故障现象：在透视工作过程中，踩曝光脚闸，显示器上没有图像，此时操纵台上高压指示正常，但没有ｍＡ指示。分析处理：出现故障后，首先判断有无Ｘ线产生，取下摄像头，用眼观察影像增强器上情况，发现曝光时影像增强器上没有图像，这样就排除了Ｘ线电视系统故障的可能，而影 Symptoms: In the perspective of the work process, step on exposure brakes, there is no image on the monitor, this time on the control console high pressure instructions, but no mA indication. Analysis and treatment: After the failure, the first to determine whether the X-ray generation, remove the camera, with the eye to observe the situation on the image intensifier and found no image on the image intensifier exposure, thus ruled out the possibility of X-ray television system failure, And shadow