判断行输出变压器{简称“行变”)故障的方法很多,笔者使用的短路行推动变压器初级的方法,简单而迅速。在检修彩色电视机时,听到机内有轻微的“吱吱”声,测118V主电压低到50V左右时,可将行激励变压器的初级瞬间短路一下,若主电压能回升至118V,说明行输出变压器内部短路。用短路法判断行输出变压器故障,实际上就是让行输出部分直流正常供电,交流振荡停止。因为行输出变压器的 Judgment of the line output transformer {referred to as “line change”) fault many ways, I use the short circuit to promote the transformer primary method, simple and rapid. In the maintenance of color TV sets, hear the machine there is a slight “creak” sound, measured 118V mains voltage as low as about 50V, the line can be the first moment of excitation transformer short circuit, if the main voltage can rise to 118V, that Line output transformer internal short circuit. Judgment with the short circuit output transformer failure, in fact, is to make the line output part of the normal DC power supply, AC oscillation stop. Because the line output transformer