一、故障概述和故障原因分析彩电无光、无图、无声(三无),测量电源厚膜块、保险管均已损坏,连换连烧。有时还连带损坏开关电源电路中的诸多元件,连带损坏电阻、三极管、“行管”、场输出块和微处理器。总之,这是一种综合性的故障,称为“屡换屡烧电源厚膜块”。1.应用于彩电开关电源中的电源厚膜块型号 First, the overview of the fault and failure analysis Color TV no light, no picture, silent (three no), measuring the power of thick film, the fuse has been damaged, even for even burning. Sometimes even damage to the switching power supply circuit of many components, together with the damage resistance, transistor, “line management ”, the field output block and the microprocessor. In short, this is a comprehensive failure, known as “repeated replacement of thick film burning power block.” 1. Used in the color TV switching power supply thick film block model