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4. Trouble Shooting
4.12.5. Microphone for headset
MIC for Head_Set path as below:
Insert Headset
¡
Interrupt which are the signal of Headset detecting arise in EAR_SENSE
Æ
MIC BIAS(PMIC_R506 : 1.6V~1.8V(MIC BIAS) -> MIC signal -> FB504 ->
-> C256 -> MSM7227
Insert Headset & Make a call
TP1(C259) is 1.6~1.8V?
Yes
END
Change the Main board
No
Can you scoping some sound
signal at TP2(FB504)?
Change the Main board
START
Make some sound or voice to MIC
Yes
Work well?
No
Yes
Yes