故障现象正常选择曝光条件作普通摄影 ,压下手闸Ⅰ挡 ,旋转阳极运转 ,但压下Ⅱ挡时 ,机器不曝光 ,毫安表无管电流指示 ;松开手闸 ,旋转阳极经数秒后停止转动。透视工作正常 ,其它摄影条件时故障同上。故障分析本机普通摄影的工作程序和原理分析 (图略 ) :方式选择开关XK3置于摄 Symptom Normally choose the exposure conditions for ordinary photography, press the hand brake I block, rotate the anode to run, but the machine is not exposed when the II block is pressed, the milliamp meter no current indication; release the hand brake, rotate the anode after a few seconds to stop Turn it. The perspective is working properly. The faults in other photography conditions are the same as above. Failure analysis of the ordinary work of the camera’s working procedures and principle analysis (figure omitted): mode selection switch XK3 placed on camera