论文部分内容阅读
康佳 T2128彩电有一种“通病”:使用后或迟或早要出现冒烟、“吱吱”声、突然“三无”、+B 电压升高、不能开机等异常现象。原因是主板上开关电源元件排列过于密集,再加上周围有开关变压器和开关管散热器的包围,使整个开关电源部分形成了一个“高温区”。时间一久“高温区”内的发热元件和受热元件,便开始老化变质,出现上述故障现象。在检修中如果不采取一点点措施,则这种“通病”难以治愈,即使故障一时排除,但免不了以后故障再度出现。
Konka T2128 color TV has a “common problem”: after use or sooner or later smoke, “creak ” sound, suddenly “three no ”, + B voltage increases, can not boot and other anomalies. The reason is that the onboard switching power supply components arranged too dense, coupled with the surrounding switch transformer and switch tube radiator surrounded the entire switching power supply part of the formation of a “hot zone.” Over time “hot zone” within the heating element and the heating element, it began to aging deterioration, the above symptoms. In the overhaul if you do not take a little bit of measures, this “common sense ” difficult to cure, even if the fault ruled out at once, but inevitably the fault again.