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投影器在使用中出现光亮度异常小故障,常常会给教学带来影响,给教师带来麻烦,现介绍用“两看”排除故障的简易方法: 一、看银幕中异常现象排故法。 1.银幕中出现椭圆形“光球”。这是螺纹透镜装反的缘故,翻过来重装即可。 2.银幕四周出现“彩色”。这是灯泡上方的凸透镜离螺纹透镜的距离太近所致。只要把灯座往下调,调到银幕四周无“彩色”为止。 3.银幕中出现“黑色几何图形”。这是灯泡上方的凸透镜向上翻起,镜边铁片遮住光线的缘故。只要把凸透镜翻下,往下按到与灯泡平行的位置即可。
Projection in the use of abnormal brightness glitches, often give teaching an impact, bring trouble to teachers, is now introduced with “two look ” a simple way to troubleshoot: First, look at the screen anomalies troubleshooting law. 1. The screen appears oval “light ball ”. This is the reason anti-threaded lens installed, turn over heavy equipment can be. 2. The screen appears “color”. This is because the convex lens above the bulb is too close to the threaded lens. As long as the light down to the screen, transferred to the screen without “color ” so far. 3. “Black Geometry” appears in the screen. This is the bulb above the convex lens up, mirrored iron cover the light of the reason. As long as the convex lens down, press down to the position parallel to the bulb can be.