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4-8
Remote reception is insensitive or fails.
No
Remote reception is
insensitive or fails.
Check if the remote
control works properly.
Check battery
Check R66
ǃ
C68
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.
REM1(PIN 3 - RC waveform)
Check if there is IR
signal on pin 106 of U12
Check if the power
supply voltage to the
remote censor is normal
Go
No
No
No
Yes
Yes
Yes
Correct connection
Yes
Change U1
IR waveform
Trouble shooting chart