© 2005-1 PRINTED IN JAPANB51-8710-00 (N) 556VHF FM TRANSCEIVERTK-2180SERVICE MANUALGENERAL .................................................................. 2SYSTEM SET-UP ...................................................... 2REALIGNMENT ......................................................... 3DISASSEMBLY FOR REPAIR ................................... 6CIRCUIT DESCRIPTION ............................................ 7SEMICONDUCTOR DATA ...................................... 13COMPONENTS DESCRIPTION .............................. 14PARTS LIST ............................................................. 16EXPLODED VIEW .................................................... 25PACKING ................................................................. 26ADJUSTMENT ........................................................ 27TERMINAL FUNCTION ........................................... 39PC BOARDDISPLAY UNIT (X54-3470-11) ............................ 42TX-RX UNIT (X57-6932-71) ................................ 46SCHEMATIC DIAGRAMDISPLAY UNIT (X54-3470-11) ............................ 50TX-RX UNIT (X57-6932-71) ................................ 52BLOCK DIAGRAM ................................................... 60LEVEL DIAGRAM .................................................... 62OPTIONAL ACCESSORIESKNB-31A/32N/33L .............................................. 63KSC-32 ................................................................. 63SPECIFICATIONS ................................. BACK COVERCONTENTSCabinet assy(A02-3848-03)Knob (PTT)(K29-9302-23)Packing(G53-1686-01)Button knob (Side)(K29-9303-03)Front glass(B10-2764-02)Helical antenna(KRA-22 : Option)Knob (Volume)(K29-9304-03)Knob (CH selector)(K29-9305-03)Does not come with antenna.Antenna is available as an option.E VersionThis product uses Lead Free solder.