U8800 Maintenance Manual Basic Version V1.1 Internal
2011-03-21
Huawei confidential. No spreading without permission. Page 45 of 61
9.10 Earphone&TV OUT Failure
Reference Figure 9-7
Earphone failure
Check whether J801 is normal?
Y
Replace the J801N
Measure whether voltage of the
U3701&U801 is normal?
Y
Replace the U201
N
Replace faulty
components
Measure whether the D801 is
normal?
N Replace the D801
Y
Measure whether the Z801 is
normal?
N Replace the Z801
Replace the sub_PCB, whether it
is normal?
Y End
Y
N