Samsung SGH-X490 Service Manual

Also see for SGH-X490: User manual User guide

Samsung SGH-X490 Service Manual Manual pdf 21 page image

SAMSUNG Proprietary-Contents may change without noticeThis Document can not be used without Samsung's authorization5. Block Diagrams5-15-1. RF Solution Block Diagram100 kHz+fmodREFIN VC-TCXOGSMDCS/PCSI+fmodI-Q+Q-~~VAPCEPCOS GSM RX SAW FilterB7845 (2.0X1.4)IL=1.4dB typ 1.5dB maxRipple=0.5dB typ 0.6dB maxVcc_RF_VCODiscrete3 rd OrderLoop Filterfc = ?kHz삼성전기 TX VCOVOT1810F27KRA (6.0X5.0X1.7)GSM = 880 ~ 915MHz(Vt=0.5V ~ 3.0V )Tuning Sensitivity = 55±11MHz/VDCS = 1710 ~ 1785MHz(Vt=0.5V ~ 3.0V )Tuning Sensitivity = 115±23 MHz/VPout= 6.5±3 dBm typ.,Ic <= 30mAHarmonics <= -10dBcMicro Devices Quadband PAMRF3146 (7 X 7)GSM: Pout = 34.2 dBm , E = 55%DCS: Pout= 32.0 dBm , E = 55%RXONVcc_Tx_BURSTVBATHITACHI METAL ANT S/WESHS-C090TImax = 8 mAFreq (MHz) Loss(typ.)880 - 915 1.2 dB925 - 960 0.8 dB1710 -1910 1.5 dB1805 -1880 1.2dBAtten 2xfo : 43dB,26dB(GSM,DCS/PCS)3xfo : 40dB,26dB(GSM,DCS/PCS)ENCLKDATADCS/PCS S/WOFFSET Mixer input power-16dBm max, -22dBm minf compRF =26MHzPhilips TransceiverUAA3536Pins IA,IB,QA and QBV IQ : 1.25V typ . , 1.15V min , 1.35V maxV mod : 0.5V ppQUADDIVPFDCPVREG~Vcc_RF_LOFracNDIV1:1/2VREG26MHzVcc_REF(2.4V typ.)Vcc_SYNFE_SW1FE_SW23WBUSCTLREGPWRENGSM/DCS/PCSDIVQUADPFDCPf TXIF60MHz+ I OUT--+FESWONSYNONTXONGSM S/WPMUHVSVDD1 (1.35V min 2.95V max , 150mA )VBat (3.6V typ 3.0V min)V_MODERF1_VDDRF2_VDDRF1_VDDSRF2_VDDSVDD2 (1.35V min 3.45V max , 150mA )VDD3 (1.35V min 3.45V max , 100mA )VDD4 (1.35V min 3.45V max , 150mA )AVDD(1.35V min 2.65V max , 100mA )VCC_RX_TX (2.7V ,100mA )VCC_SYN (2.7V , 100mA )VCC_RF_VCO (2.7V , 100mA )VCC_CP (4.0V , 25mA )VCC_TX_BURST (2.7V , 100mA )PON_SYNTPON_TXIL=1.5dB typ 2.1dB maxRipple=0.5dB typ 1.0dB maxI OUTQ OUTQ OUTGSM_TX_MODE_SWVCC_RX_TXDCS/PCS_TX_MODE_SWInvertercircuitsPCS_RX_MODE_SWVc_GSM Vc_DCS Vc_PCS(2.7V) Ripple=0.5dB typ 1.0dB maxIL=1.4dB typ 2.1dB maxEPCOS DCS RX SAW FilterB7852 (2.0X1.4)EPCOS PCS RX SAW FilterB7851 (2.0X1.4)1930 -1990 1.2dBPCS: Pout= 32.0 dBm , E = 52%(2.7V)SEM