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