LG L1404R Service Manual - Page 28

Q01G, Q02G, Q03G for Delux Model

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Troubleshooting Guide Possible Trouble 6 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 DC PCB Ass'y DC 5V? YES Is the connection of NO CN-AC/DC OK? YES • Replace Receiver Ass'y. • Replace the battery. ••CChheecckkththeePPCCBBppaattteterrnn.. • Connect connector to CN-AC/DC exactly. Possible Trouble 7 It displays abnormally on DC PCB Ass'y. NO Is the IC01G good? YES NO Is the connection of NO CN-AC/DC OK? YES Does the IC03G (Q01G, Q02G, Q03G for Delux Model) NO operate normally on DC PCB Ass'y? YES • Replace the DC PCB Ass'y. 28 Room Air Conditioner • Replace IC01G. • Connect connector to CN-AC/DC exactly. • Replace IC03G (Q01G, Q02G, Q03G for Delux Model).

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28
Room Air Conditioner
Troubleshooting Guide
Possible Trouble 6
Remote controller does not operate.
Possible Trouble 7
It displays abnormally on DC PCB Ass’y.
NO
NO
NO
NO
YES
YES
YES
Is the IC01G good?
Is the connection of
CN-AC/DC
OK?
• Replace the DC
PCB Ass'y.
• Replace IC01G.
• Replace IC03G
(Q01G, Q02G, Q03G
for Delux Model).
• Connect connector
to
CN-AC/DC
exactly.
Does the IC03G
(Q01G, Q02G, Q03G for Delux Model)
operate normally on DC
PCB Ass'y?
• 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 DC 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