Huawei u8800 - RF Transmitting Failure-Wcdma2100 Mhz

U8800 Maintenance Manual Basic Version V1.1 Internal
2011-03-21
Huawei confidential. No spreading without permission. Page 58 of 61
9.17.2 RF Transmitting Failure-WCDMA2100MHz
Reference Figure 9-10& Figure 9-11
Signal Failure
(W2100MHz)
Measure VREG_RF
whether voltage is
normal？
Replace U3202, check
whether it is normal？
CT/MT
Replace U3304, check
whether it is normal？
Replace U201
Y
N
Y
Y
Y
N
Replace U3301, check
whether is normal？
Y
Measure whether the
U3701 is normal？
Replace the U3701
N
N
N
Replace the U301
Measure U3302, whether it is
normal？
N
Y
Replace the U3402