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彩电“三无”故障很多是因开关管(厚膜块)或行管损坏造成。损坏原因及检修方法有报刊已多有介绍,本文不再赘述。开关管(厚膜块)、行管是彩电中发热较多的元件。为了及时散发管子工作时产生的热量保证机器正常工作,各型机均装有专用散热器或散热板。为了减小管子(厚膜块)与散热板间的热阻,很多厂家还在管子与散热板间涂了导热硅酯。因为原机生产厂已对管子工作散热采取了相应措施,所以多数维修人员检修时查出故障原因后便换上新管(厚膜块),通电检查开关电源工作正常,试看机器各项功能正常,摸开关管(厚膜块)、行管工作温度不高就认为大功告成,检修完毕。孰不知还有隐患在里边。有时机主取回机器不久就老病复发。拆开检查竟又是新换管(厚膜块)损坏。有
Color TV “three no” fault a lot because of the switch (thick film) or line of damage caused. The cause of the damage and repair methods have more newspapers have introduced, this article will not go into details. Switch (thick film), line tube is more heat in color TV components. In order to timely distribute the heat generated by the work of the pipe to ensure the normal operation of the machine, all types of machines are equipped with a special radiator or heat sink. In order to reduce the thermal resistance between the tube (thick film block) and the cooling plate, many manufacturers also coated the thermal silica between the pipe and the cooling plate. Because the original machine manufacturer has taken measures to heat the pipe work, so most maintenance personnel to find out the cause of the malfunction after the replacement of the new tube (thick film), power check the switch power supply is working properly, try the various functions of the machine normal , Touch the switch tube (thick film), line control temperature is not high that you’re done, overhaul completed. Everyone knows there are hidden dangers in it. Occasionally the main recalled machine soon relapsed. Disassemble inspection is actually a new tube (thick film) damage. Have