General - Kenwood TK-3148 Service Manual

TK-3148
概述 ............................................................................................... 2
系统体系 ...................................................................................... 3
操作特性 ...................................................................................... 4
模式组合 ...................................................................................... 6
电路说明 .................................................................................... 10
半导体数据 ................................................................................ 19
元件说明 .................................................................................... 21
零件表 ........................................................................................ 23
部件分解图 ................................................................................ 31
包装 ............................................................................................. 32
INTRODUCTION
SCOPE OF THIS MANUAL
This manual is intended for use by experienced technicians
f 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 e
communications equipment. It contains all required service
information for the equipment and is current as of the
publication date. Changes which may occur after publication
are covered by either Service Bulletins or Manual Revisions.
These are issued as required.
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment information,
the full part identification number should be included. This
applies to all parts : components, kits, or chassis. If the part
number is not known, include the chassis or kit number of
which it is a part, and a sufficient description of the required
component for proper identification.
PERSONNEL SAFETY
The following precautions are recommended for personnel
safety:
● DO NOT transmit until all RF connectors are verified secure
and any open connectors are properly terminated.
● SHUT OFF and DO NOT operate this equipment near
electrical blasting caps or in an explosive atmosphere.
This equipment should be serviced by a qualified technician only.
●
SERVICE
This radio is designed for easy servicing. Refer to the
schematic diagrams, printed circuit board views, and alignment
procedures contained within.
2
目 录 目 录
目 录 目 录 目 录
调整 ............................................................................................. 33
端子功能 .................................................................................... 52
PC 板视图
TX－RX 单元 (X57-6413-01) (A/3) ................................... 54
TX－RX 单元 (X57-6413-01) (B/3),(C/3) ......................... 58
原理图 ........................................................................................ 60
电平图 ........................................................................................ 65
方块图 ........................................................................................ 66
KSC-25 / KNB-24L .................................................................... 68
规格 ......................................................................................... 背面
概述

GENERAL /

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。在出版后如果发生变动、则根据需要使用《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资料时、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。