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Flow Chart of Troubleshooting
9-7
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9-1-4. Microphone Part
①
Is the assembled status
of microphone O.K?
Microphone does not work
Reassembled the microphone
Resolder or change
R412,R413,R414,R415,R416,R418,R419,
C430,C439,C473,C474
END
No
Yes
Yes
Yes
Yes
No
Is microphone ok?
No
Check the
U100
Check the reference voltage on mic path
C116 = 2.8V ?
Yes
①
C427
R413
C443
VCCA_2.8
C442
R430
R439
C457
V401
R431
R418
C430
C474
R412
C434
C428
C435
C436
C458
C410
C459
C411
V400
R415
R428
C473
R419
C439
V402
C462
R435
R416
R429
R414
DAC_MICN
EAR_MIC_N
AUXINN
AUXOUTN
DAC_MICP
MICOUTP
MICINP
MICINN
MICOUTN
AUXOUTP
AUXINP
EAR_MIC_P
MIC-
MIC+