商铺名称:厦门盈亦自动化科技有限公司
联系人:刘莉(小姐)
联系手机:
固定电话:
企业邮箱:3001679289@qq.com
联系地址:厦门市集美区杏林禹州中央海岸一期5号楼923室
邮编:361022
联系我时,请说是在电子快手网上看到的,谢谢!
R88M-K1K530C-B-Z伺服电机
在无任何原理图状况下要对一块比较陌生的电路板进行维修,以往的所谓“经验”就难有作为,尽管硬件功底深厚的人对维修充满信心,但如果方法不当,工作起来照样事倍功半。那么,怎样做才能提高维修效呢?根据我公司进口设备维修中心统计出来的资料,应遵循以下几个步骤、按顺序有条不紊的进行。
方法一:先看后量
使用工具:万用表、放大镜
当手拿一块待修的电路板,良好的习惯首先是应对其进行目测,必要时还要借助放大镜,看什么呢?
主要看:
1、是否有断线;
2、分力元件如电阻、电解电容、电感、二极管、三极管等时候存在断开现象;
3、电路板上的印制板连接线是否存在断裂、粘连等;
4、是否有人修过?动过哪些元器件?是否存在虚焊、漏焊、插反等操作方面的失误;
在确定了被修无上述状况后,首先用万用表测量电路板电源和地之间的阻值,通常电路板的阻值都在70-80?以上,若阻值太小,才几个或十几个欧姆,说明电路板上有元器件被击穿或部分击穿,就必须采取措施将被击穿的元器件找出来。具体办法是给被修板供电,用手去摸电路板上各器件的
温度,烫手的讲师重点怀疑对象。若阻值正常,用万用表测量板上的阻、二极管、三极管、场效应管、拨段开关等分力元件,其目的就是首先要确保测量过的元件是正常的,我们的理由是,能用万用表解决的问题,就不要把它复杂化。
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见证产业精彩
第100届中国电子展立足长三角电子信息产业协同发展圈,聚焦热门技术应用,吸引全行业代表企业领衔亮相,设置基础电子元器件、集成电路、汽车电子、工业互联网、特种元器件暨自主创新示范展区,全方位展示各领域创新技术产品,见证产业精彩。
“无器件,不产品”,电子元器件行业总产值约占我国电子信息产业的1/5,基础电子元器件展区也是历届中国电子展的王牌展区之一。第100届中国电子展的基础电子元器件展区更是星光熠熠,磁性材料产业“国家队”中国科学院宁波材料技术与工程研究所、国内表面贴装式压电石英晶体元器件行业龙头企业广东惠伦晶体科技股份有限公司、拥有国际的技术设备及管理模式的宁波宏武航空科技有限公司、拥有半导体上下游整合与自有核心技术优势的深圳市安邦半导体有限公司等电子元器件领域行业龙头纷纷亮相。
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