LG LFXS30786 Series, Service Manual

Page: 53 / 118

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Check the
Hinge (loose
connection)
Change the
Main PCB
Communication Error (E CO)
2
Check the voltage.
Is CON101 1 st pin ~ 2 nd pin
voltage 12V?
No
Yes
7
Explain to customer
1
Check the loose connection
CON101
Voltage
[V]
CON101
1
st pin ~ 2 nd pin
12V
Change the
Display PCB
3
Check the voltage.
Is CON101 2
nd pin ~ 3 rd pin
voltage 0V or 5V?
Yes
No
Voltage
[V]
CON101
2
nd pin ~ 3 rd pin
Not
0V, 5V
Change the
Main PCB
4
Check the voltage.
Is CON101 2
nd pin ~ 4 th pin
voltage 0V or 5V?
Yes
No
Voltage
[V]
CON101
2
nd pin ~ 4 th pin
Not
0V, 5V
Change the
Display PCB
5
Check the voltage.
Is CON5 4
th pin ~ 6 th pin
voltage 0V or 5V?
Yes
No
Voltage
[V]
CON5
4
th pin ~ 6 th pin
Not
0V, 5V
Change the
Main PCB
6
Check the voltage.
Is CON5 4
th pin ~ 8 th pin
voltage 0V or 5V?
Yes
No
Voltage
[V]
CON5
4
th pin ~ 8 th pin
Not
0V, 5V
CON101
CON101