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一台凯歌4D9U—H型电视机,屏幕中间有一条比其它部位亮得多的白带(垂直),在此垂直白带中,还有更亮的闪电状亮线,呈放射状布满屏幕,喇叭中还有“喀喀”的响声。据此认为:这是典型的行振级有强迫停振现象。而能造成此故障的部位有三个:1.自动频率调整系统输出端的行频滤波电容有短路现象,但未完全短路。2.自动频率调整系统输出端与行振荡管基极有短路现象。3.行振荡管发射极行振电容容量变
A Triumph 4D9U-H TV with a leucorrhea (vertical) much brighter than the rest in the center of the screen, and a brighter lightning-like bright line in the vertical leucorrhea, And “Titicaca” sound. According to this view: This is a typical line vibration level forced stop-stop phenomenon. However, there are three parts that can cause this fault: 1. The line frequency filter capacitor at the output of the automatic frequency regulation system has a short circuit, but it is not completely short-circuited. 2 automatic frequency adjustment system output and the line oscillation tube base short-circuit phenomenon. 3. Row oscillation tube emitter capacitance change capacitance