LG LMXS27626S Service Manual page 45

Communication Error (E CO)
1
Check the loose connection
2
Check the voltage.
Is CON101 5 pin ~ 6
th th
voltage 12V?
Voltage
Housing
CON101
5 pin ~ 6
th th
12V
pin
Yes
3
Check the voltage.
Is CON101 4 pin ~ 5
th th
voltage 0V or 5V?
Voltage
Housing
CON101
4 th pin ~ 5 th
0V, 5V
pin
No
Check the
No
Hinge (loose
connection)
pin
Change the
Main PCB
[V]
Change the
Yes
Display PCB
pin
[V]
Not
4
Check the voltage.
Is CON101 5 th pin ~ 3
voltage 0V or 5V?
Housing
CON101
5 th pin ~ 3 rd
pin
No
5
Check the voltage.
Is CON5 4 pin ~ 6
th
voltage 0V or 5V?
CON5
No
6
Check the voltage.
Is CON5 4 pin ~ 8
th
voltage 0V or 5V?
CON5
No
7
Explain to customer
- 45 -
Change the
Yes
Main PCB
rd pin
Voltage
[V]
Not
0V, 5V
Change the
Yes
Display PCB
pin
th
Voltage
Housing
CON5
4 pin ~ 6
th th
0V, 5V
pin
Change the
Yes
Main PCB
pin
th
Voltage
Housing
CON5
4 pin ~ 8
th th
pin
[V]
Not
[V]
Not
0V, 5V