论文部分内容阅读
彩色显像管是彩电的重要部件,价格昂贵,尤其要好好加以保养,根据笔者的经验,如能做到以下8点,便可大大提高彩色显像管的寿命。 1.防止显像管在阳光下曝晒。因为阳光中的紫外线会使荧光粉老化,降低荧光粉的电光转换效率,使荧光屏发光能力降低,亮度提不起来。 2.防止高压打火。在潮湿的季节里,电视机高压帽附近容易打火,发出紫蓝色火花,在听到“叭叭”响声的同时,并能嗅到一种臭氧味。轻则影响电视图像质量,重则使显像管玻璃受热不匀,发生爆炸。排除的办法是:待放电后,去掉高压帽,用脱脂棉蘸无水酒精,清洗高压帽附近的灰垢。最好的办法是在清洗之后,在高压帽周围涂上4—6cm的高压硅脂,隔绝外部潮湿空气,提高绝缘性。
Color CRT is an important part of color TV, expensive, in particular, to be properly maintained, according to the author’s experience, if you can do the following 8:00, you can greatly enhance the color CRT life. 1. To prevent the picture tube in the sun exposure. Because the ultraviolet light in the sun will make the phosphor aging, reduce the electro-optical conversion efficiency of the phosphor, so that the screen luminous ability to reduce the brightness can not mention. 2. To prevent high-pressure ignition. In the humid season, the TV near the high-pressure cap easy ignition, purple blue sparks, hear the “horn” sound at the same time, and can smell an ozone smell. Ranging from the impact of television image quality, while the kerosene glass uneven heating, an explosion. Rule out is: to be discharged, remove the high pressure cap, moistened with absorbent cotton alcohol, cleaning high pressure cap near the gray scale. The best way is to wash the high pressure cap around 4-6cm after the high pressure grease, isolated from the external humid air to improve the insulation.