Table Of Contents - LG U880 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.............................14
2.5 RSSI BAR ..............................................14
2.6 Battery BAR ...........................................14
2.7 Sound Pressure Level............................15
2.8 Charging ................................................16
3. TECHNICAL BRIEF ........................17
3.1 General Description ...............................17
3.2 GSM Mode...........................................201
3.2.1 GSM Receiverv................................20
3.2.2 GSM Transmitter..............................22
3.3 WCDMA Mode .......................................23
3.3.1 Receiver...........................................23
3.3.2 Transmitter.......................................25
3.4 Phase-locked Loop ................................26
3.4.1 UMTS Rx PLL (PLL2) ......................26
3.4.2 Transceiver PLL (PLL1) ...................27
3.5 Off-chip RF Components .......................28
3.5.1 Front End Module(U1006) ...............28
3.5.2 UMTS duplexer (FL1000) ................29
3.5.3 UMTS Power Amplifier (U1002).......29
3.5.4 Thermistor (RT1000)........................31
3.5.5 UMTS transmit power detector
(U1001) ............................................31
3.5.6 Dual band GSM power amplifier
(U1005) ............................................32
3.5.7 GSM transmit VCO (U1003) ............34
3.5.8 UMTS Rx RF filter (FL1001) ............34
3.5.9 VCTCXO (X1000) ............................35

Table Of Contents

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3.5.10 Bluetooth........................................35
3. BB Technical Description............. 37
3.6 Baseband(DBB/MSM6250)....................37
3.6.1 General Description .........................37
3.7 Hardware Architecture ...........................38
3.7.1 Block Diagram(MSM6250)...............39
3.8 Subsystem(MSM6250) ..........................40
3.8.1 ARM Microprocessor Subsystem.....40
3.8.2 UMTS Subsystem ............................40
3.8.3 GSM Subsystem ..............................40
3.8.4 RF Interface .....................................40
3.8.5 Serial Bus Interface(SBI) .................40
3.8.6 Wideband CODEC...........................41
3.8.7 Vocoder Subsystem.........................41
3.8.8 HKADC ............................................41
3.8.9 General-Purpose Input/Output
Interface ...........................................41
3.8.10 UART .............................................42
3.8.11 USB ...............................................42
3.9 External memory interface .....................43
3.10 H/W Sub System..................................44
3.10.1 RF Interface ...................................44
3.10.2 MSM Sub System ..........................46
3.10.3 Power Block ...................................50
3.10.4 Key Pad .........................................55
3.10.5 Camera Interface ...........................56
3.10.6 Folder ON/OFF Operation .............58
3.10.7 Camera Direction Detection...........59
3.10.8 Keypad Light ..................................60
3.10.9 LCD Module ...................................61
3.10.10 Display & LCD FPC Interface ......62
3.10.11 Audio and Sound .........................63
3.10.12 Trans Flash ..................................67
3.11 Main Features ......................................68
3.11.1 LG-U880(MUSE) Main features.....68
3.11.2 LG-U880 Main Components ..........69