Huawei U8666 Manuals

Manuals and User Guides for Huawei U8666. We have 1 Huawei U8666 manual available for free PDF download: Maintenance Manual

Huawei U8666 Maintenance Manual

Huawei U8666 Maintenance Manual (70 pages)

Brand: Huawei | Category: Cell Phone | Size: 2.06 MB

Table of Contents

About this Document

3
- Change History
  3
- Table of Contents
  4
1 Product Introduction

6
- Appearance
  6
- Specifications
  6
2 Applicable Scope and Precautions

9
3 Exploded View

10
4 Components on the PCBA

12
5 Software Upgrade

14
- Upgrade Preparation
  14
- Upgrade Procedure
  14
6 Maintenance Tools

16
7 Disassembly Procedure

18
8 Assembly Procedure

23
9 Principles and Failure Analysis

27
- Block Diagram
  27
  - Function Description of the PCBA
    28
- Baseband Unit
  31
  - Power-On Management Circuits
    31
  - Charging Management Circuits
    35
- RF Unit
  36
  - RF Failure
    36
  - Gps
    39
  - Wi-Fi/Bluetooth/Fm Module
    39
- Peripheral Circuits
  40
  - Display
    40
  - Camera
    43
  - Usb
    45
  - Headset Jack
    46
  - Keys
    48
  - Status Indicator and Touch Key Backlight Circuits
    49
  - Battery Connector
    50
  - Accelerometer Circuit
    51
  - Compass
    51
  - Proximity and Illuminance Sensor
    52
  - Vibration Motor
    53
  - Receiver
    54
  - Microphone
    57
  - Touchscreen Panel
    58
  - SIM Card
    59
  - Microsd Card
    60
10 Solder Points on the PCB and BGA Chip

62
11 Functional Tests

67
- MMI Test
  67
- Voice Call Test
  70

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