1故障现象一无论选用大焦或小焦摄影条件,立柱上球管都无射线产生。故障分析与检修。此故障表明立柱上球管摄影电路有问题,引起这种故障的原因较多,为缩小故障检修范围,可根据控制台在立柱球管摄影时有关继电器工作情况来判断故障点。按下“1”号一般摄影钮,选择合适的摄影条件 1 Failure phenomenon No matter whether large or small-focus photography conditions are selected, no ray is generated on the tube on the column. Failure analysis and maintenance. This failure indicates that there is a problem with the shooting circuit of the tube on the column. There are many reasons for this failure. In order to reduce the scope of troubleshooting, the failure point can be judged according to the work of the relay when the tube is photographed by the console. Press the “1” general photography button to select the appropriate shooting conditions