Mic ETS2228 User Manual Page 1

ETS2228 Maintenance Manual All right reserved Page 1, Total 43 ETS2228 Maintenance Manual

ETS2228 Maintenance Manual All right reserved Page 10, Total 43 Figure 6 Hands-free Interf

ETS2228 Maintenance Manual All right reserved Page 11, Total 43 Figure 7 LCD Hardware Inte

ETS2228 Maintenance Manual All right reserved Page 12, Total 43 6~13 DATA BUS DB0~ DB7 14

ETS2228 Maintenance Manual All right reserved Page 13, Total 43 Figure 10 keypad implements

ETS2228 Maintenance Manual All right reserved Page 14, Total 43 Input power level conversi

ETS2228 Maintenance Manual All right reserved Page 15, Total 43 Figure 4 Data receiving sig

ETS2228 Maintenance Manual All right reserved Page 16, Total 43 Figure16 External power

ETS2228 Maintenance Manual All right reserved Page 17, Total 43 Figure 6 TL494 The differ

ETS2228 Maintenance Manual All right reserved Page 18, Total 43 Figure19 Anti-reverse-ins

ETS2228 Maintenance Manual All right reserved Page 19, Total 43 Figure 7 Second-

ETS2228 Maintenance Manual All right reserved Page 2, Total 43 Contents Chapter 1 Overvi

ETS2228 Maintenance Manual All right reserved Page 20, Total 43 PM6610 PIN NO. Function De

ETS2228 Maintenance Manual All right reserved Page 21, Total 43 Signal direction Signal na

ETS2228 Maintenance Manual All right reserved Page 22, Total 43 which produces power chip I

ETS2228 Maintenance Manual All right reserved Page 23, Total 43 O RESIN-N PM6610→MSM6000 Su

ETS2228 Maintenance Manual All right reserved Page 24, Total 43 Figure 8 RF receiving unit

ETS2228 Maintenance Manual All right reserved Page 25, Total 43 Table 9 RF emission unit

ETS2228 Maintenance Manual All right reserved Page 26, Total 43 Table 10 PLL circuit RX-QP

ETS2228 Maintenance Manual All right reserved Page 27, Total 43 3.5 Parameter Indices 1 .Pe

ETS2228 Maintenance Manual All right reserved Page 28, Total 43 Reference source signal ind

ETS2228 Maintenance Manual All right reserved Page 29, Total 43 Chapter4 Engineering Mod

ETS2228 Maintenance Manual All right reserved Page 3, Total 43 Chapter 1 Overview 1.1

ETS2228 Maintenance Manual All right reserved Page 30, Total 43 Chapter 5 Troubleshootin

ETS2228 Maintenance Manual All right reserved Page 31, Total 43 2、Initialization fault main

ETS2228 Maintenance Manual All right reserved Page 32, Total 43 3、Key-press fault maintenan

ETS2228 Maintenance Manual All right reserved Page 33, Total 43 4、LCD display fault mainten

ETS2228 Maintenance Manual All right reserved Page 34, Total 43 5、Hands-free fault maintena

ETS2228 Maintenance Manual All right reserved Page 35, Total 43 6、Charging fault maintenanc

ETS2228 Maintenance Manual All right reserved Page 36, Total 43 7、Data service fault mainte

ETS2228 Maintenance Manual All right reserved Page 37, Total 43 （2）RF Processing Module Fau

ETS2228 Maintenance Manual All right reserved Page 38, Total 43 2、RF receiving channel faul

ETS2228 Maintenance Manual All right reserved Page 39, Total 43 3、RF emission channel fault

ETS2228 Maintenance Manual All right reserved Page 4, Total 43 1.2 Specifications of the So

ETS2228 Maintenance Manual All right reserved Page 40, Total 43 Chapter 6 Name Programming

ETS2228 Maintenance Manual All right reserved Page 41, Total 43 Chapter 7 Appendix 7.1 Dama

ETS2228 Maintenance Manual All right reserved Page 42, Total 43 12070006 TCXO,19.2MHz,2.8V

ETS2228 Maintenance Manual All right reserved Page 43, Total 43 7.5 Abbreviations Abbrevia

ETS2228 Maintenance Manual All right reserved Page 5, Total 43 Chapter 2 ETS2228 Prin

ETS2228 Maintenance Manual All right reserved Page 6, Total 43 board is Terminal Communicat

ETS2228 Maintenance Manual All right reserved Page 7, Total 43 Figure 2 Powe

ETS2228 Maintenance Manual All right reserved Page 8, Total 43 Signal Modules Function De

ETS2228 Maintenance Manual All right reserved Page 9, Total 43 Figure 4 Handset MIC Circui