F-Code Flow Chart; Error - LG LRE30451 Service

Key short error
Code Error mode
F-1 Key shorted
Key short error (F-1)
Plugged out the power, remove keypad-tail
and check F-1 error recur or not, after
plugging in the power
recur?
Disconnect power
Remove the main PCB(009A) harness
and pull the PCB(009A) forward from the PCB case
Inspect main PCB connector (CN11)
▶ pin to pin short(Back)
Front

F-CODE FLOW CHART

F-1 error
Operation
If a key pad is continuously short for
No
Yes
Repairable
by yourself?
Replace the main PCB(009A)
60 seconds.
Replace keypad or keypad assembly
Back
Yes
No
END
7-1
Times/sampling
END
Yes
Normal?
No
Repair and fix
END