Table Of Contents - LG U8290 Service Manual

1. INTRODUCTION .............................. 6
1.1 Purpose................................................... 6
1.2 Regulatory Information............................ 6
2. PERFORMANCE.............................. 8
2.1 System Overview .................................... 8
2.2 Usable Environment................................ 9
2.3 Radio Performance ................................. 9
2.4 Current Consumption............................ 15
2.5 RSSI Bar ............................................... 15
2.6 Battery Bar ............................................ 15
2.7 Sound Pressure Level........................... 16
2.8 Charging ............................................... 17
3. TECHNICAL BRIEF ....................... 18
3.1 General Description .............................. 18
3.2 GSM Mode............................................ 21
3.2.1 GSM Receiver ................................ 21
3.2.2 GSM Transmitter............................. 24
3.3 WCDMA Mode ...................................... 25
3.3.1 Receiver.......................................... 25
3.3.2 Transmitter...................................... 28
3.4 LO Phase-locked Loop ......................... 29
3.4.1 UMTS Rx PLL (PLL2) ..................... 29
3.4.2 Transceiver PLL (PLL1) .................. 30
3.5 Off-chip RF Components ...................... 31
3.5.1 Antenna switch module................... 31
3.5.2 UMTS duplexer .............................. 31
3.5.3 UMTS Power Amplifier.................... 32
3.5.4 Thermistor....................................... 33
3.5.5 UMTS transmit power detector ....... 33
3.5.6 Dual band GSM power amplifier .... 34
3.5.7 GSM transmit VCO ......................... 36
3.5.8 UMTS Rx RF filter........................... 36

Table Of Contents

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3.5.9 GSM band Rx RF filter ................... 37
3.5.10 VCTCXO ....................................... 37
3.5.11 UMTS Rx VCO.............................. 37
3.5.12 Bluetooth....................................... 37
3. BB Technical Description............. 39
3.6 Digital Baseband................................... 39
3.6.1 General Description ........................ 39
3.7 Hardware Architecture .......................... 40
3.7.1 Block Diagram ................................ 41
3.8 Subsystem(MSM6250) ......................... 42
3.8.1 ARM Microprocessor Subsystem.... 42
3.8.2 UMTS Subsystem ........................... 42
3.8.3 GSM Subsystem ............................. 42
3.8.4 RF Interface .................................... 42
3.8.5 Serial Bus Interface(SBI) ................ 42
3.8.6 Wideband CODEC.......................... 43
3.8.7 Vocoder Subsystem........................ 43
3.8.8 HKADC ........................................... 43
3.8.9 Mode Select and JTAG Interfaces .. 43
3.8.10 General-Purpose Input/Output
Interface ........................................ 43
3.8.11 UART ............................................ 44
3.8.12 USB .............................................. 44
3.9 External memory interface ................... 45
3.10 H/W Subsystem .................................. 46
3.10.1 RF Interface .................................. 46
3.10.2 MSM Subsystem........................... 48
3.10.3 Power Block .................................. 51
3.10.4 Key Pad ........................................ 56
3.10.5 Camera Interface .......................... 57
3.10.6 Folder ON/OFF Operation ............ 59
3.10.7 Camera Direction Detection.......... 60
3.10.8 Keypad Light ................................. 61
3.10.9 Camera Light Flash ...................... 62