After turn on the power,
does LED turn on red light?
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 J9 normal?
N
Replace LED PCB
1.IR receiving BLOCK of MAIN PCB is not working.
2.Replace MAIN PCB
A.Check the connection between Main PCB and LED PCB.
B.Check the waveform first pin(IR) of P912B to confirm IR operation.
If IR is not working, replace the LED PCB.
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