Main Microphone - LG InTouch Lady Service Manual

4. TROUBLE SHOOTING

4.13 Main microphone

MIC501 VMIC_BIAS_P(TP1_C526)
START
Make a call
MIC_BIAS(TP1_C526)
is about 1.8V?
Yes
Make sound to MIC
Sine wave appears at
TP2_C261?
Yes
Change the Main board
LGE Internal Use Only
MAIN_MIC_P(TP2_C261)
No
Change the Main board
No
Change the MIC
No
Work well?
- 78 -
MIC1P PAD of QSC6270(3G disable)
Yes
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END