Casio TE-2200 Service Manual

Contents

— 48 —[ 24 ] COM (RS232C) batch test[Function]This is the RS232C port batch test.The loop back test for RS232C port is performed by making the connection shown in the figure.When performing this test, fix loop back connectors to all COM ports.[Operation]Operation : 4 0 SUBTOTALBaud rate: COM1: 19.2kbps, COM 2 : 9600 bpsCheck time: one time (stable)[Print]C O M B A T C H 4 0R T S 1 = 1 – – > C T S 1 = 0 O KD T R 1 = 1 – – > D S R 1 = 0 O KD T R 1 = 1 – – > C D 1 = 0 O KD T R 1 = 1 – – > C I 1 = 0 O KR T S 1 = 0 – – > C T S 1 = 0 O KD T R 1 = 0 – – > D S R 1 = 0 O KD T R 1 = 0 – – > C D 1 = 0 O KD T R 1 = 0 – – > C I 1 = 0 O KT x D – – > R x D O KR T S 2 = 1 – – > C T S 2 = 0 O KD T R 2 = 1 – – > D S R 2 = 0 O KR T S 2 = 0 – – > C T S 2 = 0 O KD T R 2 = 0 – – > D S R 2 = 0 O KT x D – – > R x D O KE N D 4 0COM 1 test resultCOM 2 test resultFigure : RS232C port connectionoutputs "1" "0" from the output terminal and checks the input terminal.TxDRxDCTSRTSDTRDSRCDCITxDRxDCTSRTSDTRDSRCOM1 COM2