LG B2000 Service Manual

Table Of Contents
1. INTRODUCTION..........................2
1.1 Purpose ...........................................2
1.2 Regulatory Information ....................2
1.3 Abbreviations ..................................4
2. PERFORMANCE ........................ 6
2.1 H/W Feature ...................................6
2.2 Technical Specification ..................8
3. TECHNICAL BRIEF ..................13
3.1 Transceiver ...................................13
3.2 Power Amplifier Module ..................19
3.3 13 MHz Clock ............................... 20
3.4 Power Supplies of RF circuits ........20
Digital Main Processor..................22
3.6 Analog Main & Power
Management Processor ................28
3.7 Display Interface ............................. 38
3.8 Radio Interface ..............................40
3.9 Keypad Switches and Scanning .... 41
3.10 Microphone ..................................42
3.11 Main Speaker ............................. 42
3.12 Headset interface ........................43
3.13 Key Back-light Illumination .......... 44
3.14 Vibrator........................................45
4. TROUBLE SHOOTING ............. 46
4.1 RX Trouble ................................... 46
4.2 TX Trouble ................................... 53
4.3 Power On Trouble .........................61
4.4 Charging Trouble........................... 63
4.5 Vibrator Trouble..............................65
4.6 LCD Trouble.................................. 67
4.7 Radio Trouble ................................69
4.8 Speaker Trouble .............................71
4.9 SIM card interface trouble ............ 74
4.10 Earphone Trouble .........................76
4.11 Key Backlight Trouble ..................78
4.12 Receiver Trouble ..........................80
4.13 Microphone Trouble .................... 82
4.14 RTC Trouble.................................84
4.15 Indication LED Trouble..................86
5. DOWNLOAD AND
CALIBRATION .......................88
5.1 Download .......................................88
5.2 Calibration .......................................93
6. BLOCK DIAGRAM.....................96
7. CIRCUIT DIAGRAM...................99
8. PCB LAYOUT .........................104
9. ENGINEERING MODE .............107
9.1 BB Test [MENU 1].........................108
9.2 RF Test [MENU 2].........................109
9.3 MF mode [MENU 3].......................110
9.4 Trace option [MENU 4] ..................111
9.5 Call timer [MENU 5] ......................111
9.6 Fact. Reset [MENU 6] ...................111
9.7 S/W version [MENU 7]...................111
10. STAND ALONE TEST.............112
10.1 Introduction ...............................112
10.2 Setting Method............................112
10.3 Means of Test ............................113
12. AUTO CALIBRATION ...........115
11.1 Overview.....................................115
11.2 Requirements..............................115
11.3 Menu and Settings ......................115
11.4 AGC............................................117
11.5 APC............................................117
11.6 ADC............................................117
11.7 Setting........................................117
11.8 How to do calibration...................117
12. EXPLODED VIEW &
REPLACEMENT PART LIST...119
12.1 Exploded View ............................119
12.2 Replacement Parts
<Mechanic component>...............121
<Main component>......................122
12.3 Accessory ....................................134

LG B2000 Specifications

General

Brand	LG
Model	B2000
Category	Cell Phone
Language	English