ETS2228 Maintenance Manual
All right reserved
Page 2, Total 43
Contents
Chapter 1 Overview ................................................................................................................................... 3
1.1
Brief Introduction of Product
............................................................................................... 3
1.2 Specifications of the Software and Hardware
.............................................................................. 4
Chapter 2 ETS2228 Principles................................................................................................................. 5
2.1 Principles
....................................................................................................................................... 5
2.1.1
ETS2228 principle structure
................................................................................................. 5
2.1.2 Detailed Introduction to Functional Circuit Unit
...................................................................... 6
Chapter 3 Detailed Introduction of Functional Module.............................................................................. 15
3.1 Power Part
（
including power supply and power management
）
............................................. 15
3.2 Base Band Part
............................................................................................................................ 20
3.3 Power Management Part
............................................................................................................ 20
3.4 RF Part
........................................................................................................................................ 23
Chapter4 Engineering Mode and Test Mode ............................................................................................. 29
4.1 Entrance to engineering mode and test mode
............................................................................. 29
Chapter 5 Troubleshooting ....................................................................................................................... 30
Chapter 6 Nam Programming...................................................................................................................... 40
Chapter 7 Appendix .................................................................................................................................... 41
7.1 Damageable Spare Part List
....................................................................................................... 41
7.2 Schematic Circuit Diagram
......................................................................................................... 42
7.3 Mainboard Structure Diagram
................................................................................................... 42
7.4 Test Point Location Diagram
...................................................................................................... 42
7.5 Abbreviations
.............................................................................................................................. 43
