【摘 要】
：
故障现象Ⅱ台照相机反复发生一种现象:机器连续曝光几次后,曝光便不能进行。但关机两小时后,重新开机,曝光又恢复正常。故障检修机器不曝光后,观察启动保护板,发现JC_(10)继
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故障现象Ⅱ台照相机反复发生一种现象:机器连续曝光几次后,曝光便不能进行。但关机两小时后,重新开机,曝光又恢复正常。故障检修机器不曝光后,观察启动保护板,发现JC_(10)继电器不工作。用钳形表测量互感器B_5、B_6、B_7次级电流,发现B_5次级无电流,说明Ⅱ台灯丝回路断路,引起主机曝光不能进行。其原理是当灯丝回路断路时,
Problem Phenomenon II The camera repeatedly experiences a phenomenon that the exposure cannot be performed after the machine has continuously exposed several times. However, after shutting down for two hours, the camera was turned on again and the exposure returned to normal. After the troubleshooting machine is not exposed, observe the start protection board and find that the JC_(10) relay does not work. The secondary currents of transformers B_5, B_6, and B_7 were measured using a clamp meter and it was found that there was no current in the secondary of B_5, indicating that the circuit of the II filament was open circuited and the exposure of the host could not be performed. The principle is when the filament circuit breaks,
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