Samsung SF3000 Service Manual

Also see for SF3000: Operator's guide

Contents

5-10 Samsung ElectronicsCircuit Description5-4-1. Transmit CircuitThis circuitry controls transmission of analog signalsfrom the MODEM. Output voltage from theMODEM is buffered through the LIU board and OPamp after signal smoothing and filtering, and finallyoutput to the line.5-4-2. Receive CircuitIn receive mode, analog signals from the LIU boardare transferred to RX IN through the BPF andsmoothing filter.5-5. Image Processor / Motor Driver (SDIP4)•Scan driver generates the control signals to acquire the document data from the scanner and to operate theImage Processor.•Motor driver generates the control signals to drive the Tx-Motor according to programmed motor speed.DATA MEMORYCPUDMA ControllerSCAN/ MOTORDRIVERIMAGEPROCESSORHALF FLASH ADCSCANNERDOCUMENT IMAGEADDR-BUSDATA-BUSADDR-BUSDATA-BUSCLK_NINECLK_PIXLINE_PERIODAGC_PERIODADSAMPLESICLKICLKI_ΦRTx_A_Tx_B_Tx_A_Tx_B_TRDMAACKTRDMAREQB-BITVIDEO SIGNAL(analog)[SDIP4]Figure 5-7 Block Diagram of Scanner Control Function