LG KE990 Service Manual - Page 2

Table Of Contents - accessories

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Table Of Contents 1. INTRODUCTION 5 1.1 Purpose 5 1.2 Regulatory Information 5 2. PERFORMANCE 7 2.1 Supporting Standard 7 2.2 Main Parts : Solution 7 2.3 HW Features 8 2.4 HW SPEC 10 3. TECHNICAL BRIEF 15 3.1 General Description 15 3.2 GSM Mode 17 3.3 LO generation and distribution circuits...20 3.4 Off-chip RF Components 21 3.5 Digital Baseband (DBB/ESM6270) ........28 3.6 Subsystem(ESM6270 31 3.7 Power Block 38 3.8 External memory interface 43 3.9 H/W Sub System 45 3.10 Feature List 61 3.11 Multimedia Chip Interface 67 3.12 Touch Screen Interface 73 3.13 Main Features 74 3.14 Main Component 75 4. TROUBLE SHOOTING 81 4.1 RF Component 81 4.2 Main Component 82 4.3 Checking VCTCXO Block 83 4.4 Checking Front-End Module Block ........85 4.5 Checking GSM Block 88 4.6 Power on trouble 94 4.7 SIM detect trouble 99 4.8 Key sense trouble (KEYPAD 100 4.9 Keypad backlight trouble 102 4.10 Micro SD trouble 104 4.11 Audio trouble 105 4.12 Camera trouble 118 4.13 Main LCD trouble 121 4.14 Bluetooth trouble 124 4.15 Touch Screen trouble 126 5. DOWNLOAD 127 5.1 Introduction 127 5.2 Downloading Procedure 127 5.3 Troubleshooting Download Errors .......142 5.4 Caution 147 6. BLOCK DIAGRAM 148 6.1 GSM RF Block 148 6.2 Interface Diagram 150 7. Circuit Diagram 153 8. BGM Pin Map 163 9. PCB LAYOUT 169 10. Calibration & RF Auto Test Program (Hot Kimchi 173 10.1 Usage of Hot-Kimchi 173 11. EXPLODED VIEW & REPLACEMENT PART LIST ......177 11.1 EXPLODED VIEW 177 11.2 Replacement Parts

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- 3 -
1. INTRODUCTION
..............................
5
1.1 Purpose
...................................................
5
1.2 Regulatory Information
............................
5
2. PERFORMANCE
...............................
7
2.1 Supporting Standard
................................
7
2.2 Main Parts : Solution
................................
7
2.3 HW Features
............................................
8
2.4 HW SPEC
. .............................................
10
3. TECHNICAL BRIEF
........................
15
3.1 General Description
...............................
15
3.2 GSM Mode
.............................................
17
3.3 LO generation and distribution circuits...20
3.4 Off-chip RF Components
.......................
21
3.5 Digital Baseband (DBB/ESM6270)
........
28
3.6 Subsystem(ESM6270)
...........................
31
3.7 Power Block
...........................................
38
3.8 External memory interface
.....................
43
3.9 H/W Sub System
....................................
45
3.10 Feature List
..........................................
61
3.11 Multimedia Chip Interface
....................
67
3.12 Touch Screen Interface
........................
73
3.13 Main Features
......................................
74
3.14 Main Component
..................................
75
4. TROUBLE SHOOTING
...................
81
4.1 RF Component
.......................................
81
4.2 Main Component
....................................
82
4.3 Checking VCTCXO Block
......................
83
4.4 Checking Front-End Module Block
........
85
4.5 Checking GSM Block
.............................
88
4.6 Power on trouble
....................................
94
4.7 SIM detect trouble
..................................
99
4.8 Key sense trouble (KEYPAD)
..............
100
4.9 Keypad backlight trouble
......................
102
4.10 Micro SD trouble
................................
104
4.11 Audio trouble
......................................
105
4.12 Camera trouble
..................................
118
4.13 Main LCD trouble
...............................
121
4.14 Bluetooth trouble
................................
124
4.15 Touch Screen trouble
.........................
126
5. DOWNLOAD
.................................
127
5.1 Introduction
..........................................
127
5.2 Downloading Procedure
.......................
127
5.3 Troubleshooting Download Errors
.......
142
5.4 Caution
.................................................
147
6. BLOCK DIAGRAM
........................
148
6.1 GSM RF Block
.....................................
148
6.2 Interface Diagram
................................
150
7. Circuit Diagram
............................
153
8. BGM Pin Map
................................
163
9. PCB LAYOUT
................................
169
10. Calibration & RF Auto Test
Program (Hot Kimchi)
................
173
10.1 Usage of Hot-Kimchi
..........................
173
11. EXPLODED VIEW &
REPLACEMENT PART LIST
......
177
11.1 EXPLODED VIEW
.............................
177
11.2 Replacement Parts
<Mechanic component>
.....................
179
<Main component>
............................
183
11.3 Accessory
..........................................
203
Table Of Contents
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Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes