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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 are 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 109 of U2
Correct connection
Go
Yes
Yes
Yes
No
4-19
Remark: Trouble shooting chart for
No
Check battery
No
Check R315 C315 on the front board
No
Check the PIN 11 RC waveform of IC1
on the remote PCB
Yes
Change U2
IR waveform
Trouble shooting chart
DVP5166K/XX, DVP5168K/XX
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