不少家庭在收看电视效果不好时,往往因为不能辨别是机子本身还是电视台的故障而去调电视机,结果越调效果越差,甚至影响电视机的使用寿命。那么,怎样才能区分电视台与电视机本身的故障呢?1.观看经微波传送的节目时,有时会出现一片杂波。这种杂波过几秒钟或数分钟会自动消失,图像又好起来。这种情况是由于微波信号中断所造成。2.在收看电视录像节目时,画面中有时会出现一段或几段图像的水平同步失调。这是由于电视台在放映录像节目过程中,某一部分信号失去锁相产生的。3.当电视台播放电影时,时常见到很多竖条和斑点,特别是旧影片更加明显。这是影片本身的划痕造成的,不是电视机的问题。4.收看舞台演出的实况转播时,电视荧屏上的杂波有时会增大,清晰度降低,彩电甚至会失去色彩。这是由于舞台转播灯光较暗,造成节目信号 Many families watch television is not good, often because it can not tell whether the machine itself or the television station to go and tune the TV, the more the more the effect of adjusting the worse, and even affect the service life of the television. So, how can we distinguish between the failure of the TV station and the TV itself? 1. A clutter sometimes appears when watching a program transmitted by microwave. This clutter disappears automatically in seconds or minutes, and the image gets better again. This is due to the interruption of the microwave signal. 2 in watching TV video shows, the screen sometimes appear in one or more paragraphs of the horizontal sync imbalance. This is due to the television station in the process of screening video programs, a part of the signal lost lock phase. 3. When the station broadcast movies, often see a lot of vertical stripes and spots, especially the old movie is more obvious. This is caused by the scratches on the film itself, not a TV problem. 4. When watching the live broadcast of the stage performance, the clutter on the television screen sometimes increases, the definition decreases, and the color TV even loses its color. This is due to the dim light broadcast on the stage, resulting in program signals