Huawei U8950D Manuals

Manuals and User Guides for Huawei U8950D. We have 1 Huawei U8950D manual available for free PDF download: Maintenance Manual

Huawei U8950D Maintenance Manual

Huawei U8950D Maintenance Manual (101 pages)

Brand: Huawei | Category: Cell Phone | Size: 5.06 MB

Table of Contents

Table of Contents
3
1 Product Overview

5
- Appearance
  5
- Features
  5
2 Applicable Scope and Precautions

9
3 Exploded View and Components

10
- Exploded View
  10
- Components List
  11
4 Components on the PCBA

13
5 Software Upgrade

17
- Upgrade Preparation
  17
- Hardware Connection
  17
- Upgrade Using the Phone Driver
  18
- Troubleshooting Upgrade Failures
  23
6 Maintenance Tools

25
7 Disassembly Procedure

27
8 Assembly Procedure

32
9 Maintenance Records During Verification

36
- Maintenance Records on each Stage
  36
10 Principles and Failure Analysis

51
- Baseband Unit
  52
  - Startup Management Circuits
    52
  - Charging Management Circuits
    56
  - Clock Circuit
    63
  - Flash Memory Circuit
    65
- RF Unit
  69
  - Power Amplifier
    70
  - Troubleshooting Process
    71
- Peripheral Circuits
  74
  - Display
    74
  - Vibration
    77
  - Receiver and Speaker
    79
  - Microphone
    82
  - Headset
    85
  - SIM Card
    87
  - I/O Connector
    90
  - Microsd Card Connector
    91
  - FM and Bluetooth
    92
11 Solder Points on the PCB and BGA Chips

96
12 Functional Tests

100
- Keys
  100
- MMI Test
  100
- Voice Call Test
  101

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