Communication Error - LG GC-B207GLQV Service Manual

Communication Error

Is it displayed under picture?
Yes
Is the connection loose ?(CON101)
No
Display PCB
Is the voltage between pins 2 and
pin 3 of CON101?
Send signal Voltage
Test Point
pin2 To pin3
Yes
CON6
BN(Rx)
18
RD(Tx)
17
MAIN
BO(GND)
PCB
15
WH/BK(12V)
16
Yes
Reconnect
N0
Pin3
Pin2
Result
1V to 4 V
Cover Hinge
BN(Tx)
2
2
RD(Rx)
3
1
BO(GND)
4
3
WH/BK(12V)
1
4
Wiring diagram
Display PCB
Is the voltage between pins 1
and pin 3 of CON101?
Receive signal voltage
Test Point
pin1 To pin3
Is the joint connection
loose in the hinge?
Replace
Display
PCB
- 42-
CON101
2
1
DISPLAY
PCB
3
4
Rx: Receive
Tx: Send
Pin3
Pin1
Result
1 V to 4 V
Yes
Yes
No
N0
Replace
Display
PCB
Reconnect