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一、灯泡亮,但投影屏上无光或明暗不均故障原因主要是光路不通。可按以下方法检查调修,先拔掉天平底板下的接线插头,用两根电线连接在插头上使电路直接接通——灯长明;然后取下横梁,将一白纸条放在立柱通光孔前,拧松灯头座定位螺丝钉,转动并前后移动灯头座,直至白纸条上出现明亮光点,再前后移动聚光管,直到白纸条上的光点变为一直径为5mm左右的光环即可;最后调节小反射镜,使投影屏上光亮满窗为止。
First, the light bulb, but the projection screen matte or uneven The main reason for the failure of the light path. Can be repaired as follows, first unplug the balance under the floor plug, with two wires connected to the plug on the circuit directly connected - light Chang Ming; and then remove the beam, a white note on the column Before passing the light hole, unscrew the cap screw, rotate and move the cap back and forth until a bright spot appears on the white strip, and then move the light tube back and forth until the light spot on the white strip becomes a diameter of 5mm About the aura can be; Finally, adjust the small mirror, the projection screen so bright full window.