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4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.13.4 Microphone for main MIC
Main Microphone path as below:
MIC
→
C445, C446
→
C410, C411
→
U400 (Audio Codec)
→
C407, C408
→
U200 (MSM6280)
MIC1N, MIC1P
Can you s coping some
sound sign al at C446
Change th e MIC or
Change th e Main B'd
NO
YES
YES
make some sound or
voice to MIC
Work w ell?
END
YES
Start
MIC_BIAS(C422) is 1.8V?
Change the Main B'd
NO
Make a call
Can you s coping some
sound sign al at C407
Change th e Main B'd
NO
YES