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彩电高压嘴与显像管外壳接地石墨层之间距离近,有二万多伏高压。彩电使用一段时间后,高压嘴处产生打火现象不外乎以下三种原因:(1)空气中灰尘较多。电视机工作过程中,由于高压产生静电感应而将灰尘吸附地高压帽周围,使其绝缘性能下降;(2)空气湿度大,高压帽密封不严,使高压帽内进入潮湿空气;(3)高压卡簧与高压线连接焊点有毛刺,毛刺会产生尖端放电现象,将高压帽橡胶烧老化。 彩电高压嘴发生打火现象,可用下列方法来消除:(1)先将高压嘴处放电。取出烧坏高压帽和卡簧。如果高压嘴及周围无石墨层部分的污垢不多,可用酒精棉花清洗;若污垢较厚,可用锋利刀片类工具刮除。如高压嘴有锈迹,应用砂纸等
Color high-pressure nozzle and CRT shell grounded graphite layer distance between the close, there are more than 20,000 volts. After the use of color TV for some time, high pressure nozzle at the ignition phenomenon is nothing more than the following three reasons: (1) more dust in the air. During the operation of the television set, the electrostatic attraction of the high voltage causes the dust to adsorb around the high-pressure cap to reduce the insulation performance; (2) the air humidity is high and the high-pressure cap is not tightly sealed so that the high-pressure cap enters the humid air; (3) Crimp and high voltage wire connection pads have burrs, burrs will have a tip discharge phenomenon, the high-pressure cap rubber burn aging. Color high pressure nozzle ignition phenomenon occurs, the following methods can be used to eliminate: (1) first discharge at a high pressure mouth. Remove the burned high pressure cap and retainer. If the high-pressure nozzle and the surrounding part of the non-graphite layer of dirt less alcohol cotton can be used to clean; if the dirt is thicker, you can use sharp blade type tool to remove. Such as high-pressure mouth rust, the application of sandpaper