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4. TROUBLE SHOOTING
4.13.4. Microphone for main MIC
Main Microphone path as below:
MIC Æ C370&C371(Besides GND) Æ C340&C341 Æ MSM7200A
Can you scoping some
sound signal at TP2,TP3?
Change the MIC
NO
YES
YES
make some sound or
voice to MIC
Work well? END
YES
Start
TP1 is 1.8V? Change the Main B’d
NO
Make a call
Can you scoping some
sound signal at TP4?
NO
YES
Change the Main B’d
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