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问:我们在电视机的修理中遇到这样一个问题:一台“开封KD12-1”电视机在第一天晚上开启后约二小时左右听见啪啪声,但图象伴音正常,在啪啪声同时荧光屏上出现少许如米粒大小的亮点,半小时后节目播完,关机。第二天晚上,开机后约两分钟无光栅、图象,但伴音正常,又发现有啪啪声,同时发现显像管颈尾端内部有打火火花,立即关机。事后认为
Q: We have encountered such a problem in the repair of TV sets: a “Kaifeng KD12-1” TV set heard about popping up for about two hours after its first night of operation, but the sound of the picture was normal. Sound at the same time a little screen, such as the size of a bright spot on the screen, after half an hour broadcast sowing, shut down. The next night, about two minutes after boot without grating, the image, but the sound is normal, but also that there are pops, and found that there is sparking inside the end of the imaging neck, immediately shut down. After the thought