Huawei u8800 - Rf Transmitting Failure; RF Transmitting Failure-Wcdma900 Mhz

U8800 Maintenance Manual Basic Version V1.1 Internal
2011-03-21
Huawei confidential. No spreading without permission. Page 56 of 61
9.17 RF Transmitting Failure
9.17.1 RF Transmitting Failure-WCDMA900MHz
Reference Figure 9-10& Figure 9-11
Signal Failure
(W900MHz)
Measure VREG_RF
whether voltage is
normal？
Replace U3202, check
whether it is normal？
CT/MT
Replace U3404, check
whether it is normal？
Replace U201
Y
N
Y
Y
Y
N
Replace Z3401, check
whether is normal？
Y
Measure whether the
U3701 is normal？
Replace the U3701
N
N
N
Replace the U301
Measure U3402, whether it is
normal？
N
Y
Replace the U3402