Contents
1. Introduction.....................................................................................................3
1.1 Objective....................................................................................................3
1.2 General Safety notice ...................................................................................3
1.3 Use Instruction ............................................................................................3
2. Technology summarize .....................................................................................4
2.1 Description of main board component map .....................................................4
2.2 MT6589 circuit system.................................................................................6
2.3 Base band circuit .........................................................................................7
3. Trouble Shooting .............................................................................................8
3.1 Fail to startup/power on................................................................................8
3.2 Fail to charge ..............................................................................................9
3.3 Fail to display ...........................................................................................10
3.4 Fail to call................................................................................................. 11
3.5 Speaker no sound....................................................................................... 12
3.6 Earphone fail.............................................................................................13
3.7 Vibrator fail ..............................................................................................14
3.8 Side key fail..............................................................................................15
3.9 Failure to identify SIM card ........................................................................16
3.10 Camera fail ............................................................................................. 17
3.11 Failure to read T-flash card........................................................................18
4. BGA related GND or no function pad...............................................................19
4.1 CPU and memory pin map..........................................................................19
4.2 PMU pin map............................................................................................19
4.3 WIFI .......................................................................................................................20
4.4 TRANSEIVER.......................................................................................................20
