Moto X Pure Edition/Moto X Style
Baseband TROUBLESHOOTING GUIDES
MOTOROLA CONFIDENTIAL
If the Primary MIC is not functioning …
- Check MIC bias at C4500 or C4504 or C4503. This should be 1.7~1.8V when the microphone is
enabled.
- Check the 1
st
microphone sealing cushion at bottom PCB. If the cushion has been shifted, the MIC
hole could be blocked. (See image below)
- Check the microphone output at C4501 or C4502. The AC amplitude should increase (Output DC
bias should be around 0.7V), when audio is present.
Primary Microphone
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