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由于长期使用劣质录像带，录像机的视频磁头容易被脱落的磁粉堵住。当录、放像时，对于视频信号不能正常记录和重放。重放磁带时，在电视机上看不到图像，只是一片噪波，或重放图像上有很多噪波点，有时还伴有图像无彩色、扭曲失真等现象。同样，录像机对于视频信号也不能进行?
Due to the long-term use of inferior video tapes, VCR video heads are easily blocked by dropped magnetic particles. When recording, playback, the video signal can not be properly recorded and replayed. When you play back a tape, you can not see the picture on the TV, just a noise, or there are many noise points on the playback picture. Sometimes the picture is accompanied by no color, distorted distortion and so on. Similarly, the video recorder for video signals can not be carried out?