LG KF600w Service Manual page 103

START
YES
Check audio signal at C616, C617
YES
Check whether the internal lines of
FPCB are open or not between the pin
46/47 of 50pin connector and the receiver
pad RCV+/RCV-
YES
Check the signal at RCV+/RCV-
YES
Receiver will work properly
Checking Flow
Checking Flow
Check the soldering at
C616, C617
NO
Replace FPCB
NO
Check the soldering of receiver
NO
NO
YES
NO
YES
Replace MSM or Main B/D
Resolder C616, C617
Replace Receiver
Resolder receiver