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Flow Chart of Troubleshooting
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9-7
9-4. Microphone Part - Earphone MIC
There is no sound(
VOICE
) from the Earphone
Yes
No
Is the Headset O.K?
Change the Headset
Yes
Check the connection of
CN705.
Connect CN705 with
Upper SPK module connector.
No
Yes
Check the components
which are connected to
MICBIAS_EAR_2.0V
Resolder R526, R528
No
Yes
Is there any signals at
C544
Check the Ear path.
No
Yes
No
Is EarPhone MIC Working?
Replace the Upper SPK Module.
Yes
END
