Service manual

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Main PCB Trouble Diagnosis
Is 5th pin from the top of PC102 output normal?
1. Check AC connection
2. Check Power S/W ON
3. Check other PCBs
1. Replace the CONNCETOR.
2. Replace Key PCB.
Check the connection of KEY
PCB toMAIN PCB
Check MAIN PCB
Check start
N
N
N
Y
Y
Does LED turn on (green light)?
Y
Y
Does LED next to Power S/W
turn on (red light)?
6. When Key does not operate