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故障现象:图像四周向里缩小,到屏幕边形成3cm宽的黑色镶边。有时候在缩小的屏幕里有图像,而无图像时满屏幕为淡绿色,伴有均匀的细白线,无噪点、无字符,但伴音正常。据用户说,这台彩电经多家修理都没有修好,本人抱有试试看的想法,接收了这台电视机。分析与检修:打开机后壳观察,
Symptoms: the image shrinks in all directions, to the screen to form a 3cm wide black trim. Sometimes there is an image in the reduced screen, but no image when the screen is light green, with a fine white line, no noise, no characters, but the sound is normal. According to the user, this TV has not been repaired by more than one fix, I have the idea of trying to receive this TV. Analysis and Maintenance: Open the machine after the shell observation,