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笔者遇到一例床边X线机定位灯故障,现将检修体会介绍如下: 故障现象:开机后,按定位灯开关,灯不亮,且在按下开关的同时能听到遮光器内部有比较高频的振荡声。 分析检修:交流12V电源输入L1板的2、3两端,H1为一12V、100W灯泡,S2为100温度保护开关,当按下S1时,触发D1工作,使D1的3端输出约1分钟的高电平(12V),K1得电工作,使H1得电,灯泡点亮,约1分钟后,D1的3端输出低电平,K1失电,灯泡熄灭。
I encountered a bedside X-ray machine positioning light failure, the experience will be described as follows: Fault phenomenon: After boot, press the position light switch, the light is off, and press the switch at the same time can hear the internal comparison of the shutter High-frequency oscillations. Analysis and maintenance: AC 12V power input L1 board 2,3 ends, H1 is a 12V, 100W light bulb, S2 is 100 temperature protection switch, when pressing S1, trigger D1 work, so that D1 output 3 minutes about 1 minute The high level (12V), K1 get electricity work, so that H1 get electricity, light bulbs light, about 1 minute later, D1’s 3 output low, K1 loss of electricity, light bulbs go out.