LG VX9100 Service Manual page 102

VX9100
START
Check audio signal at L501, L502
Check whether the internal lines of
FPCB are open or not between the pin
62/63 of 70pin connector and the receiver
pad RCV+/RCV-
Check the signal at RCV+/RCV- pad
Receiver will work properly
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Only for training and service purposes
YES
,
NO
YES
NO
YES
NO
YES
Checking Flow
Checking Flow
Check the soldering at
L501, L502
YES
Replace FPCB
Check the soldering of receiver
YES
- 101 -
Replace MSM or Main B/D
NO
Resolder L501, L502
Replace Receiver
NO
Resolder receiver
LGE Internal Use Only