故障现象:当接收到电视信号时,图像“雪花”点多,伴音中噪声大,整幅画面不定期出现行扭、行抖动,同时,图像左右边出现不规则的锯齿、扇形暗条带,行扭出现时,图像颜色也不稳定,时好时坏。检修:根据故障现象,起初认为是图像通道故障引起的。花费了许多的精力和时间,可毫无收获。为了缩小故障范围,用一台好电视机的视频输入连接该机的 Symptoms: When receiving a television signal, the image “snow” and more noise in the sound, the entire picture from time to time appear twisting line jitter, at the same time, there are irregular serrated left and right edges of the image, When the line is twisted, the color of the image is unstable, so it is good and bad. Maintenance: According to the fault phenomenon, initially thought to be caused by the image channel fault. Spent a lot of energy and time, there is no gain. In order to narrow the fault range, with a good TV video input connected to the machine