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G2R-2-SN AC220(S)触摸屏大量现货
四.晶体振荡器
1.通常只能用示波器(晶振需加电)或频率计测试,万用表等无法测量,
否则只能采用代换法了.
2.晶振常见故障有:a.内部漏电,b.内部开路c.变质频偏d.外围相连电
容漏电.这里漏电现象,用<测试仪>的VI曲线应能测出.
3.整板测试时可采用两种判断方法:a.测试时晶振附近既周围的有关
芯片不通过.b.除晶振外没找到其它故障点.
4.晶振常见有2种:a.两脚.b.四脚,其中第2脚是加电源的,注意不可随
意短路.
五.故障现象的分布
1.电路板故障部位的不完全统计:1)芯片损坏30%, 2)分立元件损坏30%,
3)连线(PCB板敷铜线)断裂30%, 4)程序破坏或丢失10%(有上升趋势).
G2R-2-SN AC220(S)触摸屏大量现货
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G2R-2-SN AC220(S)触摸屏大量现货
近日，工业自动化、信息化和数字化转型领域的全球**企业之一罗克韦尔自动化与广东利元亨智能装备股份有限公司(以下简称“利元亨”)正式达成***战略联盟合作。通过此次合作，双方将发挥各自所在领域的专业技术及服务优势，共同开拓海内外新能源市场，打造全流程的数字化工厂，创建可持续的高端装备智能产线，为行业智能运维建设新标杆，持续加速企业数字化转型和“双碳”战略的落地实施，助力全球能源结构转型和产业数字化。 |
