Table Of Contents - Huawei U8860 Maintenance Manual

Quick start manual (29 pages)

User manual (92 pages)

User manual (90 pages)

Table of Contents

U8860

Maintenance Manual

About This Document .................................................................................................................... ii

1 Product Introduction .................................................................................................................... 1

1.1 Appearance ....................................................................................................................................................... 1

1.2 Specifications ................................................................................................................................................... 1

2 Applicable Scope and Precautions ............................................................................................ 4

2.1 Applicable Scope .............................................................................................................................................. 4

2.2 Maintenance Precautions .................................................................................................................................. 4

2.3 How to Obtain Product and Maintenance Information .................................................................................... 4

3 Explosive View .............................................................................................................................. 5

4 Components on PCBA .................................................................................................................. 7

5 Software Upgrade ....................................................................................................................... 13

5.1 Upgrade Preparation ....................................................................................................................................... 13

5.2 Normal Upgrade ............................................................................................................................................. 13

5.3 Troubleshooting .............................................................................................................................................. 14

6 Maintenance Tools ...................................................................................................................... 15

7 Disassembly Procedure .............................................................................................................. 17

8 Assembly Procedure ................................................................................................................... 25

9 Principles and Troubleshooting ............................................................................................... 28

9.1 Block Diagram and Phone Introduction ......................................................................................................... 29

9.2 Baseband Unit ................................................................................................................................................ 33

9.2.1 Power-on Management Circuits ............................................................................................................ 33

9.2.2 Charging Management Circuits ............................................................................................................ 37

9.2.3 Clock Circuit ......................................................................................................................................... 39

9.2.4 Flash Memory Circuit ........................................................................................................................... 40

9.3 RF Unit ........................................................................................................................................................... 41

9.4 Peripheral Circuits .......................................................................................................................................... 44

9.4.1 Display .................................................................................................................................................. 44

9.4.2 Keypads ................................................................................................................................................ 46

9.4.3 Vibration ............................................................................................................................................... 48

Issue 1.0 (2011-11-14)

Huawei Proprietary and Confidential

Contents

iii