故障现象 :打开电源 ,技术开关不论是选择在透视部分或者在摄影部分 ,都不能曝光 ,电路过载指示灯亮。分析与维修 :不能曝光 ,检查电路部分 ,先检查低压电路部分 ,去掉Ｔ1、Ｔ2线 ,断开高压系统进行曝光试验 ,低压工作正常 ,且不过载 ,说明过载电路也正常。可以判定 ,故障出在 Failure phenomenon: Turn on the power, the technical switch can not be exposed either in the perspective part or in the photography part, and the circuit overload indicator light is on. Analysis and maintenance: can not be exposed, check the circuit part, first check the low-voltage circuit part, remove the T1, T2 line, disconnect the high-pressure system for exposure test, low-voltage operation is normal, and not overloaded, indicating that the overload circuit is also normal. It can be determined that the fault is in