Moto X Pure Edition/Moto X Style
Baseband TROUBLESHOOTING GUIDES
MOTOROLA CONFIDENTIAL
If the Tertiary MIC is not functioning …
- Check MIC bias at C4520 or C4524 or C4523. This should be 1.7~1.8V when the microphone is
enabled.
- Check the 3
rd
microphone sealing grommet and adhesive on the 3
rd
MIC part. If the grommet and
adhesive have been assembled abnormally, the MIC hole could be blocked while it has been
assembled. (See image below)
- Check the microphone output at C4521 or C4522. The AC amplitude should increase (Output DC bias
should be around 0.7V), when audio is present.
Tertiary Microphone
Blocked hole
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