Analysis
The G510 provides the primary and secondary microphones to collect different voice signals
and processes the collected voice signals to filter noises. The G510 uses the following power
supplies:
HSED_MICBIAS (headset microphone, PM8029/HSED_BIAS1)
SND_MICBIAS (secondary microphone, PM8029/HSED_BIAS2)
MSM_MICBIAS (primary microphone, 7227A/MIC_BIAS)
Troubleshooting
Fault symptom: The G510 fails to transmit voices.
Handling: Troubleshoot the fault according to the process shown in Figure 9-34.
Figure 9-34 Troubleshooting process when the G510 fails to transmit voices
After a call is established, no
voice is transmitted.
Is the software
properly
reloaded?
End
Y
Is voice properly
the
microphtransmitt
ed after one is re-
soldered?
N
End
Y
N
Is the MICBIAS
voltage normal?
Check
C507.
N
Y
Is voice properly
transmitted after
microphone
replacement?
End
Y
N
Return the U8825-1 to Huawei
for repair.
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