R88M-K1K530C-B-Z伺服電機
在無任何原理圖狀況下要對一塊比較陌生的電路板進行維修,以往的所謂“經驗”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,工作起來照樣事倍功半。那么,怎樣做才能提高維修效呢?根據我公司進口設備維修中心統(tǒng)計出來的資料,應遵循以下幾個步驟、按順序有條不紊的進行。
方法一:先看后量
使用工具:萬用表、放大鏡
當手拿一塊待修的電路板,良好的習慣首先是應對其進行目測,必要時還要借助放大鏡,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、三極管等時候存在斷開現象;
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,才幾個或十幾個歐姆,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、場效應管、撥段開關等分力元件,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,就不要把它復雜化。
R88M-K1K530C-B-Z伺服電機
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見證產業(yè)精彩
第100屆中國電子展立足長三角電子信息產業(yè)協(xié)同發(fā)展圈,聚焦熱門技術應用,吸引全行業(yè)代表企業(yè)領銜亮相,設置基礎電子元器件、集成電路、汽車電子、工業(yè)互聯網、特種元器件暨自主創(chuàng)新示范展區(qū),全方位展示各領域創(chuàng)新技術產品,見證產業(yè)精彩。
“無器件,不產品”,電子元器件行業(yè)總產值約占我國電子信息產業(yè)的1/5,基礎電子元器件展區(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電子元器件展區(qū)更是星光熠熠,磁性材料產業(yè)“國家隊”中國科學院寧波材料技術與工程研究所、國內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、擁有國際的技術設備及管理模式的寧波宏武航空科技有限公司、擁有半導體上下游整合與自有核心技術優(yōu)勢的深圳市安邦半導體有限公司等電子元器件領域行業(yè)龍頭紛紛亮相。
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