LG L1404R Service Manual page 28

Troubleshooting Guide
Possible Trouble 6
Is the voltage of Battery
over 2.3V?
YES
Is the voltage No.10
of CN-AC/DC on DC PCB
Ass'y DC 5V?
YES
Is the connection of
CN-AC/DC OK?
YES
• Replace Receiver Ass'y.
Possible Trouble 7
Is the IC01G good?
YES
Is the connection of
CN-AC/DC OK?
YES
Does the IC03G
(Q01G, Q02G, Q03G for Delux Model)
operate normally on DC
PCB Ass'y?
YES
• Replace the DC
PCB Ass'y.
28 Room Air Conditioner
Remote controller does not operate.
NO
NO
NO
It displays abnormally on DC PCB Ass'y.
NO
NO
NO
NO
• Replace the battery.
• Check the PCB pattern.
• Check the PCB pattern.
• Connect connector to
CN-AC/DC exactly.
• Replace IC01G.
• Connect connector
to CN-AC/DC exactly.
• Replace IC03G
(Q01G, Q02G, Q03G
for Delux Model).