Philips DVP 5980, Service Manual, Page: 20 / 45

4-9
Remote reception is insensitive or fails.
No
Remote reception is
insensitive or fails.
Check if the remote
control works properly.
Check battery
Check R315 ǃ C312 on the front board
Use an oscilloscope to check if
there is output waveform from
the first pin IR of the remote
censor after pressing button on
Check the PIN 11 RC waveform of
IC1 on the remote PCB
Check if there is IR
signal on pin 109 of U5
Check if the power
supply voltage to the
remote censor is normal
Go
No
No
No
Yes
Yes
Yes
Correct connection
Yes
Change U5
IR waveform
Trouble shooting chart