Table of Contents
Advertisement
U8655
Maintenance Manual
PA_ON
H
L
PA_R
L
L
Issue 1.0 (2012-02-23)
W2100 transmission
failure
When the RF cable is not
inserted, are U3201's pin 1
and pin 2 connected?
Y
Are U3202's control signals
normal?
Y
Is the insertion loss
between U3304's pin 1 and
pin 3 approximately 1.1–1.4
dB?
Y
Is the insertion loss
Y
between U3302's pin 2 and
pin 9 approximately 0.6 dB?
Y
Is U3301's output 24 dB?
Y
Y
Does U3801's pin A7 have
output?
Check U401
NOTE
The following tables describe the working status of the WCDMA power amplifier.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
N
N
N
N
N
N
PA
ON
OFF
PA_R1
L
H
9 Principles and Failure Analysis
Check U3201
Check U3202 and
U401
Check U3304
Check U3302
Check U3301
Check U3801
MODE
HI Power
MI Power
32
Advertisement
Table of Contents
