Table of Contents
Advertisement
Main PCBs Trouble Diagnosis
7-1-3. When Control Key does not operate
After turn on the power, does LED turn on red light?
After ST-BY on Does LED turn on green light?
Is output first pin PW7 normal?
Check Main PCB
A. First check connection, and then check the output of first pin of PA912(ST-BY 3.3V)
B. Check waveform first pin and third pin of PA911.
If waveform does not appear, replace connector or KEY PCB.
-main TP : RC398, RC399
Check Start
Y
Y
Y
1. Check AC connection
N
2. Check Power S/W ON
3. Check other PCBs
Check the connection of KEY PCB
N
to MAIN PCB
-> Check the connection between
KEY PCB and MAIN PCB
N
1. Replace the CON NECTOR
2. Replace KEY PCB
-39-
Advertisement
Table of Contents
