Huawei Y300 Maintenance Manual page 73

Y300 Maintenance Manual
Figure 9-47 Circuit diagram of the SIM card (2)
Analysis
The PM8029 provides input and output signals to control the SIM card port.
Troubleshooting
Fault symptom: The Y300 fails to detect the USIM/SIM card.
Handling: Check that the USIM/SIM card slot is normal. Troubleshoot the fault according to
the process shown in Figure 9-48.
Issue 1.0 (2013-01-24) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
9 Principles and Failure Analysis
68