Rf Receiving Failure; Rf Receiving Failure-Wcdma900Mhz - Huawei U8800 Maintenance Manual

9.16 RF Receiving Failure

9.16.1 RF Receiving Failure-WCDMA900MHz

Analysis：Above all, check RF parameter whether is correct,
failure usually. Reference Figure 9-10
2011-03-21
U8800 Maintenance Manual Basic Version V1.1
Signal Failure
(W900MHz)
Measure VREG_RF
whether voltage is
normal？
Y
Measure whether two pins
of the U3201 are
connection？
Y
Replace U3202, check
whether it is normal？
N
Replace U3404, check
whether is normal？
N
Measure whether the
U3701 is normal？
Y
Replace U201
Huawei confidential. No spreading without permission.
the wrong RF parameter can cause the
N Replace the U301
N Replace the U3201
Y BT/CT
Y
N Replace the U3701
Internal
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