本文主要通过介绍迈瑞DP-50便携式超声显示器故障的维修过程，总结维修经验，为类似故障提供参考。我院所使 用的DP-50便携式超声系统显示器有时会出现水平方向的一条带状亮线，通过故障现象确定该故障位置为显示器场扫描电 路，最终通过检测发现故障为自举电容C2，更换该元件后恢复正常。对于类似故障，维修人员需要在熟悉设备电路图的基 础上，根据故障现象进行定位，以便于迅速找到故障原因并排除

Through the analysis of the maintenance process of Mindary DP-50 portable ultrasonic system display, this paper aims to summarize maintenance experience and provide reference for similar faults. There was a horizontal bright line on the DP-50 display in our hospital occasionally, the fault was located on display scanning filed circuit through analysis of the fault phenomenon, and then the fault was located on bootstrap capacitor C2 through further detection, and the fault was solved by replacing a new bootstrap capacitor C2. When facing similar faults, maintenance personnel should locate fault on the basis of being familiar with device circuit and according to fault phenomenon, in order to find and solve the problem quickly.