在对电子仪表和电子线路的检修中,有些故障从现象看比较直观,从电路原理粗略分析也可能比较简单,此时极易从常规的思维定式出发去处理。若遇到这些故障是由一些超出常规的较少出现的隐蔽原因所引起的话,检修工作往往走弯路;有时这些故障并非是由于器件完全损坏所造成,故障现象时有时无,就更增加了检修工作的 In the maintenance of electronic instruments and electronic circuits, some of the failures from the phenomenon to see more intuitive, from the rough analysis of circuit theory may be relatively simple, easy to start from the conventional thinking to handle. In the event of these failures are caused by a few more than the conventional hidden reasons, maintenance work often detours; sometimes these failures are not caused by the device is completely damaged, the phenomenon of failure sometimes even more increased maintenance work