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Flow Chart of Troubleshooting
9-6
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9-1-3. Microphone Part (MAIN)
Microphone does not work
Yes
Is the assembled status of
microphone O.K?
Yes
No
Reassemble the microphone
Check the reference voltage on mic path
Yes
On booting,
HSED_BIAS(L500)
≒
1.8V ?
Yes
No
No
Check UCP300
On calling,
MIC1+(C502) & MIC1-(C507)
≒
1.0V?
Yes
On booting,
voltage between
MIC1+(L502) and MIC1-(GND)
≒
0.8V?
No
Yes
Change MIC_500
On calling,
MIC_SEL(U500 pin4&8) are
≒
0V ?
Yes
No
Check UCP300
Check UCP300
END
Summary of Contents for GT-S3370
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