LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 132 -
4.12.4 Microphone for main MIC
Main Microphone path as below:
MIC
→
C567,C568
→
MSM internal CODEC
MIC
10u
C563
C568
22n
C569
NA
C564
47p
2
G1
3
G2
1
O
4
P
SPM0204HE5-PB-3
MIC500
33p
C575
10p
C576
C567
22n
MICBIAS
MIC1P
MIC1N
10%
Place near
MSM pin W18
(CODEC VSS)
C204
NA
C238
0.1u
0.1u
C235
C236
0.1u
NA
C237
NA
C203
C200
10p
SDCC_DAT1_GPIO99
F25
M25
SDCC_DAT2_GPIO100
SDCC_DAT3_GPIO101
M26
MIC1N
AF20
MIC1P
AE20
AF21
MIC2N
AF22
MIC2P
LINE_L_IN
AC21
LINE_L_IP
AC20
LINE_R_IN
LINE_R_IP
AC19
CCOMP
AA20
AF19
AUXIN
AE19
AUXIP
MSM
MSM
MSM
MIC1P
MIC1N
Can you scoping some
sound signal at C567,C568?
Change the MIC or
Change the Main B'd
NO
YES
YES
make some sound or
voice to MIC
Work well?
END
YES
Start
MIC_BIAS(R221) is 1.8V?
Change the Main B'd
NO
Make a call
Summary of Contents for U990
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