R88M-K1K530C-B-Z伺服電機(jī)
在無任何原理圖狀況下要對一塊比較陌生的電路板進(jìn)行維修，以往的所謂“經(jīng)驗(yàn)”就難有作為，盡管硬件功底深厚的人對維修充滿信心，但如果方法不當(dāng)，工作起來照樣事倍功半。那么，怎樣做才能提高維修效呢？根據(jù)我公司進(jìn)口設(shè)備維修中心統(tǒng)計(jì)出來的資料，應(yīng)遵循以下幾個(gè)步驟、按順序有條不紊的進(jìn)行。
方法一：先看后量
使用工具：萬用表、放大鏡
當(dāng)手拿一塊待修的電路板，良好的習(xí)慣首先是應(yīng)對其進(jìn)行目測，必要時(shí)還要借助放大鏡，看什么呢？
主要看：
1、是否有斷線；
2、分力元件如電阻、電解電容、電感、二極管、三極管等時(shí)候存在斷開現(xiàn)象；
3、電路板上的印制板連接線是否存在斷裂、粘連等；
4、是否有人修過？動(dòng)過哪些元器件？是否存在虛焊、漏焊、插反等操作方面的失誤；
在確定了被修無上述狀況后，首先用萬用表測量電路板電源和地之間的阻值，通常電路板的阻值都在70-80？以上，若阻值太小，才幾個(gè)或十幾個(gè)歐姆，說明電路板上有元器件被擊穿或部分擊穿，就必須采取措施將被擊穿的元器件找出來。具體辦法是給被修板供電，用手去摸電路板上各器件的
溫度，燙手的講師重點(diǎn)懷疑對象。若阻值正常，用萬用表測量板上的阻、二極管、三極管、場效應(yīng)管、撥段開關(guān)等分力元件，其目的就是首先要確保測量過的元件是正常的，我們的理由是，能用萬用表解決的問題，就不要把它復(fù)雜化。
R88M-K1K530C-B-Z伺服電機(jī)
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見證產(chǎn)業(yè)精彩
第100屆中國電子展立足長三角電子信息產(chǎn)業(yè)協(xié)同發(fā)展圈，聚焦熱門技術(shù)應(yīng)用，吸引全行業(yè)代表企業(yè)領(lǐng)銜亮相，設(shè)置基礎(chǔ)電子元器件、集成電路、汽車電子、工業(yè)互聯(lián)網(wǎng)、特種元器件暨自主創(chuàng)新示范展區(qū)，全方位展示各領(lǐng)域創(chuàng)新技術(shù)產(chǎn)品，見證產(chǎn)業(yè)精彩。
“無器件，不產(chǎn)品”，電子元器件行業(yè)總產(chǎn)值約占我國電子信息產(chǎn)業(yè)的1/5，基礎(chǔ)電子元器件展區(qū)也是歷屆中國電子展的王牌展區(qū)之一。第100屆中國電子展的基礎(chǔ)電子元器件展區(qū)更是星光熠熠，磁性材料產(chǎn)業(yè)“國家隊(duì)”中國科學(xué)院寧波材料技術(shù)與工程研究所、國內(nèi)表面貼裝式壓電石英晶體元器件行業(yè)龍頭企業(yè)廣東惠倫晶體科技股份有限公司、擁有國際的技術(shù)設(shè)備及管理模式的寧波宏武航空科技有限公司、擁有半導(dǎo)體上下游整合與自有核心技術(shù)優(yōu)勢的深圳市安邦半導(dǎo)體有限公司等電子元器件領(lǐng)域行業(yè)龍頭紛紛亮相。
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