Contents
Contents ................................................................................................................................. 2
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 MT6582 circuit system................................................................................................... 5
2.3 Base band circuit ........................................................................................................... 6
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 ................................................................................................................. 14
3.9 Failure to identify SIM card .......................................................................................... 15
3.10 Failure to write IMEI................................................................................................... 15
3.11 Camera fail ................................................................................................................ 16
3.12 Failure to read T-flash card ....................................................................................... 17
4. BGA related GND or no function pad ............................................................................... 18
4.1 CPU and memory pin map .......................................................................................... 18
4.2 PMU pin map ............................................................................................................... 18
