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DF_5型机车状态显示装置由12个传感器和12个信号指示灯组成,指示灯使用的灯珠为钨丝灯,不仅流明很低,司乘人员不易观察,而且发热量大。灯罩和灯座是由普通塑料制成,不耐高热,当信号指示灯点亮时间稍长,灯罩受热扭曲变形,灯泡熄灭后由于温度降低,变形的灯罩就紧紧贴在灯泡上,灯泡再次点亮后因散热不畅造成灯丝烧断。而灯座变形将导致接线端子短路,不仅使灯泡烧毁,而且会造成脱扣开关断开,全车仪表失效。
DF_5 locomotive status display device consists of 12 sensors and 12 signal indicator light, the lamp beads used for the tungsten lamp, not only lumens is very low, the Secretary by the staff is not easy to observe, and the heat. The lampshade and the lampshade are made of ordinary plastic, and are not heat-resistant. When the signal lamp lights for a long time, the lampshade is distorted by the heat. When the lamp is extinguished, the lampshade is tightly attached to the lamp because the temperature is lowered. Lit due to poor heat caused by the filament blown. The lamp holder deformation will lead to short-circuit terminals, not only burn the bulb, but also cause the trip switch off, the entire car instrument failure.