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
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