4. TROUBLE SHOOTING
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4.17.5 Headset microphone
MIC Signal: 3.5 pi Headset (CN10000) -> R6014 (TP4) MIC of MAX14579E & C2011 (TP4) MIC2P of MSM7225A
MIC Bias : VREG_MSME_1.8V -> R6013 (TP1) DET -> R6015DET_IN -> Headset MIC \
HS Detect IC Bias: VREG_P3_2.85V -> C6035 (TP2)
No
START
Make a call
Yes
No
Make a some sound or voice to MIC
Yes
TP1 is about 1.8V?
Some sound signal appears at
TP4?
Some sound signal appears at
TP3?
Work Well?
END
No
Change the U200 (MSM7225A) or
Change the Main PCB
TP2 is about 2.85V?
Change the U6001 (MAX14579E) or
Change the Main PCB
Change the Headset or Re-solder/
Change the CN1000 or
Change the Main PDB
No