RA—50生化仪在各中、小医院应用极广，但出现问题也极麻烦，现将本人在实际维修中遇到的一例维修经验提供广大用户，仅供参考。故障现象：在开机时自检不通过“显示”RA—50滤光系统检测失灵。处理：查找滤光器轮，未发现有异常，光源也正常。经仔细观察，发现滤光轮系统由一 The RA-50 biochemical analyzer has been widely used in various small and medium-sized hospitals, but the problems are also extremely troublesome. Now, we provide our customers with an example of maintenance experience encountered in actual maintenance and are for reference only. Symptoms: The self-test does not detect failure through the “display” RA-50 filter system at power-on. Treatment: Look for the filter wheel and no abnormalities are found. The light source is also normal. After careful observation, it was found that the filter wheel system consists of a