自动伸缩门维修的五项原则都有哪些？ 问：了解型号，产品名字，毁坏原因，故障现象，详细分析，做到有的放矢，关键询问的内容有：何时毁坏，是否浸泡，是否受过撞击，是否电压过高，是否有人改动，是否操作不当，是否遭受雷击，是否有冒气状况，是否有异常响声等。只有在问明原因后,才能确定下一步的检修方法及处理措施。针对雷击、浸泡、起烟、烧保险等故障型号,切勿贸然通电调试,不然将导致设备再次挫裂、故障扩大。
What are the five principles for repairing automatic retractable doors? Question: Understand the model, product name, cause of damage, fault phenomenon, and conduct a detailed analysis to achieve targeted results. The key questions include: when the damage occurred, whether it was soaked, whether it was hit, whether the voltage was too high, whether it was modified, whether it was improperly operated, whether it was hit by lightning, whether there was any gas emission, and whether there was any abnormal noise. Only after inquiring about the cause can the next maintenance method and handling measures be determined. For faulty models such as lightning strikes, soaking, smoking, and fuse burning, do not hastily power on for debugging, otherwise it will cause the equipment to crack again and the fault will expand.
看：开启伸缩门和道闸控制机壳,仔细查看电路板上是否有元件受损。如元件断裂、变黑变黄、引脚碰撞、器件松脱、连线错误等。有经验的维修人员会根据客户提供的相关信息及故障现象,准确地查看伸缩门异常位置,找到故障所在。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（
Look: Open the telescopic door and gate control housing, and carefully check if any components on the circuit board are damaged. Such as component breakage, blackening and yellowing, pin collisions, component loosening, wiring errors, etc. Experienced maintenance personnel will accurately check the abnormal position of the telescopic door and locate the fault based on the relevant information and fault symptoms provided by the customer. 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.