商铺名称:厦门盈亦自动化科技有限公司
联系人:刘莉(小姐)
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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,请说是在线缆网上看到的,谢谢!
140G-J6F3-D20电源
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。
140G-J6F3-D20电源
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140G-JTC4-C63 |
140G-JTC4-C70 |
140G-JTF3-C80 |
140G-JTF3-C90 |
140G-JTF3-D10 |
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140G-JTF3-D12 |
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140G-JTH3-C40 |
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深圳市市委、市政府党组成员郑红波在大会上指出,深圳高度重视5G发展,坚持高强度投入、高标准建设,着力打造5G网络能效优质的建设标杆、5G技术先进的创新高地、5G应用融合的先行典范、5G产业链完备的世界级产业集聚区。接下来,深圳将继续以先行示范的责任与担当,进一步推动5G技术创新与产业融合双向赋能。
大会还举办了第五届“绽放杯”5G应用征集大赛颁奖典礼,并发布了《5G应用创新发展白皮书(2022年)》、《5G增强技术研发试验测试工作进展》、《5G-Advanced白皮书——场景需求与关键技术》、《5G-Advanced通感融合网络架构研究报告》等行业重磅成果,全方位、多角度地展现了5G最新研究成果。
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