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4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.10.1 Receiver path
start
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out and
Insert headset
YES
Is there analog signal
at C416, C420?
Click TP1
Resolder C416, C420,
C423, C424 or
change the main board
Headset is work well?
END
Resolder FB301, FB303
or change U401
YES
YES
NO
NO
NO
Check soldering CN301
YES
Is there analog signal
at C417, C418?
Click TP2
Is there headset detection
icon on the LCD?
Change headset
NO
YES
Resolder C416, C420,
C423, C424 or
change the main board
Headset is work well?
Содержание KP275
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