Huawei G510 Maintenance Manual page 71

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:



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
2013-01-28
G510 Maintenance Manual V1.0
HSED_MICBIAS (headset microphone, PM8029/HSED_BIAS1)
SND_MICBIAS (secondary microphone, PM8029/HSED_BIAS2)
MSM_MICBIAS (primary microphone, 7227A/MIC_BIAS)
After a call is established, no
voice is transmitted.
Is the software
properly
reloaded?
N
Is voice properly
the
microphtransmitt
ed after one is re-
soldered?
N
Is the MICBIAS
voltage normal?
Y
Is voice properly
transmitted after
microphone
replacement?
N
Return the U8825-1 to Huawei
for repair.
Huawei Confidential
Y
End
Y
End
N
Check
C507.
Y
End
INTERNAL
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