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Cell Phone
U8950
Maintenance manual
Huawei U8950 Maintenance Manual
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Faqs
(80 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
1 Product Overview
Appearance
Features
2 Applicable Scope and Precautions
Applicable Scope
Precautions
How to Obtain Product and Repair Information
3 Exploded View and Components
Exploded View
Components List
4 Components on the PCBA
5 Software Upgrade
Upgrade Preparation
Hardware Connection
Upgrade Using the Phone Driver
Installing the Phone Driver
Performing a Normal Upgrade
Performing a Forcible Upgrade
Troubleshooting Upgrade Failures
6 Maintenance Tools
7 Disassembly Procedure
Disassembling a Bare Phone
Disassembling the Touchscreen
Disassembling the LCD
8 Assembly Procedure
9 Maintenance Records During Verification
Maintenance Records on each Stage
10 Principles and Failure Analysis
Baseband Unit
Startup Management Circuits
Charging Management Circuits
Clock Circuit
Flash Memory Circuit
RF Unit
Power Amplifier
Troubleshooting Process
Peripheral Circuits
Display
Vibration
Receiver and Speaker
Microphone
Headset
SIM Card
I/O Connector
Microsd Card Connector
FM and Bluetooth
11 Solder Points on the PCB and BGA Chips
12 Functional Tests
Keys
MMI Test
Voice Call Test
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U8950 Maintenance Guide
Prepared by
Bi Xiaotao and Zhang Shunzhi
Reviewed by
Wei Baoquan
Approved by
Zhao Xianfeng
HUAWEI
V1.0
Date
Date
Date
Huawei Technologies Co., Ltd.
All rights reserved.
2012.08.15
2012.08.17
2012.08.20
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Table of Contents
Troubleshooting
Performing a Forcible Upgrade
23
Troubleshooting Process
71
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This manual is also suitable for:
U8950d
U8950-1
U8950n-1
U8950-51
U8950n-51
U8650
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