LG LG-P350 - Page 130

4. TROUBLE SHOOTING
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4.13.5. Microphone for headset
MIC for Headset path as below:
Insert Headset Æ Interrupt which are the signal of Headset detecting arise in EAR_SENSE
Æ HS_MIC_BIAS:1.2~1.4V (MICBIAS) ÆMIC signal ÆTP1(FB605) Æ TP2( C317) Æ MSM7227
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uv
Make some sound to MIC
The signal appear at
TP1(FB600)?
No
Yes
The signal appear at
TP2(C317)?
START
END
Re-solder at TP1
or Check the J600
No
Yes
MICBIAS(C606) is 1.2~1.4V?
Yes
Insert Headset & Make a Call
No
Check the Q600 or Change the Main B’d
Check the TP2
or Change the Main B’d