Huawei U9500 Maintenance Manual page 91

U9500 Maintenance Guide
Figure 9-66 Handling process for the WCDMA RF reception failure
Issue 1.2 (2012-6-30)
WCDMA RF reception failure
Is the RF index normal?
N
Does the phone function properly
after being upgraded to the latest
software version?
N
Check whether the power supply to
the RF circuit is normal.
Y
Does the phone function properly
after having U4703 and then U4702
replaced?
N
Is the fault rectified after you replace
the corresponding circuit according
to the defective frequency band?
N
Does the phone function properly
after having U4701 replaced?
N
Replace U3801.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
9 Troubleshooting
Y
Check whether the
RF cable is in good
condition and whether
the antenna spring is
in good contact with
the antenna.
Y
End
N
Replace U4802.
Y
End
Y
End
Y
End
86