G2R-2-SN AC220(S)觸摸屏大量現(xiàn)貨
四.晶體振蕩器
1.通常只能用示波器(晶振需加電)或頻率計(jì)測(cè)試,萬(wàn)用表等無(wú)法測(cè)量,
否則只能采用代換法了.
2.晶振常見(jiàn)故障有:a.內(nèi)部漏電,b.內(nèi)部開(kāi)路c.變質(zhì)頻偏d.外圍相連電
容漏電.這里漏電現(xiàn)象,用<測(cè)試儀>的VI曲線應(yīng)能測(cè)出.
3.整板測(cè)試時(shí)可采用兩種判斷方法:a.測(cè)試時(shí)晶振附近既周圍的有關(guān)
芯片不通過(guò).b.除晶振外沒(méi)找到其它故障點(diǎn).
4.晶振常見(jiàn)有2種:a.兩腳.b.四腳,其中第2腳是加電源的,注意不可隨
意短路.
五.故障現(xiàn)象的分布
1.電路板故障部位的不完全統(tǒng)計(jì):1)芯片損壞30%, 2)分立元件損壞30%,
3)連線(PCB板敷銅線)斷裂30%, 4)程序破壞或丟失10%(有上升趨勢(shì)).
G2R-2-SN AC220(S)觸摸屏大量現(xiàn)貨
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G2R-2-SN AC220(S)觸摸屏大量現(xiàn)貨
近日,工業(yè)自動(dòng)化、信息化和數(shù)字化轉(zhuǎn)型領(lǐng)域的全球**企業(yè)之一羅克韋爾自動(dòng)化與廣東利元亨智能裝備股份有限公司(以下簡(jiǎn)稱“利元亨”)正式達(dá)成***戰(zhàn)略聯(lián)盟合作。通過(guò)此次合作,雙方將發(fā)揮各自所在領(lǐng)域的專業(yè)技術(shù)及服務(wù)優(yōu)勢(shì),共同開(kāi)拓海內(nèi)外新能源市場(chǎng),打造全流程的數(shù)字化工廠,創(chuàng)建可持續(xù)的高端裝備智能產(chǎn)線,為行業(yè)智能運(yùn)維建設(shè)新標(biāo)桿,持續(xù)加速企業(yè)數(shù)字化轉(zhuǎn)型和“雙碳”戰(zhàn)略的落地實(shí)施,助力全球能源結(jié)構(gòu)轉(zhuǎn)型和產(chǎn)業(yè)數(shù)字化。 |