Philips DVP3111/55, Service Manual, Page: 28 / 51

5-9
Remote reception is insensitive or fails.
Yes
No
Remote reception is
insensitive or fails.
Check if the remote
control works properly.
Check battery
Check L2
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.
IR600 (PIN1 - RC waveform)
Check if there is IR
signal on pin 49 of U2
Check if the power supply
voltage to the remote censor
is normal
Go
No
No
No
Yes
Yes
Correct connection
Yes
Change U2
IR waveform
Trouble shooting chart