看了《家电检修技术》1999年第5期10页刊登的杨文胜先生“彩电视放电压滤波电容引起的故障”一文,文中指出,该电容变质后,因电容量减小或消失或轻微漏电等原因,会产生多种多样故障现象,归纳起来有以下几种现象: 1.图像布满一层木纹形状的干扰线条;2.图像拉毛、拉尾;3.图像表面蒙上一层“白雾”;4.图像满屏有淡淡的回扫线;5.光栅或图像左半边有几条垂直黑色干扰条(俗称“肋骨条”);6.无图像、光栅亮度过大并伴有明显的回扫线;7.亮度和对比度调节范围变窄等。同样是视放电源滤波电容变质.但为什么有如此不同的故障现象呢?笔者就这个问题,根据自己的检修实践经验和对这类型故障的研究做些浅析,希望能解开这个谜。不妥之处,还请同行多加指正。首先谈谈该电容的内在必然故障因素:由于该电 Read the “appliance repair technology” 1999 fifth issue of 10 pages published by Mr. Yang Wensheng “color TV voltage filter capacitor breakdown caused by a” article, the paper pointed out that the deterioration of the capacitor, the capacitance decreases or disappears or slight leakage, etc. Reason, there will be a variety of fault phenomena, summed up the following phenomena: 1. The image is covered with a layer of wood-shaped interference lines; 2. Image hair, tail; 3. The image surface is covered with a layer of “white Fog ”; 4. Image full screen with a faint flyback line; 5 grating or left half of the image there are a few vertical black interference bar (commonly known as“ ribs ”); 6 no image, the grating brightness is too large and accompanied by obvious Of the flyback line; 7 brightness and contrast adjustment range narrowing. The same is put on the power supply filter capacitor deterioration, but why there are so different fault phenomenon? I on this issue, according to their own overhaul practice experience and research on this type of fault to do some analysis, hoping to unlock the mystery. Inappropriate place, but also more colleagues please correct me. First of all talk about the inherent inevitable failure of the capacitor: Due to the electricity