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本文通过对我所JEM-100CX型透射电镜近年来出现的一些故障的检查分析,谈几点维修体会。 1.选择合适的代换元件问题在维修工作中常遇到无同型号的元件替换和查不到参数的情况。应怎样选择合适的元件使用呢?笔者根据工作实践,认为可以由相应电路的分析来选取代换元件。我所这台电镜曾出现荧光屏幕上有一小亮点但照明光斑调不开的情况。从现象看,出现小亮点说的电子枪有电子未发射,光斑调不开则是由于聚光镜电路或透镜成像放大电路的故障所引起的。,该仪器的六
This article through my JEM-100CX TEM observation of some failures in recent years, analysis, talk about a few maintenance experience. 1. Select the appropriate substitution problem In the maintenance of work often encountered no replacement of the same type of components and can not find the parameters of the situation. How to choose the right components to use it? According to the author’s practice, I believe that the corresponding circuit can be selected to analyze the analysis of replacement components. My electron microscope at this stage had a small bright spot on the fluorescent screen but the lighting was not turned on. From the phenomenon of view, there is a small bright spot that the electron gun did not emit electron gun, the spot is not open due to condenser lens or lens imaging amplifier circuit caused by the failure. Six of the instrument