朋友的MD是SHARP的821,由于此机以前曾从床上摔到过地板上,由此出现了使用外置的AA碱性电池时(电池盒)不能通电,而使用内置香口胶电池的时候却一切正常的问题。但因平时比较少用AA碱性电池,所以对这个问题也没有太多理会。最近却来了大麻烦——不能读取碟片!这个可就不能置之不理了,所以向笔者来救。根据以往的维修经验,可以判断这两个故障的产生原因 Friends of the MD is SHARP 821, as this machine has ever been thrown from the bed on the floor, resulting in the use of external AA alkaline batteries (battery box) can not be energized, but the use of built-in chewing gum battery All normal problems. But usually less AA alkaline batteries, so there is not much to ignore this issue. But recently came a big trouble - can not read the disc! This can not ignore it, so to the author to save. According to the previous maintenance experience, you can determine the causes of these two failures