论文部分内容阅读
在使用匈牙利EDR—750B型X线机过程中,常出现故障,我们进行了检修,其中两例较常见,介绍如下:(一) 故障现象:透视时电视影像显示模糊不清。检修过程:开机后将影像增强器放大倍数1:1,1:1.5,1:2档位转换时出现影像瞬间显示清晰,这种现象,可初步判定为增强器部份故障。参照影像增强器电路图,对增强管聚集极G_1G_2G_3电压的分压电阻群进行逐个测量。侧出R_(?)MΩ1 W电阻断路。更换同型号电阻后,其故障消除。原因分析:R_(19)电阻的质量问题,造成断路使增强器
In the process of using Hungary EDR-750B X-ray machine, there are often failures, we conducted a repair, two of which are more common, described as follows: (A) Failure phenomenon: TV images in the perspective of blurred vision. Maintenance process: Power on the image intensifier magnification 1: 1, 1: 1.5, 1: 2 shift when the image appears momently display clear, this phenomenon can be initially judged as enhancer part of the fault. With reference to the image intensifier circuit diagram, the voltage dividing resistor group of the reinforcing tube collector G_1G_2G_3 is measured one by one. Side R_ (?) MΩ1 W Resistor open circuit. Replace the same type of resistance, the failure to eliminate. Analysis of the reasons: R_ (19) resistance of the quality problems, resulting in circuit breaker so enhancer