Daewoo LM32L1 - 6-1-4.When Remote Controller Does Not Operate

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Main PCBs Trouble Diagnosis
6-1-4.When Remote Controller doses not operate
After turn on the power,
does LED turn off?
Check start
Y
Y
Y
Y
N
1.Check AC connection
2.Check Power S/W ON
3.Check other BLOCKs
Is Remote Controller working?
N
Chek the Battery of
Remote Controller
Does set working by pressing a KEY button?
N
Check the connection between
LED PCB and MAIN PCB
When you press button,
does waveform form first pin of P902 normal?
N
Replace LED PCB
Check Main PCB
A.Check the connection between Main PCB and LED PCB.
B.Check the waveform first pin(IR) of P902A to confirm IR operation.
If IR is not working, replace the LED PCB.