一些触碰不好的故障,可在光源较暗处观查异常部件是否有火花产生来确定（
Some malfunctions with poor touch can be determined by observing abnormal components in a dark light source to see if sparks are generated（
听：听音,在控制系统中,大都使用了变阻器做为控制件,在继电器触点转换时会产生清晰的“滴哒”声。如无音或异常,在确定继电器驱动电器无故障后,可判断该继电器不好。
Listen: In control systems, most use rheostats as control components, which produce a clear "clicking" sound when the relay contacts switch. If there is no sound or abnormality, it can be determined that the relay is not working properly after confirming that there is no fault in the relay driving device.
摸：触碰,在伸缩门的检修情况下,也常常在通电完用手摸（鼻嗅）一些元件。如稳压IC等集成器件、避雷的管、变压器、驱动二级管等等,便于感觉其温度是否正常,如发热快、温度高、电路无短路故障则可判断器件不好（注意：针对高电压的元件如晶闸管、髙压区域元器件,应通电一段时间再断电后快速触碰,切忌通电时触碰,防止安全事故）。
Touch: In the maintenance of telescopic doors, it is also common to touch (sniff) some components by hand after power on. Integrated devices such as voltage stabilizing ICs, lightning protection tubes, transformers, driver diodes, etc., are easy to feel if their temperature is normal. If the heating is fast, the temperature is high, and there is no short circuit fault in the circuit, it can be judged that the device is not good. (Note: For high voltage components such as thyristors and high voltage area components, they should be powered on for a period of time and then quickly touched after power outage. Avoid touching when powered on to prevent safety accidents).
测：测量,指应用万.能表拧到合适挡位,对控制电路开展有关测量。一般选用的方式有测电压、测电路的电阻、测电流等。这是一种综合型逻辑分析方式,可根据各种测量数据准备的找到故障原因及毁坏器件。
Measurement: Measurement refers to the application of a multimeter to the appropriate gear to perform relevant measurements on the control circuit. The commonly used methods include voltage measurement, circuit resistance measurement, current measurement, etc. This is a comprehensive logical analysis method that can be prepared based on various measurement data to identify the cause of faults and damage components.