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1. INTRODUCTION ...............................7
1.1 Purpose .................................................. 7
1.2 Regulatory Information............................ 7
1.3 ABBREVIATION ..................................... 9
2. PERFORMANCE .............................11
2.1 H/W Features.........................................11
2.2 Technical specification...........................12
3. TECHNICAL BRIEF ........................19
3.1 KE770 Component Block diagram.........20
3.2 Baseband Processor (BBP)
Introduction ............................................21
3.3. Power management IC .........................32
3.4. Power ON/OFF .....................................38
3.5. SIM interface.........................................39
3.6. Memory .................................................40
3.7. LCD Display ..........................................41
3.8. Keypad Switching & Scanning..............42
3.9. Keypad back-light illumination ..............43
3.10. LCD back light illumination..................43
3.11 Battery current consumption monitor ...45
3.12 JTAG & ETM interface connector ........45
3.13. Audio...................................................46
3.14. Battery charging/ USB charging circuit49
3.15. BLUETOOTH ......................................50
3.16. Micro SD external memory card slot...55
3.17. 18pin Multi Media Interface connector 57
3.18. General Description ............................59
3.19. Receiver part.......................................61
3.20. Transmitter part...................................62
3.21. RF synthesizer ....................................63
3.22. VCTCXO .............................................63
3.23. Front End Module control....................64
3.24. Power Amplifier Module ......................65
4. PCB layout......................................66
4.1 Main & Sub PCB component
placement ..............................................66
5. Trouble shooting............................68
5.1 Trouble shooting test setup....................68
5.2 Power on Trouble...................................69
5.3 Charging trouble ....................................72
5.4 LCD display trouble................................75
5.5 Camera Trouble .....................................76
5.6 Receiver & Speaker trouble ...................78
5.7 Microphone trouble ................................80
5.8 Vibrator trouble ......................................82
5.9 Keypad back light trouble.......................84
5.10 SIM card trouble...................................85
5.11 MicroSD trouble ...................................87
5.12 RF PART TROUBLESHOOTING ........89
6. Download & S/W upgrade.................98
6.1 S/W download setup..............................98
6.2 Download program user guide...............99
7. CIRCUIT DIAGRAM ......................107
8. PCB LAYOUT ................................112
9. RF Calibration...............................117
9.1 Test Equipment Setup .........................117
9.2 Calibration Steps..................................117
10. Stand-alone Test ........................121
10.1 Test Program Setting .........................121
11. ENGINEERING MODE ................124
12. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 125
12.1 Exploded View .................................. 125
12.2 Replacement Parts ............................127
12.3 Accessory ......................................... 143
Table Of Contents