- 101 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. Trouble Shooting
START
Connect the phone to network
Equipment and setup call.
Setup 1KHz tone out.
Does the sine wave appear
at
TP1, TP2
?
Change the main board
Does the sine wave appear
at Number
TP3, TP4
in the main FPCB CN702?
Change the Main FPCB
Does the sine wave appear
at EAR(+) PAD(
TP5
) in Upper FPCB?
Change the Upper FPCB
Is the soldering of the
receiver OK?
Resolder the Receiver
Can you hear sine wave
out of the receiver ?
Change the Receiver
END
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
1
2
3
3
The sine wave not appear
Содержание GD580
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