Voice Transmitting Failure - Huawei U8500 Maintenance Manual

D902
D901
L902
L903

9.6.2 Voice Transmitting Failure

2010-12-21
U8500 Maintenance Manual Basic Version V1.1
Picture 9-3
Voice Transmitting failure
Test whether the impedance of
MIC is about 890Ω？
Y
Test whether Z901/C901 are
normal?
Y
Replace the U401
Huawei confidential. No spreading without permission.
Replace the
N
MIC
N Replace bad one
Refer to Picture 9-4
Internal
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