Philips DVP352X Service Manual page 19

Remote reception is insensitive or fails.
Remote reception is
insensitive or fails.
Check if the remote
control works properly.
Check
supply voltage to the
remote censor is normal
Use an oscilloscope to check if
there is output waveform from the
first pin IR of the remote censor
after pressing button on the remote
control.
Check if there is IR
signal on pin 2 of U1
Correct connection
Go
Yes
if the power
Yes
Yes
No
4-9
No
Check battery
No
Check R315 C315
No
REM301(PIN1 - RC waveform)
Yes
Change U1
IR waveform
Trouble shooting chart