Audio Trouble - LG KP270 Service Manual

4. TROUBLE SHOOTING

4.10 Audio Trouble

4.10.1 Receiver path
Connect the phone to network
equipment and setup call.
Setup 1KHz tone out
Is there analog signal
Is there analog signal
Receiver is work well? Receiver is work well?
LGE Internal Use Only
start start
at R405, R406?
Click TP1
YES
at C427, C428?
Click TP2
YES
YES
END END
NO
Change the main board Change the main board
NO
Change U401 Change U401
1.Check soldering and
resolder CN302,CN903
NO
2.Change the Speaker
3.Change the FPCB
4.Chagne the Slide
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