1734-TOP plc
雙棒VI曲線掃描功能對(duì)兩塊板進(jìn)行好、壞對(duì)比測(cè)試,起始的對(duì)比點(diǎn)可以從端口開(kāi)始,然后由表及里,尤其是對(duì)電容的對(duì)比測(cè)試,可以彌補(bǔ)萬(wàn)用表在線難以測(cè)出是否漏電的缺憾。
:先易后難
使用工具:電路在線維修儀、電烙鐵、記號(hào)筆
為提高測(cè)試效果,在對(duì)電路板進(jìn)行在線功能測(cè)試前,應(yīng)對(duì)被修板做一些技術(shù)處理,以盡量削弱各種干擾對(duì)測(cè)試進(jìn)程帶來(lái)的負(fù)面影響。具體措施是:
1、測(cè)試前的準(zhǔn)備
將晶振短路,對(duì)大的電解電容要焊下一條腳使其開(kāi)路,因?yàn)殡娙莸某浞烹娡瑯右材軒?lái)干擾。
2、采用排除法對(duì)器件進(jìn)行測(cè)試
對(duì)器件進(jìn)行在線測(cè)試或比較過(guò)程中,凡是測(cè)試通過(guò)(或比較正常)的器件,請(qǐng)直接確認(rèn)測(cè)試結(jié)果,以便記錄;對(duì)測(cè)試未通過(guò)(或比較超差)的,可再測(cè)試一遍,若還是未通過(guò),也可先確認(rèn)測(cè)試結(jié)果,就這樣一直測(cè)試下去,直到將板上的器件測(cè)試(或比較)完,然后再回過(guò)頭來(lái)處理那些未通過(guò)測(cè)試(或比較超差)的器件。對(duì)未通過(guò)功能在線測(cè)試的器件,儀器還提供了一種不太卻又比較實(shí)用的處理方法,由于儀器對(duì)電路板的供電可以通過(guò)測(cè)試夾施加到器件相應(yīng)的電源與地腳,若對(duì)器件的電源腳實(shí)施刃割,則這個(gè)器件將脫離電路板供電系統(tǒng),這時(shí)再對(duì)該器件進(jìn)行在線功能測(cè)試,由于電路板上的其他器件將不會(huì)再起干擾作用,實(shí)際測(cè)試效果等同于“準(zhǔn)離線”,測(cè)準(zhǔn)率將獲得很大提高。
3、用ASA-VI曲線掃描測(cè)試對(duì)測(cè)試庫(kù)尚未涵蓋的器件進(jìn)行比較測(cè)試
由于ASA-VI智能曲線掃描技術(shù)能適用于對(duì)任何器件的比較測(cè)試,只要測(cè)試夾能將器件夾住,再有一塊參照板,通過(guò)對(duì)比測(cè)試,同樣對(duì)器件具備較強(qiáng)的故障偵測(cè)能力。該功能彌補(bǔ)了器件在線功能測(cè)試要受制于測(cè)試庫(kù)的不足,拓展了儀器對(duì)電路板故障的偵測(cè)范圍?,F(xiàn)實(shí)中往往會(huì)出現(xiàn)無(wú)法找到好板做參照的情景,而且待修板本身的電路結(jié)構(gòu)也無(wú)任何對(duì)稱(chēng)性,在這種情況下,ASA-VI曲線掃描比較測(cè)試功能起不了作用,而在線功能測(cè)試由于器件測(cè)試庫(kù)的不完全,無(wú)法完成對(duì)電路板上每一個(gè)器件都測(cè)試一遍,電路板依然無(wú)法修復(fù),這兒就是電路在線維修儀的局限,就跟沒(méi)有包治百病的藥一樣。
:先靜后動(dòng)
由于電路在線維修儀目前只能對(duì)電路板上的器件進(jìn)行功能在線測(cè)試和靜態(tài)特征分析,是否完全修好必須要經(jīng)過(guò)整機(jī)測(cè)試檢驗(yàn),因此,在檢驗(yàn)時(shí)先檢查一下設(shè)備的電源是否按要求正確供給到電路板上。
1734-TOP plc
1763-BA | 1769-ADN | 1771-ASB | 1784-PCIC | 1785-ENET | 1794-ACN15 | 2711P-B10C10D2 |
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1763-L16DWD | 1769-BA | 1771-CD | 1784-PKTX | 1785-L40B | 1794-ADNK | 2711P-B10C1D2 |
1763-MM1 | 1769-ECL | 1771-CE | 1784-PKTXD | 1785-L40C | 1794-AENT | 2711P-B10C1D6 |
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1766-L32AWAA | 1769-IA16 | 1771-HD | 1784-U2DN | 1785-L46C15 | 1794-IA8 | 2711P-B10C4A9 |
1766-L32BWA | 1769-IA8I | 1771-HDP | 1785-ENET | 1785-L60B | 1794-IA8I | 2711P-B10C4D2 |
1766-L32BWAA | 1769-IF16C | 1771-HODS | 1785-L20B | 1785-L60L | 1794-IB10XOB6 | 2711P-B10C4D8 |
1766-L32BXB | 1769-IF16V | 1771-HRA | 1785-L20E | 1785-L80B | 1794-IB16 | 2711P-B10C4D9 |
1766-L32BXBA | 1769-IF4 | 1771-HS3A | 1785-L40B | 1785-L80C | 1794-IB16D | 2711P-B12C10D2 |
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1768-CNB | 1769-IF8 | 1771-HSAR | 1785-L40C15 | 1785-L80E | 1794-IB32 | 2711P-B12C1D2 |
1768-CNBR | 1769-IG16 | 1771-HSARS | 1785-L40E | 1785-L86B | 1794-IB8 | 2711P-B12C1D6 |
1768-ENBT | 1769-IM12 | 1771-HSN | 1785-L60B | 1785-L11B | 1794-IC16 | 2711P-B12C4A6 |
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1X00093H08 | 5460-840 | ZX2-XC4R | R88M-GP10030H-BS2-Z | 0-48680-530 |
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1X00377H01 | 5461-086 | ZX-EM02T | R88M-GP10030T-BS2-Z | 0-49001-14 |
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3A99989H06 | 5461-650 | ZX-GTC11 | R88M-GP20030T-BO-Z | 0-49007-4 |
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4D33888G01 | 5461-653 | ZX-LD100L | R88M-GP20030T-OS2-Z | 0-49008-3 |
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5A22410H01 | 5461-768 | ZX-LD40L | R88M-GP40030H-BS2-Z | 0-49009-14 |
5A22410H02 | 5461-769 | ZX-LD40L 2M | R88M-GP40030H-B-Z | 0-49010-1 |
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5A22727G02 | 5461-772 | ZX-LDA11-N 2M | R88M-GP40030H-S2-Z | 0-49011-6 |
5A22727G03 | 5461-773 | ZX-LDA41 2M | R88M-GP40030H-Z | 0-49011-6A |
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5A22982G02 | 5461-776 | ZX-LT001 | R88M-GP40030T-BS2-Z | 0-49012 |
5A22982G03 | 5461-777 | ZX-LT005 | R88M-GP40030T-B-Z | 0-49012-A |
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