Philips DVP3140 Service Manual page 29

Remote reception is insensitive or fails.
Remote reception is
insensitive or fails.
Check if the remote
control works properly.
Check if the power 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 134 of U1
Correct connection
Go
Yes
Yes
Yes
No
4-19
No
Check battery
No
Check R315 C315
No
REM301(PIN1 - RC waveform)
Yes
Change U1
IR waveform
Trouble shooting chart
Remark: Trouble shooting chart for
DVP3142(K/KM)/XX
DVP3144(K)/XX