SK 2-230数控装置系天津市第三电器开关厂为天津市仪表机床厂DK7740大型数控线切割机床的配套产品。由于该数控装置较目前国内常见的普通“复旦型”分立元件数控装置增设了±4095μm的内外偏自动间隙补偿功能,系统上的元器件全部采用了P沟道增强型5G600系例数字集成电路,同时运算部分的移位寄存器没有用指示灯显示工作状态,所以,给初次接触或习惯维修“复旦型”分立元件控制柜的同志带来了某些不便,碰到故障,往往感到难以下手修理。本文就一些常见故障,通过几个具体故障例子,谈谈检修方法。为了避免混淆,文中所标注的集成元件序号以天津市第三电器开关厂“SK2数控装置原理图册”中 SK 2-230 numerical control device is the third electrical switch factory in Tianjin Tianjin Instrument Machine Tool Plant DK7740 large NC WEDM ancillary products. As the CNC device is more common than the current domestic “Fudan type” discrete components numerical control device added ± 4095μm automatic offset compensation within and outside the partial, all the components on the system using P-channel enhanced 5G600 series of digital integrated circuits, At the same time, the operation part of the shift register does not show the working status with the indicator light. Therefore, it brings some inconveniences to the comrades who are in touch with or accustomed to maintaining the Fudan-type discrete component control cabinet, and often find it hard to start repairing when they encounter a fault. This article on some common failures, through a few specific examples of failures, talk about maintenance methods. In order to avoid confusion, the serial number of the integrated components marked in this paper is based on the “SK2 numerical control schematic diagram” of Tianjin No.3 Electrical Switch Factory