LG LG-P715 - Page 108

4. TROUBLE SHOOTING
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Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.13.6 Headset microphone
MIC Signal: 3.5 pi Headset (J6001) -> R6038 (TP3) MIC of FSA8008UMX & C2016 (TP4) MIC2P of MSM8225
MIC Bias : VREG_MSME_1.8V -> C6016 (TP1)
HS Detect IC Bias: VREG_P3_2.85V -> C6014 (TP2)
Change the U6001(Max14579E) or
Change the Main PCB
Change the Headset or Re-solder
change the CN1000 or
Change the Main PCB
Change the U200
(MSM7225A or Change the Main PCB)
Make a call
Make some sound or voice to MIC
Some sound signal appears at
FB100(TP4)
TP2 is about 2.85V?
Some sound signal appears at(TP3)?
TP1 is about 1.8V?
No
No
No
No
Yes
Yes
Yes
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