Table Of Contents - LG G5200 Service Manual

1. INTRODUCTION
1.1 Purpose .................................................. 4
1.2 Regulatory Information .......................... 4
A. Security .............................................. 4
B. Incidence of Harm .............................. 4
C. Changes in Service ............................ 4
D. Maintenance Limitations .................... 4
E. Notice of Radiated Emissions ............. 5
F. Pictures .............................................. 5
G. Interference and Attenuation ............. 5
H. Electrostatic Sensitive Devices .......... 5
1.3 Abbreviations ......................................... 6
2. PERFORMANCE
2.1 H/W Feature ........................................... 8
2.2 Technical Specification .......................... 9
3. TECHNICAL BRIEF
3.1 General Descreption ........................... . 13
3.2 Receiver ............................................... 13
A. RF front end ..................................... 14
B. Demodulator and
baseband processing ...................... 14
C. DC Offset Compensation ................ 14
3.3 Transmitter Part ................................... 15
A. IF Modulator ................................... . 15
B. OPLL ............................................... 16
C. Synthesizer ...................................... 16
D. TX APC Part .................................... 17
E. Power Amplifier ................................ 17
3.4 13 MHz Clock ...................................... 18
3.5 Power Supplies and Control Signals .... 18
3.6 Digital Main Processor ......................... 19
3.7 Analog Main Processor ........................ 24
3.8 Power Management .............................. 26
3.9 Memories .............................................. 28

Table Of Contents

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3.10 Display and Interfaces ........................ 28
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3.11 Keypad Switches and Scanning .......... 29
3.12 Microphone ......................................... 30
3.13 Earpiece ............................................. 31
3.14 Hands-free Interface .......................... 32
3.15 Headset Jack Interface ....................... 32
3.16 Key Back-light Illumination .................. 32
3.17 LCD Back-light Illumination ................ 33
3.18 Multi-Color LED Illumination .............. 33
3.19 Speaker & MIDI IC ............................. 34
4. TROUBLE SHOOTING
4.1 RF Components ................................. 35
4.2 Tx Trouble .......................................... 44
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4.3 Power on Trouble ............................... 60
4.4 Charging Trouble ............................... 62
4.5 LCD Trouble ....................................... 64
4.6 Receiver Trouble . ............................... 66
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4.7 Speaker Trouble ................................. 69
4.8 Mic Trouble .......................................... 72
4.9 Vibrator Trouble ................................. 75
4.10 Backlight Trouble ............................. 77
4.11 Folder on/off Trouble ........................ 79
4.12 SIM Detect Trouble .......................... 81
4.13 Earphone Trouble ............................ 83
4.14 HFK Trouble ..................................... 87
5. ASSEMBLY INSTRUCTION
5.1 Disassembly ....................................... 95
6. DOWNLOAD
6.1 Download Setup ............................... 102
6.2 Download Procedure ........................ 103
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............ 95
....................................... 102
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