General Description | LG Electronics KS360 guide

3. TECHNICAL BRIEF

3.20 General Description

The RF transceiver is integrated in S-GOLDradio(PMB8888),which suppors quad-band operation for voice and data transfer applications. The whole transceiver function is integrated in main IC, PMB8888 provides 4 LNA inputs for RF receiving and two outputs for PAM input for High/Low band. A direct conversion receiver and a quad-band polar transmitter for GSM and EDGE with integrated PGA functionality.

Figure 23. PMB 8888 Function Block Diagram

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LG Electronics KS360 service manual General Description, PMB 8888 Function Block Diagram

Contents

KS360 Internal Use Only Editor Date Issue Contents of Changes Version Kim Jul Revised HistoryPage Table Of Contents Page Purpose Regulatory Information Pictures Interference and AttenuationElectrostatic Sensitive Devices CC-CV APCBER CLA PAM LGEOpll PCB ANT H/W FeatureFeature Comment HR/EFR/FR/AMR Technical specification EgsmGSM900/EGSM Description Specification Offset from Carrier kHz Description Specification DCS1800/PCS1900 Bit Error Ratio BER Class II 2.439% @-102dBmBER Class II 2.439% @-100dBm Rx Level Report accuracy Stmr General Performance RMS EVM DCS1800, PCS1900 Due to modulation Offset from carrierkHz Offset from carrierkHz Max. dBm 400 600 200 800 KS360 series Component Block diagram KS360 series Functional Block Diagram Baseband Processor BBP Introduction General Description Block Description Device Name Maker Remark External Devices connected to memory interfaceRF Interface Resource Interconnection Description UART0 Usart InterfaceADC channel Usif Gpio map Port Function Net Name Description #Keypad CIFD7 Cifresetgpio CamrstDIFRESET1GPIO Keyint Cifpclk Campclk Usifsclk Btvcxoen Usiftxdmtsr UartbttxUsifrxdmrst Uartbtrx #I2S1 DAI-PCM I2S1CLK0 Fcdprbn ResetnPoresetn / SCANOUT2 TOUT5 Touchint Power management IC Block Description Top level block diagram of the PMU Block of PMB8888 LDO Usage Charging 2V~3.74V 74V~3.64V 64V~3.45V 45V~3.35V Power ON/OFF Remote Power On SIM interface SIM Circuit SD mode Pin No Name Type Description Micro SD external memory Interface Memory Memory Circuit LCD Display Pin No Pin Name Description VCC1 ResetLCD-ID MLED5 Pin LCD connector circuit Keypad Switching & Scanning Keypad Configuration Circuit CLR Touch KEY Technical Brief Keypad back-light illumination Qwerty + MultiKeypad Backlight Circuit LCD back light illumination Charge-Pump Circuit ISPImage Signal Processor ISP & Camera Circuit Jtag & ETM interface connector Jtag & ETM Interface Circuit KS360 series Audio signal flow diagram as following diagram Audio Audio amplifier Microphone circuit Charging circuit Charging IC OVP Bluetoothcsr Bluetooth / FM Radio Circuit Diagram Technical Brief Bluetooth / FM Radio Block Diagram FM Radio 19 18pin Multi Media Interface connector KM380 series MMIPin Function Description 18PIN IO Connector Pin Multi port Circuit Diagram PMB 8888 Function Block Diagram General Description Gold Radio Circuit Diagram Receiver Block Diagram of S-GOLDradio Receiver part Transmitter part Transmitter Architecture Block Diagram RF synthesizer Dcxo Front End Module control Vbatt Power Amplifier ModulePin Mame Description Gsmin Main PCB component placement Main PCB Top Main PCB bottom Main PCB bottom placement MMI PAD KEY PCB Top Trouble shooting test setup Equipment setup Power on Trouble Check Points TP2 Trouble shooting Charging trouble 2V~3.75V75V~3.64V 3.64V~3.45V 3.45V~3.35V TP1 TP2 Main To Fpcb Connector LCD display trouble Signal is normal on Connectors combination Fpcb status Camera Trouble Start Receiver & Speaker trouble Speaker pin contact Audio amp soldering SUB Pmic soldering TP4 Microphone trouble MIC Ear-MIc Jack Detection trouble TP1 Connectors combination Vibrator trouble Check Vibrator Connector Combination Signal path is connected well TR is working properly Keypad back light trouble Check All of LEDs solder Check Vbat Check Battery Yes Power is working Socket soldering Proper SIM is used SIM & USD troubleSIM Check Points Soldered well? Yes Power is working Socket soldering Card detect is working USD Check Points Check Micro SD card voltage 2V9VMMC Touch trouble Touch Check Points TP4 Dome switch contacts Key coder IC soldering Qwerty Key troubleKey Check Points Domeswitch Waveform of Dcxo Trouble Shooting of Receiver Part Main PCB Bottom Dcxo Cicuit Checking Dcxo CircuitDcxo Dcxo Waveform Checking Mobile SW & FEM Egsm DCS PCS ANTSW1ANTSW2 Mobile SW FEM Control Signals ANT SW1 ANT SW2 Trouble Shooting of Transmitter Part See RX Part 1. Checking Dcxo Circuit Gsmk Checking Transceiver Output SignalsMode 8PSK Txlb Mode Gmsk TP1 Txlb Mode 8PSK TP1 Transceiver Output Gmsk Transceiver Output 8PSK Mode Palevel Txonpa Checking PAM Control SignalsPAM Control Signals PAM Mode Operation Gsmk Control Signal 8PSK Control Signal 100 Off FEM TX Control Logic Mobile SW & FEM Checking Points TX ModeChecking FEM & Mobile SW 101 TP1ANT SW1 TP2ANT SW2 102 S/W download setup Download & upgrade setup Preparation103 Download program user guide 104 Multi-Download Program SettingModel-Base 105 106 Circuit Diagram 18PIN IO Connector Hall Effect S/W108 Audio AMP SUB System & Signal Distributor 109 110 Qwerty KEY Camera Power Camera ConnectorSIM Connector Backup Battery Bluetoothcsr 2V62VIO 112 Main To Fpcb Connector Fpcb To Slide Connector 113 114 Right 115 Main Receiver 116 BGA IC pin check U102, PMB8888 117 BGA IC pin check U100, K5D1G12ACD-D075 118 BGA IC pin check U303, MAX9877 119 BGA IC pin check M600, BC5FM 120 PCB Layout 121 GSM RX 122 LD100~106 No MultiKey Backlight 123 124 LCD Connector CN100 No Power No Booting No Display 125 Touch Connector CN102 No Touch Sense CN100 126 Test Equipment Setup Calibration Step127 128 Adjust the number of times 129 130 Calibration data will be saved to the following folder 131 Normal Mode Ptest Mode 132 Stand-alone Test 133 Connected 134 Tx Test 135 Rx Test 136 BB Test MF Test 138 Exploded View & Replacement Part List 139 Assy Exploded View 140 Replacement Parts Mechanic component 141 Exploded View & Replacement Part List 142 143 Main component Is ordered by Sbom standard on Gcsc144 145 146 147 ECCH0000393 148 149 150 151 152 FILTER,EMI/POWER 153 154 155 156 157 158 159 160 161