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随着电视机的日益普及,天线放大器的社会拥有量也与日俱增,其维修量亦随之大幅度增加。有许多故障是因用户不懂正确安装使用方法造成的。如有的用户把～220V市电接入放大盒中;有的则将放大盒、电源盒上的输入、输出端错接;有的则接线不合规范而引起短路故障;还有些用户不懂防雷避雷知识,使天线放大器在雨季频遭雷击。许多用户对它的电路工作原理还不大清楚,有的用户甚至感到它比收音机还要复杂神秘。因此,宣传普及电视天线放大器的工作原理和正确使用维修常识,是十分必要的。一、天线放大器的种类及性能天线放大器的种类主要有:卫星电视地面接收设备用天线放大器、电视差转机用天线放大器、共用电视天线系统用天线放大器、普通电视机用天线放大器。前几种都属专业用天线放大器,其制作、修理难度较高,元器件价格也昂贵,但社会拥有量不大。本文所介绍的是最后一种—即普通
With the increasing popularity of television sets, antenna amplifiers are also increasing in social possession, and the amount of maintenance also increases substantially. There are many problems because the user does not understand the correct installation and use of the method. If some users access ~ 220V mains amplification box; some will enlarge the box, the power box on the input and output mismatch; while others are not standard wiring and cause a short circuit failure; some users do not know how to prevent Ray lightning knowledge, so that the antenna amplifier was struck by lightning in the rainy season. Many users work on its circuit is not clear, and some users even feel it is more complicated than the mysterious radio. Therefore, the popularization of TV antenna amplifier works properly and the proper use of maintenance knowledge is very necessary. First, the type and performance of the antenna amplifier Antenna amplifier types are: satellite TV ground receiving equipment with an antenna amplifier, TV transmission machine antenna amplifier, antenna system for the common TV antenna amplifier, antenna amplifier for ordinary TV. The first few are professional antenna amplifier, its production, repair more difficult, expensive components, but the community has little. This article describes the last one - that is, ordinary