笔者多年从事电视机维修工作,对耳闻目睹和亲身体会的误判作一分析,供同仁借鉴。1.维修者对电路的工作原理掌握得不够深刻,知其一,不知其二,靠想当然去检测和维修,导入误区。不但查不到故障所在反而又增加新的故障,不能恢复原状。例一、彩电屏幕上部有几条亮线,一般是4.7μF/50 V 场输出泵电源电容失效或容量减小所致,但误认为是场管工作不良进行 The author for many years engaged in the TV repair work, to hear and see and personal misjudgment as an analysis for my colleagues to learn. 1. Maintenance of the working principle of the circuit mastered not deep enough, I know one, I do not know the second, by virtue of course, to detect and repair, into the erroneous zone. Not only failed to find the fault but added a new fault, can not be restored to its original condition. Example 1, the upper part of the color TV screen has a few bright lines, usually 4.7μF / 50 V field output pump power capacitor failure or reduced capacity, but mistakenly believe that the field tube work bad