Touch Panel Failure - Huawei U8650-NFC Maintenance Manual

9.8 Touch Panel Failure

Reference Figure 9-5
2011-06-09
U8650-NFC Maintenance Manual Basic Version V1.0
TP failure
Download the
latest software version, check
whether it is normal?
N
Measure whether
power supply for TP
(VREG_MSMP) is normal?
Y
Measure whether
J1502 is normal?
Y
Replace the TP module,
check whether it is normal?
N
Measure whether
RV1501-RV1504 are
normal?
Y
Replace the U401
Huawei confidential. No spreading without permission.
Y End
N Replace U201
Re-solder and
N
replace J1502
End
Y
Replace faulty
N
components
Internal
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