Wcdma Rf Receiving Failure - Huawei U9200 Maintenance Manual

9.20 WCDMA RF Receiving Failure

Figure 9-28 WCDMA RF receiving failure troubleshooting process
(2012-06-13)
U9200 Maintenance Manual
WCDMA RF receiving failure
Is the RF index normal?
N
Is the RF index
recovered after you
update the software?
N
Is the power supply of the
RF circuit normal?
Y
Is the fault rectified
after you replace the
U4703 and U4702
respectively?
N
Is the fault rectified after
you replace the matching
circuit considering the
unfavorable frequency
band?
N
Is the fault rectified after you
replace the U4701?
N
Replace the U3801.
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Check if the RF
cable is in good
Y condition and the
antenna clip in
good contact.
Y
End
N
Replace the
U4802.
Y
End
Y
End
Y
End
INTERNAL
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