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许多人在收看闭路电视节目时，只要出现图像问题，就盲目调整电视机，分不清是电视信号质量问题还是电视机自身有问题，结果不仅改变不了收看效果，反而还影响了电视机的使用寿命。那么，怎样判断是电视信号还是电视机的故障呢？电视信号的原因：（１）一部分频道节目的图象不
Many people watching television closed-circuit television programs, as long as there is an image problem, they blindly adjust the TV, can not tell the difference between the quality of the television signal or television itself, the result not only can not change the watch, but also affect the use of television life. So, how to determine the failure of the television signal or the TV? TV signal causes: (1) part of the channel program’s image is not