IC200CPUE05CA 卡件
在無任何原理圖狀況下要對(duì)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(duì)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(duì)其進(jìn)行目測(cè),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(cè)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(duì)象。若阻值正常,用萬用表測(cè)量板上的阻、二極管、三極管、場(chǎng)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(cè)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。
IC200CPUE05CA 卡件
IC200ALG266CA |
IC200EBI001LT |
IC200ALG230CA |
IC200PNS001LT |
IC200CHS025 |
IC200CHS014 |
IC200MDL750LT |
IC200MDL742LT |
IC200PWB001 |
IC200PWR001LT |
IC200DEM001 |
IC200PNS002CA |
IC200MDL730 |
IC200CPUE05CA |
IC200CBL601 |
IC200ALG432 |
IC200BEM002 |
IC200ALG430LT |
IC200ALG620 |
IC200ALG320CA |
IC200ALG331 |
IC200ALG327 |
IC200ALG261 |
IC200CHS006 |
IC200MDL930 |
IC200MDL643 |
IC200CPU001LT |
IC200CBL105 |
IC200MDL640 |
IC200ALG326 |
IC200CHS101 |
IC200CHS112 |
IC200PWB001LT |
IC200MDL740 |
IC200PNS001CA |
IC200DBI001 |
IC200MDL730CA |
IC200BEM003 |
IC200MDL635 |
IC200MDL240LT |
IC200ALG322 |
IC200ALG262 |
IC200MDD844CA |
IC200ALG240 |
IC200MDL750 |
IC200CHS001 |
IC200BEM103 |
IC200CBL110 |
IC200MDL330 |
IC200ALG431LT |
IC200MDL141 |
IC200MDL744 |
IC200MDD844LT |
IC200MDL631 |
IC200MDD851 |
IC200ALG320LT |
IC200MDD841CA |
IC200MDL741LT |
IC200CHS006CA |
IC200ALG432LT |
IC200ALG620CA |
IC200MDD848 |
IC200MDD840 |
IC200SET001 |
IC200ALG230 |
IC200CHS022 |
IC200MDL930CA |
IC200CBL602 |
IC200PWR002CA |
IC200MDL741 |
IC200CBL002 |
IC200MDD841 |
IC200CHS111 |
IC200MDL940 |
IC200MDL650 |
IC200MDL640LT |
IC200MDL640CA |
IC200ALG331CA |
IC200MDD849 |
IC200MDD845 |
IC200ALG264CA |
IC200MDD844 |
IC200CHS102 |
IC200CBL615 |
IC200MDL750CA |
IC200CPU001 |
IC200MDL636 |
IC200CBL001 |
IC200MDL244 |
IC200ALG620LT |
IC200MDL240 |
IC200TBM002 |
IC200MDD846LT |
IC200ALG260LT |
IC200CMM020 |
IC200MDL331 |
IC200BEM002CA |
IC200MDL632 |
IC200ALG328 |
IC200ALG262CA |
IC200ALG260 |
IC200ALG321 |
IC200MDL940LT |
IC200CHS003 |
IC200CHS002CA |
IC200MDL742 |
IC200PWB001CA |
IC200ACC001 |
IC200CBL230 |
IC200CHS022CA |
IC200MDL743 |
IC200CHS011 |
IC200MDL650CA |
IC200PNS002 |
IC200MDL329 |
IC200ALG430 |
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