故障现象:开机有光栅、伴音,但图像扭曲,十几秒钟后“自动关机”。分析与检修:从扭曲的图像上看是300V 滤波电容失效所致。拆下电容 C401发现已被前一维修者更换为180μF/400V,同时测其容量也降至10μF,根据图标参数将其更换为470μF/450V 后开机几秒钟后又“自动关机”(此时可听见短暂的伴音,也产生了高压,但光栅还没有来得及出现)。由于开机时间太短,故无法进行有效的测量。 Symptoms: boot raster, sound, but the image is distorted, after ten seconds “automatic shutdown.” Analysis and Overhaul: From a distorted image, the 300V filter capacitor fails. Remove the capacitor C401 was found to have been replaced by the previous maintenance of 180μF / 400V, while measuring the capacity also dropped to 10μF, according to the icon parameters to replace it 470μF / 450V boot a few seconds and then “automatic shutdown” (at this time Can hear the brief sound, but also produced a high pressure, but the grating has not had time to appear). Due to the boot time is too short, it can not be effective measurement.