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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
4.10.5. Headset MIC(Voice call, Video Telephony )
START
Insert Headset.
Does the Headset icon display
on the main LCD?
Does it work properly ??
Try again from the start
END
YES
YES
YES
NO
NO
NO
Change the main B'd
Does the level of R627
under 0.5Volt ?
NO
Does the level of R429
over 2.0Volt ?
YES
N0
Change the main B,d
YES
Check the signal level
at C426 at the putting
Audio signal in MIC
Resolder C426
and try again.
If fail again,
Change the main B'd
A few hundred of mV
of the signal measured
at C426 ?
Resolder R627,
And try again from the start
4
1
2
5
8
9