LG MX8550 Service Manual page 104

MX8550
START
YES
Check audio signal at R601, R602
YES
Check whether the internal lines of
FPCB are open or not between the pin
44/45 of 80pin connector and the receiver
pad RCV+/RCV-
YES
Check the signal at RCV+/RCV-
YES
Receiver will work properly
LG Electronics Inc.
Checking Flow
Checking Flow
Check the soldering at
R601, R602
NO
YES
Replace FPCB
NO
Check the soldering of receiver
NO
YES
Replace MSM or Main B/D
NO
Resolder R601, R602
Replace Receiver
NO
Resolder receiver
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