General; 概述 - Kenwood NX-800 Service Manual

INTRODUCTION
SCOPE OF THIS MANUAL
This manual is intended for use by experienced techni-
cians familiar with similar types of commercial grade com-
munications equipment. It contains all required service
information for the equipment and is current as of this pub-
lication date. Changes which may occur after publication
are covered by either Service Bulletins or Manual Revisions,
which are issued as required.
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment informa-
tion, the full part identifi cation number should be included.
This applies to all parts: components, kits, and chassis. If
the part number is not known, include the chassis or kit
number of which it is a part and a suffi cient description of
the required component for proper identifi cation.
PERSONAL SAFETY
The following precautions are recommended for personal
safety :
• DO NOT transmit if someone is within two feet (0.6 me-
ter) of the antenna.
• DO NOT transmit until all RF connectors are secure and
any open connectors are properly terminated.
• SHUT OFF this equipment when near electrical blasting
caps or while in an explosive atmosphere.
• All equipment should be properly grounded before pow-
er-up for safe operation.
• This equipment should be serviced by only qualified
technicians.
PRE-INSTALLATION CONSIDERATIONS
1. UNPACKING
Unpack the radio from its shipping container and check
for accessory items. If any item is missing, please contact
KENWOOD immediately.
2. PRE-INSTALLATION CHECKOUT
2-1. Introduction
Each radio is adjusted and tested before shipment. How-
ever, it is recommended that receiver and transmitter opera-
tion be checked for proper operation before installation.
2-2. Testing
The radio should be tested complete with all cabling and
accessories as they will be connected in the fi nal installa-
tion. Transmitter frequency, deviation, and power output
should be checked, as should receiver sensitivity, squelch
operation, and audio output. Signaling equipment operation
should be verifi ed.
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。在出版后可能发生变动，如果需要，可以参照 《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，应注意完整的零件识别号
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∶
• 如果有人在天线两英尺 (0.6 米 ) 范围之内时，不要进行发
射。
• 在没有认真核实所有射频插头之前或有任何一个脱开的插
头没有连接到相应端口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，必须关闭电源，不
要操作本设备。
• 为了操作的安全，在接通电源之前所有设备应该连接地线。
• 本设备只应该由有资格的技术人员进行维修。
安装前条件
1. 开箱
从运输包装中取出本无线电设备并检查附件。如果有任何
组件遗失，请立即与 KENWOOD 联系。
2. 安装前检查
2-1. 说明
在运输之前每一台无线电设备均已调整和测试过。但是，
在安装之前最好检查接收和发射以便操作正确。
2-2. 测试
无线电设备应该按照电缆和附件最终安装时的连接进行完
整的测试。应该检查发射频率，频偏和输出功率，同样应该
检查接收灵敏度，静噪和音频输出。应该检验信令操作。
NX-800
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