论文部分内容阅读
彩色拖尾,是指在聚焦电路和会聚系统工作正常的前提下,颜色向右边缘溢出的现象。维修实践中常见的有以下几种类型,可视具体情况分别处理。一、显像管阴极衰老 1.显像管三个阴极都衰老此类故障表现为:亮度较暗,图像淡薄,当调大亮度、对比度和色饱和度时,图像模糊,聚焦发散,图像严重拖尾。为了进一步证实阴极是否老化,可采用灯丝加热后测阴栅极电阻的方法进行判断。一般认为,阻值在1～4kΩ表明阴极发射能力正常;阻值在4～100kΩ
Color trailing, refers to the convergence of the convergence circuit and the convergence of the system under the premise of the color to the right edge of the phenomenon of overflow. Maintenance of the common practice of the following types, depending on the specific circumstances were handled. First, the CRT cathode aging 1. CRT cathode are three aging These failures are as follows: darkness, light image, when the increase brightness, contrast and color saturation, the image blurred, focused divergence, the image of a serious tail. In order to further confirm whether the aging of the cathode, filament heating can be measured after the method of measuring the negative gate resistance to judge. Generally believed that the resistance in 1 ~ 4kΩ cathode emission normal; resistance in 4 ~ 100kΩ