Earphone Failure - Huawei U8510-1 Maintenance Manual

9.11.4 Earphone Failure

Reference Figure 9-8
2011-05-28
U8510-1 Maintenance Manual Basic Version V1.0
Earphone failure
Inset a normal earphone,
check whether earphone is
identified?
Y
Measure the U1101,
check whether it is normal?
Y
Measure whether the Z1101
is normal?
Y
Replace the U401
U1101
U501
Figure 9-8
Huawei confidential. No spreading without permission.
Replace the
N
J1101
Replace the
N
U1101
Replace the
N
Z1101
VREG_MSMP
U1101
Test R1107
VREG_MSMP
U1101
Test R503
Z1101 Varistor
Internal
2.6V
2.6V
/
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