引起黑白电视机自激故障的原因较多,检修难度也较大,如何根据故障现象,再通过必要的检测来准确确定故障的具体部位,是维修人员关心的问题。笔者根据多年来的维修经验,将黑白电视机高放、中放、视放、伴音电路产生的自激故障的特点、判别方法和产生自激的原因,列表如下,以供参考。 Caused black-and-white TV self-excited failure of more reasons, maintenance is also more difficult, according to the phenomenon of failure, and then through the necessary testing to accurately determine the specific location of the fault, maintenance personnel are concerned about. The author based on years of maintenance experience, the black and white TV high-Fang, Fang Fang, as Fang, audio circuit self-excited failure characteristics, the method of identification and the reasons for self-excited, the list below, for reference.