Audio Malfunction; No Ring Tone - Huawei U8510-1 Maintenance Manual

9.11 Audio Malfunction

9.11.1 No Ring Tone

Reference Figure 9-7
2011-05-28
U8510-1 Maintenance Manual Basic Version V1.0
No ring tone
Measure whether
the impedance value of
speaker is about 8Ω?
Y
Measure whether
main FPC is damaged?
N
Measure whether the U101 is
normal?
Y
Replace the U401
Figure 9-7
Huawei confidential. No spreading without permission.
Replace the
N
speaker
Replace faulty
Y
components
Replace the
N
U101
U101 VDD
U101 Audio PA
Internal
4.2V
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