LG L1404R Service Manual - Page 31

of CN-AC/DC on AC PCB

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Possible Trouble 4 FAN does not operate. Is the voltage NO.1 or 2 or 4 NO of IC01M DC 5V? YES Is the voltage NO.16 or 15 or 13 NO of IC01M 0V? YES • Check the RY-Hi or RY-Med or RY-Lo. • Check the wiring diagram. Possible Trouble 5 Remote controller does not operate. Is the voltage of Battery NO over 2.3V? YES Is the voltage No.10 NO of CN-AC/DC on AC PCB Ass'y DC 5V? YES Is the connection of NO CN-AC/DC OK? YES • Replace Receiver Ass'y. Troubleshooting Guide • Replace IC01M. • Replace IC01M. • Replace the battery. ••CChheecckk tthheePPCCBBpaptatettrenr.n. • Connect connector to CN-AC/DC exactly. Service Manual 31

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Service Manual
31
Troubleshooting Guide
Possible Trouble 4
FAN does not operate.
Possible Trouble 5
Remote controller does not operate.
• Replace IC01M.
• Replace IC01M.
Is the voltage NO.1 or 2 or 4
of IC01M DC 5V?
Is the voltage NO.16 or 15 or 13
of IC01M 0V?
• Check the RY-Hi or
RY-Med or RY-Lo.
•
Check the wiring diagram.
NO
NO
YES
YES
• Check the PCB pattern.
Is the voltage of Battery
over 2.3V?
• Replace Receiver Ass'y.
Is the connection of
CN-AC/DC OK?
Is the voltage No.10
of CN-AC/DC on AC PCB
Ass'y DC 5V?
• Replace the battery.
• Check the PCB pattern.
• Connect connector to
CN-AC/DC exactly.
NO
NO
NO
YES
YES
YES