Table Of Contents - LG L240 Service Manual

1. Introduction ..................................... 5
1.1 Purpose................................................... 5
1.2 Regulatory Information............................ 5
2. Performance .................................... 7
2.1 HW Feature............................................. 7
2.2 Technical Specification ........................... 9
3. Circuit Description........................ 14
3.1 General Description .............................. 14
3.2 RF Part.................................................. 14
3.3 Digital Baseband................................... 20
3.4 Analog Baseband.................................. 26
3.5 Bluetooth Interface................................ 34
4. TROUBLE SHOOTING .................. 37
4.1 RF Part Technical Brief......................... 37
4.2 RF Part Trouble shooting...................... 43
4.3 Bluetooth Trouble Shooting .................. 51
4.4 Baseband Part Troubleshooting ........... 55
4.5 LCD Display Trouble............................. 61
4.6 Camera Trouble Shooting..................... 65
4.7 MOD Key Trouble Shooting .................. 67
4.8 SIM Detect Trouble Shooting................ 71
4.9 Folder On/Off and Trouble Shooting..... 73
4.10 Speaker Trouble Shooting .................. 75
4.11 Receiver Trouble Shooting ................. 78
4.12 MIC Trouble Shooting ......................... 79
4.13 Transflash Trouble Shooting............... 81
4.14 Keypad Backlight LED Trouble
Shooting.............................................. 83
4.15 Vibrator Trouble Shooting ................... 85
4.16 Ear-Mic Jack Detection
Trouble Shooting..................................86
4.17 Ear-Mic Hook Detection
Trouble Shooting..................................87

Table of Contents

5. Downloading Software ................. 91
6. BLOCK DIAGRAM ......................... 97
7. CIRCUIT DIAGRAM ....................... 99
8. PCB LAYOUT ............................... 106
9. RF Calibration
12. EXPLODED VIEW &
- 3 -
4.18 Ear-Mic Headset MIC
Trouble Shooting..................................88
4.19 Ear-Mic Headset HSOR/HSOL
Trouble Shooting..................................89
5.1 The purpose of downloading software .. 91
5.2 The Environment of Downloading
Software................................................ 91
5.3 Download Procedure .............................93
...................................
9.1 RF Calibration Equipment Setup ....... 109
9.2 RF Calibration Procedure .................. 109
REPLACEMENT PART LIST ..... 113
12.1 EXPLODED VIEW ............................ 113
12.2 Replacement Parts
<Mechanic component>.................... 115
<Main component> ........................... 118
12.3 Accessory ......................................... 132
109