Table Of Contents - LG KE520 Service Manual

1. Introduction ..................................... 5
2. Performance .................................... 6
2.1 Product Name ......................................... 6
2.2 Supporting Standard ................................6
2.3 Main Parts : GSM Solution...................... 6
2.4 HW Feature..............................................7
2.5 Technical Specification ..........................12
3. Circuit Description........................ 17
3.1 General Description .............................. 17
3.2 RF Part.................................................. 17
3.3 Digital Baseband....................................24
3.4 Analog Baseband.................................. 32
3.5 WLAN + Bluetooth Module Interface .... 41
3.6 FM Radio Interface ................................45
4. TROUBLE SHOOTING .................. 47
4.1 RF Part Technical Brief......................... 47
4.2 RF Part Trouble shooting...................... 53
4.3 Bluetooth Trouble Shooting .................. 60
4.4 Baseband Part Troubleshooting ........... 65
4.5 LCD Display Trouble............................. 73
4.6 Camera Trouble Shooting..................... 79
4.7 Flash LED Trouble Shooting................. 85
4.8 SIM Detect Trouble Shooting................ 88
4.9 Slide Up/Down and Trouble Shooting... 91
4.10 Speaker/Receiver Trouble Shooting
(Common Path)................................... 93
4.11 Speaker/Receiver Trouble Shooting
(Acoustic Path).................................... 96
4.12 MIC Trouble Shooting ......................... 97
4.13 Ear-Mic Jack Detection
Trouble Shooting................................. 99
4.14 Ear-Mic Hook Detection
Trouble Shooting............................... 100
4.15 Ear-Mic Headset MIC Trouble
Shooting............................................ 101
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Only for training and service purposes

Table of Contents

5. Download..................................... 120
6. Block Diagram............................. 129
7. CIRCUIT DIAGRAM ..................... 141
8 BGA IC Pin Check .........................153
9. PCB LAYOUT ............................... 157
10. RF Calibration
11. Engineering Mode ......................171
12. EXPLODED VIEW &
- 3 -
4.16 Ear-Mic Headset HSOR/HSOL
Trouble Shooting................................102
4.17 FM-Radio Trouble Shooting...............105
4.18 Transflash Trouble Shooting..............106
4.19 Main Key Backlight LED Trouble
Shooting.............................................109
4.20 Slide Key Backlight LED Trouble
Shooting.............................................111
4.21 Vibrator Trouble Shooting ..................113
4.22 Wi-Fi Trouble Shooting ......................115
5.1 The purpose of downloading software 120
5.2 The Environment of Downloading
Software.............................................. 120
5.3 Download Procedure ...........................122
................................
10.1 What's the Rx Calibration? .............. 165
10.2 What's the Tx Calibration? .............. 165
10.3 Calibration program - HOT_KIMCHI 166
REPLACEMENT PART LIST ..... 175
12.1 EXPLODED VIEW ............................ 175
12.2 Replacement Parts
<Mechanic component>.................... 177
<Main component> ........................... 180
12.3 Accessory ......................................... 196
165
LGE Internal Use Only