LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 120 -
4.16 Main microphone
MIC300 -> C323,C324 -> MIC1P,MIC1N(MSM6280)
Start
MICBIAS(C24 or C29)
is 1.8V ?
Change main board
NO
Make a call
Change the MIC
NO
YES
Change the Main board
Make sound to MIC
Work well?
END
YES
NO
YES
Sine wave appears at
C27,C28 ?
YES
MIC
0
R40
NA
C31
C27
0.1u
1u
C24
33p
C1
10u
C29
0.1u
C28
G1
2
3
G2
5
G3
1
OUT
PWR
4
SUMY0010602
SP0204LE5-PB
MIC1
MICBIAS
MIC1P
MIC1N
Содержание L704I
Страница 1: ...Date September 2007 Issue 1 0 Service Manual Model L704i Service Manual L704i Internal Use Only ...
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Страница 202: ...LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes Note ...
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