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电视机使用年久了,由于高压静电长期积尘,高压帽或尾座聚焦盒的材质老化以及环境潮湿,电视机极易产生打火或散焦变暗的故障现象。而维修人员大都是采用更换高压帽或尾座聚焦盒的方法,或者用无水酒精清洁处理一下。并涂以灭弧灵之类的绝缘酯膏,一般来说,此类故障都能顺利排除。但是,购换的器件需要注意其产品的质量如何。只为了单图价格便宜,如果购买的器件为劣质次品,即生产厂家制造器件所选用的材质绝缘性能达不到耐高压的标准,或生产制作工艺不符合要求等因素,必然会造成所更换的器件使用时间不会太长,故障就“故技重演”。
TV use for a long time, due to long-term high-voltage electrostatic dust, high-pressure cap or tailstock focusing box material aging and humid environment, the TV is prone to sparking or defocus dark phenomenon. The maintenance staff are mostly used to replace the high-pressure cap or tailstock focusing box approach, or clean with anhydrous alcohol treatment. And coated with arc-extinguishing Ling kind of insulation ester paste, in general, such failures can be successfully ruled out. However, replacement devices need to be aware of the quality of their products. Only a single figure cheap, if the purchase of inferior devices for the device, that is, manufacturers of materials used in the manufacture of components of the insulation resistance does not meet the high pressure standards, or production of non-compliance with the requirements and other factors, will inevitably result in the replacement The use of the device will not be too long, the failure of “technical repeat.”