LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 114 -
4.11.4 Microphone for main MIC
Main Microphone path as below:
MIC
→
C567,C568
→
ESM internal CODEC
MIC
10u
C563
NA
C569
33p
C575
47p
C564
2
G1
3
G2
1
O
4
P
SPM0204HE5-PB-3
MIC500
22n
C568
22n
C567
10p
C576
MICBIAS
MIC1P
MIC1N
MSM pin W18
(CODEC VSS)
10%
Place near
0.1u
C235
AF20
MIC1N
AE20
MIC1P
MIC2N
AF21
MIC2P
AF22
AC21
LINE_L_IN
LINE_L_IP
AC22
LINE_R_IN
AC20
AC19
LINE_R_IP
AA20
CCOMP
AF19
AUXIP
AE19
AUXIN
C236
0.1u
10p
C200
0.1u
C238
C237
NA
NA
C204
C203
NA
MIC1P
MIC1N
Can you s coping some
sound signal at C567,C568?
Change the MIC or
Change the Main Bíd
NO
YES
YES
make som e sound or
voice to MIC
Work w ell?
END
YES
Start
MIC_BIAS(R221) is 1.8V?
Change the Main Bíd
NO
Make a call
Содержание KE990 - Viewty Cell Phone 100 MB
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