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有不少电视机在收看节目时基本正常,有时出现上摆头现象。故障发生时,图像上部左右摆动不止,越靠顶部越严重,而图像中、下部分则基本稳定。尤其是用录像机重放质量较差的磁带时,不但图像顶部出现摆动,有时
There are quite a few TV sets that are basically normal when watching a program and sometimes appear on the head. When a fault occurs, the upper part of the image swings more than the left and right, the more severe the top is, and the lower part of the image is basically stable. Especially when playing back a poor quality tape with a video recorder, not only wobbles appear on the top of the image but sometimes