Main Microphone - LG L705ix Service Manual

4. TROUBLE SHOOTING

4.16 Main microphone

MIC200 → C300,C301 → MIC1P, MIC1N(MSM6280)
Start
Make a call
MICBIAS (C233 or C2 37)
is 1.8V ?
Make so und to MIC
Sine wave appears at
C228, C229?
Chan ge th e Main board
SP0204 => 1.25T
SP0204LE5-PB
SUMY0010602
G3
PWR
G2
G1
OUT
MIC200
LGE Internal Use Only
NO
YES
YES
NO
YES
NO
< MIC >
5
4
0.1u
3
2
1
0.1u
Rev C
- 102 -
Chan ge main board
Chan ge th e MIC
YES
Work w ell?
R233
0
C228
MIC1N
MIC1P
C229
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
END
MICBIAS