G700-U10 Smartphone
Maintenance Manual
10 Circuit and Failure Analysis
Issue 1.0 (2013-07-22)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
70
Troubleshooting Process
Figure 10-44
Troubleshooting receiver failures
Receiver failure
Is the receiver
normal?
Replace the receiver
Y
Is the receiver circuit
normal?
Clear faults on the
circuit
Y
N
N
Resolder or
replace U401
Circuit Signals
Table 10-13
Circuit signals of this section
Signal
Description
Reference Value or
Waveform
HSN
Differential input's negative
electrode
Analog differential signal
HSP
Differential input's positive
electrode
Analog differential signal