![background image](http://html.mh-extra.com/html/samsung/sgh-e490/sgh-e490_service-manual_1190574028.webp)
SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting and Circuit Diagrams
3-12
This Document can not be used without Samsung's authorization
3-1-5. Microphone Part
Microphone does not work
Check the assembled status of
microphone
Check the reference voltage on
mic path R411=2.9V
END
Reassemble microphone
Resolder or Change
(R411,R414,R416,R418,R420,R421,
R422,C404,C405,C406,C408,C410)
Check UCD301
Is Microphone O.K?
YES
YES
YES
YES
NO
NO
NO