Blu DASH 3.5, Руководство по обслуживанию

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Contents
Contents ... ....................................................................................................................................... 3
1. Introduction ... .............................................................................................................................. . 4
1.1 Objective ... ........................................................................................................................... .. 4
1.2 General Safety notice ... ........................................................................................................ . 4
1.3 Use Instruction ... .................................................................................................................. .. 4
2. Technology summarize ... ......................................................................................................... ... 5
2.1 Description of main board component map ... ...................................................................... . 5
2.2 MSM7225A circuit system ... .................................................................................................. 7
2.3 Base band circuit ... .............................................................................................................. .. 8
2.4 Power Management circuit ... ............................................................................................... .. 9
2.5 BT/FM circuit ... ...................................................................................................................... 11
2.6 RF circuit ... ............................................................................................................................ 11
3. Trouble Shooting ... ..................................................................................................................... 12
3.1 Fail to startup/power on ... ..................................................................................................... 12
3.2 Fail to charge ... ..................................................................................................................... 13
3.3 Fail to display ... ..................................................................................................................... 14
3.4 Fail to call ... ........................................................................................................................... 15
3.5 Speaker no sound ... ............................................................................................................. 16
3.6 Earphone fail ... ...................................................................................................................... 17
3.7 Vibrator fail ... ......................................................................................................................... 19
3.8 Side key fail ... ........................................................................................................................ 19
3.9 Failure to identify SIM card ... ................................................................................................ 20
3.10 Failure to identify SIM card ... .............................................................................................. 20
3.11 Camera fail ... ....................................................................................................................... 21
3.12 Failure to read T-flash card ... ............................................................................................. 22
4. BGA related GND or no function pad ... ..................................................................................... 23
4.1 CPU and memory pin map ... ................................................................................................ 23
4.2 PMU pin map ... ..................................................................................................................... 24
4.3 BT/FM/WIFI pin map ... ......................................................................................................... 25