本文分析了LinaTech-CC51动态多叶光栅的运行原理，列举了其常见的3例故障，分别为通讯故障、叶片卡死以及步 进电机卡死。通过分析可能的故障原因，进行逐步排查，分别采取更换Beam板、伺服电机、步进电机将故障快速高效地解 决。本文通过掌握设备原理、观察故障现象和分析报错信息，实现精准高效地定位故障位置，快速排除故障，有力保障动 态多叶光栅开机率和良好的工作状态，为外置动态多叶光栅维修提供参考意义。

In this paper, the operating principle of linatech-CC51 dynamic multileaf collimator was analyzed, and three common failures were listed, which were communication failure, blade stuck and step motor blocked. By analyzing the possible causes of the failure, the fault can be solved step by step, and the Beam plate, servo motor and step motor can be replaced respectively to solve the failure quickly and efficiently. In this paper, by mastering the principle of the equipment, observing the fault phenomenon and analyzing the error information, the precise and efficient fault location was realized, the fault was quickly eliminated, and the open probability and good working state of the dynamic multi-leaf collimator were effectively guaranteed, which provide reference significance for the maintenance of the external dynamic multi-leaf collimator.