Earphone Can't Transmit Voice - Huawei U8350 Maintenance Manual

9.11.5 Earphone Can't Transmit Voice

Reference Figure 9-14
Z1101
U1101
2011-05-18
U8350 Maintenance Manual Basic Version V1.0
Earphone no voice
Measure the voltage of
J1102 Pin3 is normal?
Y
Check if J1102 is normal?
Y
Check if D1102 is normal?
Y
Replace the U401
Plug in earphone: low level
Earphone
Plug out earphone: high level
J1102
Figure 9-14
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Check R1102/
R1103/ C1103,
N
and replace the
fault componet.
N Replace J1102
Replace D1102
N
VH:2.6V
VL:0V
D1102
Internal
J1102
Pin3
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