4. TROUBLE SHOOTING
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4.8.5 2nd Mic
2nd Mic located on Main PCB Top Side..
It’s operating handset voice call and speakerphone
START
Check the Mic signal by test mode
(2nd loop back or Camcorder test)
Change Main Board
Check parts about Mic Bias
Mic works well?
Check Mic hole & rubber to
make the voice signal?
Yes
Yes
Yes
Yes
Change Mic
(MIC400)
Mic works well?
Change MT6575(U200).
Mic works well?
No
No
No
No
END