Kenwood TK-2118 Service Manual

Contents

2TK-2118TK-260 :K, K2INTRODUCTIONSCOPE OF THIS MANUALThis manual is intended for use by experienced techniciansf a m i l i a r w i t h s i m i l a r t y p e s o f c o m m e r c i a l g r a d ecommunications equipment. It contains all required serviceinformation for the equipment and is current as of thepublication date. Changes which may occur after publicationare covered by either Service Bulletins or Manual Revisions.These are issued as required.ORDERING REPLACEMENT PARTSWhen ordering replacement parts or equipmentinformation, the full part identification number should beincluded. This applies to all parts : components, kits, orchassis. If the part number is not known, include the chassis orkit number of which it is a part, and a sufficient description ofthe required component for proper identification.PERSONAL SAFETYThe following precautions are recommended for personalsafety :• DO NOT transmit until all RF connectors are verified secureand any open connectors are properly terminated.• SHUT OFF and DO NOT operate this equipment nearelectrical blasting caps or in an explosive atmosphere.• This equipment should be serviced by a qualifiedtechnician only.SERVICEThis radio is designed for easy servicing. Refer to theschematic diagrams, printed circuit board views, andalignment procedures contained within.Destnation Number of CH RF power outputC 50 5W/2W型式信道号码射频功率输出C 50 5W/2WGENERAL / 概述目录目录目录目录目录概述. ............................................................................ 2模式组合 ...................................................................... 3电路说明 .................................................................... 11半导体数据 ................................................................ 18元件说明 .................................................................... 19端子功能 .................................................................... 21零件表 ....................................................................... 22部件分解图 ................................................................ 29包装 ........................................................................... 30调整 ........................................................................... 31PC板视图显示单元 (X41-3583-00) ....................................... 37发射－接收单元 (X57-6233-00) ............................. 39原理图 ....................................................................... 51方块图 ....................................................................... 55电平图 ....................................................................... 57BC－20, PB－40, PB－41, BT-12 ............................... 58规格 ........................................................................ 背面引言本手册的范围本手册是提供给熟悉通信专业并且具有维修经验的技术人员使用的。它包括了维修该设备所需要的全部资料和现行出版日期。在出版后可能发生变动，如果需要，可以使用《维修通报》或《手册修订本》进行补充。替换零件的订购当订购替换零件或设备信息时，应注明完整的零件识别号码。所有的零件均有识别号码：元件、组件或机壳。如果不知道零件的号码，为了正确地识别，必须注明此元件所属的机壳或组件的号码，并对元件进行充分的说明。个人安全为了个人的安全，请注意下列事项：• 在没有认真核实所有射频插头之前或有任何一个打开的插头没有连接到相应端子上的情况下，均不要发射。• 在电爆管附近或在易燃性气体环境中，必须关掉电源，不要操作本设备。• 本设备只应该由有资格的技术人员来维修。维修服务为了便于维修本设备，建立了完整的维修服务体系，提供了包括原理图、印刷线路板图和调整步骤在内的资料供参考。