LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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START
Is the level of MIC+ AND MIC-
2.4Volt ?
Change the MIC
Check the signal level
at C624 at the putting
Audio signal in MIC
Does it work properly ?
END
Yes
Yes
Yes
No
A few hundred of mV
of the signal measured ?
Change the main B,d
Check the MIC bias level
at the pad of MIC
Resolder C624.C625
and try again.
If fail again,
change the main Bíd
3
2
1
No
Yes
Yes
No
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Содержание KT520
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