LG PRADA KE850 - Default Chapter; Table of Contents

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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 KE850 Component Block diagram.........19
3.2 Baseband Processor (BBP)
Introduction ............................................18
3.3 Power management IC ..........................31
3.4 Power ON/OFF ......................................37
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 ...............44
3.10 LCD back-light illumination ..................45
3.11 Battery current consumption monitor...47
3.12 JTAG & ETM interface connector ........47
3.13 Audio....................................................48
3.14 Multi port switch ...................................50
3.15 USB charging circuit ............................52
3.16 FM radio ...............................................53
3.17 BLUETOOTH.......................................54
3.18 Micro SD external memory card slot....58
3.19 18pin Multi Media Interface connector.60
3.20 Touchpad Interface..............................62
3.21 General Description .............................63
3.22 Receiver part........................................65
3.23 Transmitter part....................................66
3.24 RF synthesizer.....................................67
3.25 VCTCXO..............................................67
3.26 Front End Module control.....................68
3.27 Power Amplifier Module.......................69
3.28 Mode Selection ....................................70
3.29 PAM Schematic ...................................70
4. PCB layout......................................71
4.1 Main & Sub PCB component
placement ..............................................71
5. Trouble shooting............................75
5.1 Trouble shooting test setup....................75
5.2 Power on Trouble...................................75
5.3 Charging trouble ....................................79
5.4 LCD display trouble................................81
5.5 Camera Trouble.....................................83
5.6 Receiver & Speaker trouble...................85
5.7 Microphone trouble ................................87
5.8 Vibrator trouble ......................................89
5.9 Keypad back light trouble.......................91
5.10 SIM card trouble...................................93
5.11 MicroSD trouble ...................................95
5.12 Touch pad trouble................................97
5.13 RF part Trouble Shooting.....................98
6. Download & S/W upgrade...............114
6.1 S/W download setup............................114
6.2 Download program user guide.............115
7. CIRCUIT DIAGRAM ......................119
8. PCB LAYOUT................................125
9. RF Calibration ..............................139
9.1 Test Equipment Setup .........................139
9.2 Calibration Steps..................................139
10. Stand along ................................145
10.1 Test Program Setting.........................145
10.2 Tx Test...............................................147
10.3 Rx Test...............................................148
11. ENGINEERING MODE ................149
12. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 151
12.1 Exploded View .................................. 151
12.2 Replacement Parts ............................153
12.3 Accessory ......................................... 172
Table Of Contents