目前大多数彩电采用的显像管管座,其聚焦极电压的供给都是在管座上设计一个用于吸收尖峰电压的腔室结构,以避免损坏其它元件。这种腔室结构最容易出现的问题是,因放电电极间的绝缘电阻下降,使聚焦电压偏离最佳值而导致图像模糊不清,这点在我国南方及气候潮湿地区尤为突出。常规的修理方法是把管座打开,用酒精清洗腔室。即使更换新管座,在气候潮湿地区的管座寿命也只有几个月。 At present, most of the CRT TV sets used in color televisions are provided with a focusing pole voltage. A cavity structure for absorbing spikes is designed on the headers to prevent damage to other components. This chamber structure is the most prone to the problem is that due to the discharge resistance between the electrodes decreased, the focus voltage deviate from the optimal value resulting in blurred images, this point in southern China and humid areas are particularly prominent. The usual method of repair is to open the socket and clean the chamber with alcohol. Even in the replacement of the new tube seat, humidity in the region where the seat tube only a few months.