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接修一台西湖C2006C彩电,据用户介绍:声、图均正常,只是屏幕上出现“七彩虹”。于是打开电视试机,现象为:光栅暗,散焦,有色斑(如图1),认为是小故障,无非是管座受潮,消磁电路有问题。由于当时有其他事情,让户主第二天取机。次日,打开电视机观察现象,不由大吃一惊,故障现象有很大变化(如图2),已感觉到不是一般的小故障了。随后开始细致检查,除了把管座换掉,光栅亮度
Pick up a West Lake C2006C color TV, according to the user: sound, the picture are normal, but the screen appears “Rainbow.” So turn on the TV test machine, the phenomenon is: grating dark, defocused, pigmented (Figure 1), that is a small fault, nothing more than damp tube, degaussing circuit problems. As there were other things at that time, let the head of household take the opportunity the next day. The next day, turn on the TV to observe the phenomenon, not help but be surprised, there are great changes in the phenomenon of failure (Figure 2), has felt not a general glitch. Then began a careful examination, except for the tube replaced, grating brightness