LG LRSXC2706 Series Service Manual page 74

Only for non Wi-Fi models
Communication Error (CO E)
1
Check the loose connection
2
Check the voltage.
Is CON101 voltage as below?
CON101
3 rd pin~ 4
CON101
Yes
3
Check the voltage in display.
Is CON101 voltage as below?
CON101
2
nd
CON101
No
Check the
Hinge (loose
connection)
No
Change the
Main PCB
Voltage [V]
11.5V~12.5V
th pin
Change the
Yes
Display PCB
Voltage
[V]
Not 0V,
pin ~ 3 pin
rd
5V
4
Check the voltage in display.
Is CON101 voltage as below?
CON101
No
5
Check the voltage in Main PCB.
Is CON5 15 th pin ~ 17
voltage 0V or 5V?
CON5
No
6
Check the voltage in Main PCB.
Is CON5 15 th pin ~ 18
voltage 0V or 5V?
CON5
No
7
Explain to customer
81
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Change the
Yes
Main PCB
Voltage
[V]
CON101
Not 0V,
1 st pin ~ 3 rd pin
5V
Change the
Yes
Display PCB
th pin
Voltage
[V]
CON5
Not
15 th ~ 17 th pin
0V, 5V
Change the
Yes
Main PCB
th pin
Voltage
[V]
CON5
Not
15 th ~ 18 th pin
0V, 5V