5-19
Does the key operate?
Adjust latch
board
No
Yes
1
Power ON
Do not only START key?
Door should be closed?
No
No
Yes
When the door is opened,
is the voltage of door
sensing part under 0V?
(Pin 1 to Pin 3 of CN2)
No
No
Yes
3
Replace the PCB
(EBR73081807)
2
Check PCB
Go to No.4 of
This flow chart.
Is there any beep sound in
Continuity test between the
Ends of latch board?
Secondary Switch
(Door should be closed)
Yes
No
No
4
Reconnect or
repair
the connector.
Is the connector connected
to MAIN PCB assembly
disconnected or
disassembled?
(CN7 of Main PCB to
CON1 of Key PCB )
Replace the Main PCB.
(EBR73081807)
Replace the Key PCB if
Changing the Main PCB
Doesn’t resolve the problem
5
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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TROUBLE SHOOTING
