LG LFX28978 Series - Page 33

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8-9 Communication Error (Er CO)
No
1
2
Checking flow
Check the loose connection.
Check the Red to White/Red.
Result & SVC Action
Result
12 V
Other
SVC Action
Go to the 3
Check the Hinge
(loose connection)
Change the Main PCB
5 Check the White/Red to Orange.
<CON5>
<CON5>
6 Check the White/Red to White/Black.
<CON101><Display>
CON101
3 Check the Orange to White/Red.
Result
0 V or 5 V
Other
SVC Action
Change the Display PCB
Go to the 4
4 Check the White/Black to White/Red.
Result
0 V or 5 V
Other
SVC Action
Change the Main PCB
Go to the 5
Result
0 V or 5 V
Other
SVC Action
Change the Display PCB
Go to the 6
Result
0 V or 5 V
Other
SVC Action
Change the Main PCB
Explain to customer
<CON101><Display>
CON101
<CON101><Display>
CON101