Receiver Path - LG KP270 Service Manual

4. TROUBLE SHOOTING

4.10.1 Receiver path

Connect the phone to network
Equipment and setup call
Setup 1KHz tone out and
Is there headset detection
Is there analog signal
Is there analog signal
Headset is work well? Headset is work well?
LGE Internal Use Only
start
Insert headset
YES
icon on the LCD?
YES
at C416, C420?
Click TP1
YES
at C417, C418?
Click TP2
YES
YES
END
NO
Change headset
Resolder C416, C420, Resolder C416, C420,
NO
C423, C424 or C423, C424 or
change the main board change the main board
NO
Resolder FB301, FB303
or change U401
NO
Check soldering CN301
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Only for training and service purposes