LG GC-B207GLQV Service Manual page 43

MAIN PCB
Is the CON5 loose?
No
Main PCB
Is the voltage between pin15
and pin15 of CON5 as below?
Pin18 Pin15
Receive signal voltage
Test Point
pin15 To pin18
Yes
Reconnect
Yes
Replace
No
MAIN PCB
Result
1 V to 4 V
Main PCB
Is the voltage between pin15
and pin17 of CON5 as below?
Pin17 Pin15
Send signal Voltage
Test Point
Pin15 To pin17
After plug in,
If CO E disappeared,
Explain to the customer!
- 43-
No
Replace
MAIN PCB
Result
1 V to 4 V
Yes