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U8815
Maintenance manual
Figure 9-17 Flash Memory Circuit Diagram 3 - Huawei U8815 Maintenance Manual
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User manual
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Contents
Table of Contents
Troubleshooting
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Table of Contents
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U8815
Maintenance Manual
9 Principles and Failure Analysis
Figure 9-17 Flash memory circuit diagram 3
Issue 1.0 (2012-02-13)
Huawei Proprietary and Confidential
34
Copyright © Huawei Technologies Co., Ltd.
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Table of Contents
Troubleshooting
Figure 9-3 Troubleshooting process for no current
33
Figure 9-4 Troubleshooting process for weak current
34
Charging Management Circuits
35
Figure 9-10 Troubleshooting process for charging failures
38
Troubleshooting
49
Figure 9-27 Troubleshooting process for receiving failure
50
Figure 9-28 Troubleshooting process for transmission failure
52
Figure 9-32 Troubleshooting process for no LCD display
56
Call Transmission
62
Figure 9-43 Troubleshooting process for sound failure
65
Figure 9-45 Troubleshooting process for no sound from the headset failure
67
I/O Connector
69
Figure 9-50 Troubleshooting process for micorSD card read failure
72
Figure 9-54 Troubleshooting process for FM radio failure
74
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