Huawei U9500 Maintenance Manual page 73

U9500 Maintenance Guide
Figure 9-43 Handling process for the phone ringing failure
Handling Process for the Voice Transmission Failure
Figure 9-44 shows the process for handling the voice transmission failure.
Figure 9-44 Handling process for the voice transmission failure
Issue 1.2 (2012-6-30)
Ringing failure
Check whether the
phone speaker functions
properly.
Y
Check whether the
speaker signal circuit is
in good condition.
Y
Resolder or replace U1201.
Voice transmission failure
Check whether the
microphone module and
sub-board are in good
condition.
Y
Check whether the
signal circuit is in good
condition.
Y
Replace U1201.
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N
Replace the speaker.
N
Rectify the faults on
the FPC flat cables
and J2203 on the
PCBA.
N
Replace the
microphone module
or sub-board.
Rectify the faults on
N
the microphone
sub-board, FPC flat
cables, and relevant
signal circuits on the
PCBA.
9 Troubleshooting
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