I
Contents
1 OVERVIEW ...................................................................................................................................................2
1.1 RANGE OFAPPLICATION................................................................................................................................2
1.2 SAFETY PRECAUTION.................................................................................................................................... 2
1.3 MAINTENANCE SERVICE................................................................................................................................ 2
2 EXTERNAL VIEW AND LED INDICATOR....................................................................................................3
2.1 EXTERNAL VIEW ...........................................................................................................................................3
2.2 LED INDICATOR............................................................................................................................................4
3 CIRCUIT DESCRIPTION ..............................................................................................................................4
3.1 CIRCUIT DIAGRAM......................................................................................................................................... 4
3.2 RF CIRCUIT.................................................................................................................................................. 5
3.3WI-FI/GPS CIRCUIT......................................................................................................................................5
3.4 BASEBAND CIRCUITS ....................................................................................................................................6
3.4.1 Power Supply Circuit...............................................................................................................................6
3.4.2 Audio Frequency Circuit ..........................................................................................................................6
3.4.3 SIM Card Interface Circuit.......................................................................................................................7
3.4.4 MIC Circuit............................................................................................................................................... 7
3.4.5 Key Circuit...............................................................................................................................................8
3.4.6 LCM Circuit.............................................................................................................................................. 9
4 FUNCTIONS AND PARAMETERS ............................................................................................................... 9
4.1 BASIC FUNCTIONS ........................................................................................................................................9
4.2ADVANCED FUNCTIONS ...............................................................................................................................10
4.3 PARAMETER SETTINGS................................................................................................................................ 10
5. DISASSEMBLY............................................................................................................................................11
5.1 INSTALLING/UNINSTALLING THE BATTERY......................................................................................................11
5.2 INSTALLING/UNINSTALLING THE ANTENNA .....................................................................................................11
5.3 INSTALLING/UNINSTALLING BELT CLIP.......................................................................................................... 12
5.4 DISASSEMBLING ALUMINUM-ALLOY HOLDER AND COMPONENTS OF MAIN PART.............................................13
5.5 DETACHING MAIN BOARD FROM ALUMINUM-ALLOY HOLDER.........................................................................14
6 DEBUGGING............................................................................................................................................... 18
6.1 PREPARATION.............................................................................................................................................18
6.2 INDEX VERIFICATION ................................................................................................................................... 18
6.2.1 Frequency Bands .................................................................................................................................. 18
6.2.2 Performance Indexes ............................................................................................................................ 19
7 TECHNICAL SPECIFICATIONS ................................................................................................................. 20
8 DEVICES FOR MAINTENANCE AND TEST..............................................................................................21
9 TROUBLESHOOTING ................................................................................................................................21