LG LSE3090ST Service Manual page 61

CHECKING FLOW CHART BY FAILURE
Door Lock System Failure,F-10?
Note :
Just after self-clean start, the door lock motor
starts to rotate.
During that time if the door lock switch does not
operate properly after rotating twice, then
supervising circuit detects a Door Lock failure
and the F-10 error code appears.
Power Off
1
Is the disconnect or loose
connector?
1. Between Main PCB and
Relay PCB (CN7,CN10)
2. Electric wiring of relay PCB(CN12)
3. Electric wiring of Locking Motor and Micro
Switch
4.Electric wiring of CN4 of Main PCB
Yes
Reconnect
Yes
or repair the
connector
CN12 CN4
No
Power Off
2
Is the door lock switch
(micro switch) normal?
measure the resistance of
door lock switch
Power Off
3
Is the resistance of the locking
motor normal ?
measure the resistance of
locking motor
Normal : approximately 2.6kΩ
Abnormal : infinite or below 5
Replace the Relay PCB(EBR52349701)
9-8
No
Replace the
micro switch
normally open type
Normal Abnormal
Yes
No Replace the
locking motor
Ω
Yes