美的微波炉磁控管2M219K能用格兰仕磁控管OM75SGAL01代换吗

2025-01-22 08:13:07
推荐回答(2个)
回答1:

微波炉检修
故障检查
微波炉使用中会发生刚接通电源,保险丝即熔断的故障。现介绍该故障的排除方法。
微波炉电路分电源控制系统和高压系统两部分。检修时可以高压变压器为界,先断开次级电路,以便迅速判断故障部位,同时保证检修安全。
先打开微波炉外壳,找到高压变压器与高压电容器,由于次级电路是用接插件连接的,所以只需拔下插件即可,十分方便。此时更换保险丝通电,会出现以下两种情况。
(1)通电后风机及托盘运转均正常。这表明电源控制系统及变压器完好,故障在高压系统中。可继续检查高压电容器和高压硅堆,如果发现高压电容器已击穿,就说明机内保险丝烧断的原因是变压器次级短路电流过大。更换同规格的电容器后,故障即可排除。
(2)通电后机内保险丝再次烧断。由此可判断高压电路系统正常,故障发生在变压器本身或电源控制电路中。可拔下变压器初级电路一端的插件,通电后若风机、托盘运转正常,说明变压器损坏。故障原因可能是变压器绕组匝间短路,更换变压器故障即可排除。若拔下变压器初级电路的插件后,通电机内保险丝仍熔断,则故障肯定发生在电源控制系统中。故障原因可能是联锁开关、监控开关损坏、电源线或导线严重漏电甚至短路所致。这些元件只要通过简单检查,即可发现故障所在,排除或更换元件后,微波炉即可恢复正常工作。
维修技巧
第一,在拆机维修前,必须先对与安全相关的部位和零部件进行检查,主要是看炉门能否紧闭、门隙是否过大、观察窗是否破裂、炉腔及外壳上的焊点有否脱焊、炉门密封垫是否缺损及凹凸不平等。这主要是检查是否存在微波过量泄漏的可能。若发现问题,应先行修复;若因缺件或其他原因而暂时不能修复,可以先修机内其他故障,但修好其他故障后不要勉强使用,更不可交付用户使用,务必完全排除了安全隐患后才能交货。
第二,如果需要检查机内电路,通常应该在断电后再拆卸微波炉。拆机后,先用塑胶绝缘柄改锥将高压电容两端短路放电,以免维修时不慎遭受电击。这是因为微波炉断电后,高压电容上仍可能存在较高的电压,尤其是断电不久的炉子更是如此,千万别以为断电后就安全了。
第三,除了测量220V市电电压等检查外,在没有十分把握的情况下,应尽量不作开机带电检查。如果确实需要通电检查,必须先断开高压电路,不让磁控管工作,然后再开机检查,以确保人身安全。至于磁控管及其供电电路的检查,除非你具有必要的专业维修设备知识和经验,否则应采用断电检查方式,以确保安全。实践表明,只要掌握相关技巧要领,断电检查并不比通电检查差多少,判断有些故障的速度甚至优于通电检查。
第四,维修中需要对零部件进行拆卸检查或更换时,拆件时要逐个记住所拆卸零部件的原位置,特别是安全机构和高压电路的零部件更要重视,并且拆卸后要放置好,以防止丢失,造成不必要的麻烦;重装时应逐个准确复位装好,并拧紧每个紧固螺丝和其他紧固件,不要装错,或遗漏安装垫圈等易忽视的小零件。若需更换零部件,注意尽量选用原型号配件。如果没有,可用相似特性和安装尺寸的代换件进行代换。
第五,维修完毕,全部安装好所有零部件后,应再一次检查炉门是否能灵活开关,同时注意查看门隙、门垫及观察窗等是否有异常状况,还有各调节钮和开关等零部件是否正常,直到确认没有问题了才可开始使用。

回答2:

可以

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