Philips DVP5980 Service Manual page 20

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
Check if there is IR
signal on pin 109 of U5
Go
Yes
if the power
Yes
Yes
No
Correct connection
4-9
No
Check battery
No
Check R315 C312 on the front board
No
Check the PIN 11 RC waveform of
IC1 on the remote PCB
Yes
Change U5
IR waveform
T rouble shooting chart