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Only for training and service purposes LGE Internal Use Only
Table Of Contents
1.INTRODUCTION.................................................5
1.1Purpose...............................................................................................5
1.2RegulatoryInformation...............................................................5
1.3Abbreviations...................................................................................7
1.4DifferencetableofGB500Model.............................................8
2.PERFORMANCE..................................................9
2.1SupportingStandard....................................................................9
2.2MainParts:Solution......................................................................9
2.3H/Wfeatures...................................................................................10
2.4HWSpec. .........................................................................................12
3.BBCIRCUITTECHNICALBRIEF........................15
3.1FunctionalBlockDiagram.........................................................15
3.2BasebandProcessorIntroduction.........................................16
3.3PowermanagementIC..............................................................31
3.4PowerON/OFF...............................................................................39
3.5SIMInterface...................................................................................40
3.6T- Flashconnector.......................................................................41
3.7Memory............................................................................................42
3.8LCDDisplay.....................................................................................43
3.9LCDback-lightillumination......................................................44
3.10Batteryvoltagemonitor..........................................................45
3.11Audio...............................................................................................45
3.12Bluetooth/FM(BC7820)...........................................................48
3.135PINInterfaceconnector........................................................50
4.RFCIRCUITTECHNICALBRIEF........................51
4.1GeneralDescription.....................................................................51
4.2GSMPart...........................................................................................54
4.3GSMPowerAmplifierModule.................................................59
5.TROUBLESHOOTING ......................................60
5.1Troubleshootingtestsetup.....................................................60
5.2Powerontrouble..........................................................................61
5.3ChargingTrouble..........................................................................64
5.4SIMDetectTrouble.......................................................................66
5.5MicroSDTrouble..........................................................................69
5.6AudioTrouble.................................................................................71
5.7MicrophoneTrouble....................................................................75
5.8CameraTrouble.............................................................................79
5.9MainLCDTrouble.........................................................................82
5.10BluetoothTrouble......................................................................84
5.11TouchSensor................................................................................89
5.12RFComponent............................................................................92
5.13RFSIGNALPATH..........................................................................93
5.14TroubleshootingofGSMPart...............................................95
5.15TroubleShootingof WCDMAPart...................................105
6.DOWNLOAD...................................................111
6.1S/Wdownloadsetup...............................................................111
6.2Downloadprogramuserguide...........................................112
7.BLOCKDIAGRAM...........................................124
8.CIRCUITDIAGRAM ........................................125
9.BGAPinMap..................................................135
10.PCBLAYOUT.................................................135
11.RF CALIBRATION .........................................149
11.1TestEquipmentSetup...........................................................149
11.2CalibrationStep.......................................................................150
12.EXPLODEDVIEW&REPLACEMENT
PARTLIST ....................................................155
12.1EXPLODEDVIEW......................................................................155
12.2ReplacementParts..................................................................157
12.3Accessory...................................................................................181
