constantly
at 0V).
Yes
Check whether there is
27MHz signal output.
Yes
Check if there is 135MHz
signal output on R2.
Yes
Check if short-circuit and
bad solder exist on Pin
151
Yes
Reconnect the component in
manuals search engine
4-10
No
Check the loaded circuit
No
Change EC9, D1and Q1.
Crystal oscillator Y1 and
No
peripheral components
are defected or eroded.
No
SDRAM(R2 PCLK) waveform
No
Trouble shooting chart
CVBS(R21 point) waveform
27Mhz waveform
Check whether
short-circuit or bad
solder on U2,U4
No
Check U1.
Yes