LG LFCS27596S Service Manual page 42

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