ＹＯＳＨＩＤＡ“ＵＹ”牙科综合治疗机是日本八十年代的先进产品。笔者在本刊第二十三卷第二期曾介绍了四例该机的常见故障，近年来，随着使用时间的增多，又发现了许多新的故障，本文将这些故障总结成十大典型故障并介绍它们的分析及处理方法。故障实例如下：故障现象一：冲 YOSHIDA “UY” dental treatment machine is Japan’s advanced products of the eighties. In the twenty-third volume of the twenty-third issue of the author has introduced four cases of the common failure of the aircraft, in recent years, with the increase of the use of time, but also found many new failures, this paper summarizes these failures into ten typical Faults and introduce their analysis and processing methods. Examples of failures are as follows: Failure phenomenon: Chong