Call Transmission; Figure 9-40 Troubleshooting Process For Sound Failure - Huawei U8815 Maintenance Manual

U8815
Maintenance Manual

Figure 9-40 Troubleshooting process for sound failure

9.4.4 Call Transmission


Issue 1.0 (2012-02-13)
After a call is established,
no sound is heard by the
other party.
Does the
call function normally
after the software
is reloaded?
N
Is the receiver
volume setting normal?
Y
Is the receiver
connection line normal?
Y
Does the
handset misjudge
headset insertion?
N
Is the
receiver volume setting
normal after the receiver is
replaced?
N
Do the
U2002 neighboring
circuits encounter cold joint or
soldering
offset?
N
Return the handset to
the factory for repair.
Circuit block diagram
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9 Principles and Failure Analysis
Y
End
N Adjust the volume to check
whether the setting is normal.
Re-solder the receiver
N
connection line.
Y Check and repair the
headset connector.
Y
End
Y
End
53