LG GS290 - Default Chapter; Table of Contents

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Only for training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION .................................................5
1.1 Purpose ............................................................................................... 5
1.2 Regulatory Information ............................................................... 5
1.3 Abbreviations ................................................................................... 7
2. PERFORMANCE ..................................................9
2.1 H/W Features .................................................................................... 9
2.2 Technical Specification ...............................................................11
3. TECHNICAL BRIEF ............................................17
3.1 GS290 Functional Block diagram ...........................................17
3.2 Baseband Processor (BBP) Introduction..............................18
3.3 Power management IC ..............................................................30
3.4. Power ON/OFF ..............................................................................35
3.5. SIM & uSD interface ....................................................................37
3.6. Memory ...........................................................................................39
3.7. LCD Display ....................................................................................40
3.8. Keypad Switching & Scanning ...............................................41
3.9. Keypad back-light illumination .............................................42
3.10. LCD back-light illumination ..................................................43
3.11. Audio ..............................................................................................44
3.13. charging circuit ..........................................................................46
3.14 FM radio & BLUETOOTH ..........................................................47
3.15. 5pin u-USB Interface connector..........................................51
3.16. General Description .................................................................54
3.17. Receiver part ...............................................................................56
3.18. Transmitter part .........................................................................57
3.19. RF synthesizer .............................................................................58
3.20. Front End Module control .....................................................59
3.21. Power Amplifier Module ........................................................60
3.22. PAM Schematic ..........................................................................61
4. TROUBLE SHOOTING ......................................62
4.1 Trouble shooting test setup .....................................................62
4.2 Power on Trouble ..........................................................................63
4.3 Charging trouble ..........................................................................66
4.4 LCD display trouble .....................................................................68
4.5 Camera Trouble .............................................................................70
4.6 Receiver & Speaker trouble ......................................................72
4.7 Microphone trouble ....................................................................75
4.8 Vibrator trouble .............................................................................77
4.9 Keypad back light trouble .........................................................79
4.10 SIM & uSD trouble ......................................................................81
4.11 Touch trouble...............................................................................85
4.12 Trouble shooting of Receiver part .......................................87
4.13 Trouble shooting of Transmitter part. ................................93
5. DOWNLOAD & S/W UPGRADE......................101
6. BLOCK DIAGRAM ...........................................112
7. CIRCUIT DIAGRAM ........................................113
8. BGA Pin Map ..................................................121
9. PCB LAYOUT ...................................................129
10.ENGINEERING MODE ...................................135
10.1. Test Equipment Setup .......................................................... 135
10.2. Calibration Step ...................................................................... 135
11. STAND ALONE TEST ....................................140
11.1 Test Program Setting ............................................................. 140
11.2 Tx Test ........................................................................................... 143
11.4 Rx Test .......................................................................................... 145
12. EXPLODED VIEW & REPLACEMENT
PART LIST ....................................................147
12.1 EXPLODED VIEW ...................................................................... 147
12.2 Replacement Parts.................................................................. 149