故障表现为:三无(灯不亮) 检修及分析:拆机测量24V输入正常,而12V无输出,更换U851(MP1593),12V仍无输出,后测U851的8脚外接C856漏电,换之故障机修到这里,终于修好值得探讨。。 |
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