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一、早期彩电图像模糊故障的原因最常见的原因有:超高压不稳、聚焦电压不对、显像管座变质、显像管老化等。这些部位由于长期处于高压工作环境,元器件容易衰老损坏,加上高压静电吸尘作用,年长月久积尘为患,影响机器的正常工作。这些原因造成的图像模糊,有一个共同的特点,即在无信号的频道上,其荧光屏上的扫描线也不够清晰。除此之外,不同部位还有不同特征,可根据各自症状做进一步查证处理。
First, the early color TV images fuzzy reason for the most common causes are: instability of ultra-high voltage, focusing voltage is wrong, the tube seat deterioration, tube aging and so on. These parts due to long-term high-pressure work environment, components are prone to aging damage, coupled with high-pressure electrostatic vacuum cleaning dust for a long time, affect the normal work of the machine. The common cause of blurring caused by these causes is that the scanning lines on the phosphor screen are not clear enough on unsignalized channels. In addition, there are different characteristics of different parts, according to their own symptoms to do further verification processing.