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我们在上海产XG500mAX线机(以下简称甲机)和西南产KF58-200型200mAX线机(以下简称乙机)上遇到两例是同一原因造成的少见故障。其共同现象是:开机后即有X线产生,毫安表有指示,毫安大小及荧光屏亮度均受控于毫安调节旋钮。这说明X线机高压初级可能已越过高压接触器,构成了回路。经检查,高压接触器未闭合,高压初级P_1,P_2确有电压。去掉控制台上的P_1,开机后仍有X线产生,于是
We encountered two cases on the Shanghai XG500mAX line machine (hereinafter referred to as “A” machine) and the southwest-made KF58-200 type 200mAX line machine (hereinafter referred to as “B machine”) are the rare cause of the same failure. The common phenomenon is that there is X-ray generation after power-on, the milliammeter has indication, and the milliampere size and screen brightness are controlled by the milliampere adjustment knob. This shows that the high voltage primary of the X-ray machine may have crossed the high-voltage contactor, forming a loop. Upon inspection, the high-voltage contactor is not closed, and the high voltage primary P_1, P_2 does have a voltage. Remove the P_1 on the console, there is still X-ray generated after the boot, so