Kenwood_AT-300_serv维修手册含电器原理图

AUTOMATIC ANTENNA TUNERAT-300KENWOODDownloaded bySERVICE MANUALRadioAmateur.EU1991-1 PRINTED IN JAPANB51-8100-00(0)996Cabinet (TOP)Packing(A01-2001-08)(G53-0588-081>KENWOODCable connector(J42-0469-08)Cabinet (BOTTOM)Mounting hardware(A01-2002-08)(J21-4302-08)CONTENTSCIRCUIT DESCRIPTIONutputTuningMode Setting Block .........9Through Mode2CPU Standby Operation and Interface............10Tuning TostLC Tuning Circuit....12Interface ........2BLOCK DIAGRAM14Control Cable Terminals3DESCRIPTION OF COMPONENTSTuning Circuit Selection.3ANT Tuner Unit W02-1684-08 ......15Sensor Block ..........4PARTSFrequency Read Block…EXPLODED VIEW…20A/D Converter…1PC BOARD (COMPONENT SIDE VIEW)......21Digital Circuit Configuration..........SCHEMATIC DIAGRAM.23SPECIFICATIONS.................BACK COVER