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Only for training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION..................................................................... 3
1.1 Purpose ........................................................................................................3
1.2 Regulatory Information.........................................................................3
1.3 Abbreviations.............................................................................................5
2. PERFORMANCE...................................................................... 7
2.1 Product Name............................................................................................7
2.2 Supporting Standard..............................................................................7
2.3 Main Parts : GSM Solution.....................................................................7
2.4 HW Features ...............................................................................................8
2.5 SW Features............................................................................................. 10
2.6 HW SPEC. ................................................................................................. 13
3. TECHNICAL BRIEF................................................................ 19
3.1 GENERAL DESCRIPTION...................................................................... 19
3.2 GSM MODE .............................................................................................. 21
3.3 UMTS MODE............................................................................................ 23
3.4 GPS RECEIVER.......................................................................................... 26
3.5 LO GENERATION and DISTRIBUTION CIRCUIT............................ 26
3.6 OFF-CHIP RF COMPONENTS............................................................. 27
3.7 Digital Baseband(DBB/MSM7227T)............................................... 31
3.8 Hardware Architecture........................................................................ 32
3.9 Subsystem (MSM7227T)..................................................................... 34
3.10 Power Block........................................................................................... 37
3.11 External memory interface............................................................. 42
3.12 H/W Sub System.................................................................................. 44
3.13 Audio and sound ................................................................................ 51
3.14 Display..................................................................................................... 57
3.15 Camera Interface (5M Auto Focus).............................................. 59
3.16 Compass Sensor.................................................................................. 60
3.17 Motion Sensor...................................................................................... 61
3.18 Proximity Sensor................................................................................. 62
3.19 Vibrators (DC Motor).......................................................................... 63
3.20 Main Features....................................................................................... 64
4. TROUBLE SHOOTING .......................................................... 68
4.1 RF Component....................................................................................... 68
4.2 SIGNAL PATH ........................................................................................... 69
4.3 Checking TCXO Block........................................................................... 72
4.4 Checking FEM Block............................................................................. 74
4.5 Checking WCDMA Block .................................................................... 76
4.6 Checking GSM Block............................................................................ 87
4.7 GPS/WIFI/BT RF Component ............................................................ 95
4.8 GPS/WIFI/BT SIGNAL PATH ................................................................ 97
4.9 GPS/WIFI/BT Trouble shooting ........................................................ 98
4.10 Power ONTrouble Shooting.........................................................103
4.11 Charging Trouble shooting...........................................................106
4.12 3M AF Camera Trouble Shooting...............................................108
4.13 Main LCD Trouble Shooting .........................................................112
4.14 Proximity Sensor on/off Trouble Shooting.............................114
4.15 Motion Sensor on/offTrouble Shooting.................................116
4.16 Compass Sensor on/off Trouble Shooting .............................118
4.17 DC Motor Trouble Shooting.........................................................120
4.18 Audio Troble........................................................................................122
5. DOWNLOAD.......................................................................136
6. BLOCK DIAGRAM...............................................................155
7. CIRCUIT DIAGRAM ............................................................162
8. BGA PIN MAP ....................................................................171
9. PCB LAYOUT.......................................................................175
10. CALIBRATION...................................................................178
10.1 General Description.........................................................................178
10.2 Requirement.......................................................................................178
10.3 Setup for RF calibration..................................................................179
10.4 Tachyon Software Installation .....................................................179
10.5 Tachyon Start......................................................................................180
10.6 Overview of RF Calibration...........................................................185
11. HIDDEN MENU.................................................................189
12. EXPLODED VIEW & REPLACEMENT PART LIST .............195
12.1 EXPLODED VIEW................................................................................195
12.2 Replacement Parts...........................................................................196
12.3 Accessory.............................................................................................218
