KENWOOD–TH-21-维修用说明书手册

10.00FKENWOODSERVICE MANUALTH-21A/AT/EBT-2,DC-21,EB-2,PB-21SC-8/8T.SMC-30,TU-62m FM HAND-HELD TRANSCEIVERCONTENTSCIRCUIT DESCRIPTION……2PACKlNG.............................................PARTS LIST,,·86PC BOARD VIEWSSWITCH UNIT(X41-1590-XX).....··········18TONE UNIT(X52.1270XX)(TH-21 E ONLY).·.·...·,.·19DTMF UNIT (TH-21AT ONLY)..........................19RF UNIT(X44-1630XX).·.·…··201 F UNIT(X481410-XX)....·,····2DISASSEMBLY,,,··,·…LEVEL DIAGRAM.…25ADJUSTMENT..26BT-2(AAA MANGANESE/ALKALINE BATTERY CASE)....····29EB-2(EXTERNAL C MANGANESE/ALKALINE BATTERY CASE)29PB-21Ni-Cd BATTERY,,..·..······29DC21(DC-DC CONVERTER)...···…30SC.8/8T (SOFT CASE).........30SMC-30 (SPEAKER MICROPHONE)..........................31TU-6(PROGRAMABLE TONE ENCODER)(TH21A/AT ONLY)···31WIRING ............................................32REFERENCE DATA,,·-··,················32巴SCHEMATIC DIAGRAM(TH21A/AT.····33SCHEMATIC DIAGRAM(TH21e).··....··············34BLOCK DIAGRAM35SPECIFICATIONS.,,,,,·,........·...·,,BACK COVERPhotograph shows TH-21AT type.