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Flow Chart of Troubleshooting
10-14
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10-1-7. EARPHONE Part
<EAR-MIC PATH>
C532
C531
C528
TA504
C536
MIC_BIAS
C533
R517
C527
C530
C535
C529
C534
R514
EARMIC_N
EARMIC_P
MIC2_P
MIC2_N
IIs the Headset O.K?
There is no sound(
VOICE
) from the Earphone
Change the Headset
Check the path
around MIC_BIAS circuit
END
No
Yes
Yes
Yes
Yes
No
Is there any signals at
L607 and L608
No
Check
UCP300
Check the reference voltage on Ear-MIC path
1.8V @ R514 ?
Yes
Yes
Check the IFC600