LG LWC0961AHG_ABG_AHE / LWC0961PHG_PBG / W09LH Service Manual ▷ View online
—20—
• Check the Fuse.
• Check the wiring diagram.
• Check the wiring diagram.
Is the Trans input power
the same as specified?
Is the Trans output power
about AC 14V?
Is shorted the Trans. output?
Is output Voltage of IC01D
DC 12V?
Is output Voltage of IC02D
DC 5V?
Is the voltage No.18 of Micom
DC 5V?
Exchange Main PCB Ass'y.
Is the
connection between
Main and Display
all right?
Is the reset circuit all right?
(The No.14 of
Micom is 5V.)
• Check the Fuse.
• Check the wiring diagram.
• Check the wiring diagram.
• Check the Main
PCB pattern.
PCB pattern.
• Exchange the Trans.
• Exchange D02D~D05D.
• Exchange IC01D.
• Exchange IC01D.
• Exchange IC02D.
• Exchange IC01A, C02A.
• Connect connector
exactly.
exactly.
• Check the PCB
pattern.
pattern.
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
YES
■
ELECTRICAL PARTS TROUBLESHOOTING GUIDE
Possible Trouble 1
The unit does not operate.
—21—
Is setting
Temp. set lower than Room
Temp.-0.5
°
C?
Is the voltage No.10
of IC01M 0V?
• Exchange IC01M.
• Select the setting Temp. to lower Number.
• Wait 3 Minutes.
Is the Unit for 3 minutes
delay?
• Exchange MAIN
PCB Ass'y.
PCB Ass'y.
Is the voltage N0.7 of
IC01M DC 5V?
• Check the RY-COMP.
• Check the wiring
Diagram.
Diagram.
NO
NO
NO
YES
YES
YES
YES
Is the wire connection of
RY-COMP all right?
• Check the RY-COMP.
• Connect LEAD Wire to
RY-COMP again.
RY-COMP again.
NO
YES
NO
Possible Trouble 2
The compressor does not operate.
Possible Trouble 3
The compressor always operate.
—22—
• Exchange IC01M.
• Exchange IC01M.
Is the voltage NO.1 or 2 or 4
of IC01M DC 5V?
Is the voltage NO.13 or 15 or 16
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
about over 2.3V?
• Exchange Receiver Ass'y.
Is the connection of
CN-DISP all right?
Is the voltage No.16
of CN-DISP on Main PCB
Ass'y DC 5V?
• Exchange the battery.
• Check the PCB pattern.
• Connect connector to
CN-DISP exactly.
CN-DISP exactly.
NO
NO
NO
YES
YES
YES
Possible Trouble 4
FAN does not operate.
Possible Trouble 5
Remote controller does not operate.
—23—
NO
NO
NO
NO
YES
YES
YES
Is the IC01G all right?
Is the connection of
CN-DISP all right?
• Exchange the display
PCB Ass'y.
PCB Ass'y.
• Exchange IC01G.
• Exchange Q01G,
Q02G, Q03G, Q04G
• Connect connector
to CN-DISP exactly.
to CN-DISP exactly.
Does the Q01G,
Q02G, Q03G, Q04G operate normally
on main PCB Ass'y?
Possible Trouble 6
It displays abnormally on display PCB Ass’y.
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