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长江F16—42型电影放映机的光源采用电弧放电发光的铟灯,具有体积小、亮度高、色温好等优点。但点燃铟灯并不像点燃普通灯泡那么简单,它需要单独的铟灯电源。但有了铟灯电源也就增加了整机的故障率。我校一台新购的F16—42型放映机,使用不久就发现铟灯不能点燃,现将其修理过程简介于下: 点燃铟灯必须具备以下四个条件:1.要有10KV的高频启动高压;2.主电源的直流电压必须大于铟灯工作电压的3—5倍(工作电压约在45V左右);3.铟灯点燃后必须对主电源进行限流;4.直流电源的波纹系数必须小于1—2%。根据我校放映机上的铟灯的
Yangtze River F16-42 movie projector using arc discharge light source of indium lamp, with small size, high brightness, good color temperature and so on. However, igniting an indium lamp is not as simple as igniting an ordinary bulb, which requires a separate indium lamp power supply. But with indium lamp power will increase the failure rate of the whole machine. Our newly purchased F16-42 projector, the use of the indium lamp can not be ignited soon, now its repair process is briefly below: Ignition indium lamp must have the following four conditions: 1. To have 10KV high-frequency start-up high voltage ; 2. Main power supply DC voltage must be greater than 3-5 times the indium lamp operating voltage (working voltage is about 45V or so); 3 indium lamp ignition must limit the main power supply; 4. DC power supply ripple factor must Less than 1-2%. According to our school projector on the indium lamp