Table Of Contents - LG KC910 Service Manual

1. INTRODUCTION.................................. 5
1.1 Purpose ...................................................... 5
1.2 Regulatory Information ............................... 5
2. PERFORMANCE ..................................7
2.1 System Overview.........................................7
2.2 Usable environment.....................................8
2.3 Radio Performance......................................8
2.4 Current Consumption.................................15
2.5 RSSI BAR ..................................................16
2.6 Battery BAR ...............................................16
2.7 Sound Pressure Level ...............................17
2.8 Charging ....................................................18
3. TECHNICAL BRIEF............................19
3.1 GENERAL DESCRIPTION ........................19
3.2 GSM MODE...............................................21
3.3 UMTS MODE.............................................23
3.4 GPS MODE ...............................................26
3.5 LO GENERATION and DISTRIBUTION
CIRCUIT ....................................................27
3.6 OFF-CHIP RF COMPONENTS .................28
3.7 Digital Baseband (DBB/MSM6280) ...........37
3.8 Subsystem(MSM6280) ..............................40
3.9 Power Block...............................................49
3.10 External memory interface.......................55
3.11 H/W Sub System .....................................57
3.12 Feature List..............................................77
3.13 Multimedia Chip Interface ........................84
3.14 Touch Screen Interface ...........................91
3.15 Ambient Light Sensor Interface ...............92
3.16 Main features of KC910 ...........................93
3.16 Main Components of KC910....................94
4. TROUBLE SHOOTING.......................99
4.1 RF Component ..........................................99
4.2 SIGNAL PATH .........................................101
4.3 Checking TCXO Block .............................105
4.4 Checking Ant. Switch Module Block ........109
4.5 Checking UMTS Block.............................101
4.6 Checking GSM Block...............................124
4.7 WLAN/BT/FM Block.................................131
4.8 Power on trouble......................................137
4.9 SIM detect trouble....................................141
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Only for training and service purposes

Table Of Contents

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4.10 Key sense trouble ( KEYPAD ) ..............142
4.11 Keypad backlight trouble .......................145
4.12 Micro SD trouble ....................................147
4.13 Audio trouble..........................................148
4.14 Camera trouble ......................................163
4.15 Main LCD trouble...................................168
4.16 Touch Screen trouble ............................172
4.17 Ambient Light Sensor trouble ................173
5. DOWNLOAD.....................................174
5.1 Connecting to PC.....................................174
5.2 Select DZ Image Download mode ...........175
5.3 Choose Binary Image ..............................176
5.4 Choose the download style......................177
5.5 Start Downloading ...................................178
5.6 Check image downloading stateq............179
5.7 Finally Download Completed ...................180
6. BLOCK DIAGRAM ...........................181
1. System HW Block Diagram : Renoir Total
Block Diagram ...........................................181
2. System HW Block Diagram : RF Block......182
3. System HW Block Diagram (Detail) :
MEMORY...................................................184
7. CIRCUIT DIAGRAM..........................189
8. BGA IC PIN MAP..............................203
9. PCB LAYOUT ...................................207
10. Calibration......................................215
10.1 Usage of Hot-Kimchi..............................215
11. Test Mode .......................................218
12. EXPLODED VIEW & REPLACEMENT
PART LIST ..................................... 223
12.1 EXPLODED VIEW ................................ 223
122.2 Replacement Parts
<Mechanic component> ..................... 225
<Main component> ..............................229
12.3 Accessory ............................................. 255
LGE Internal Use Only