傳感器IC200UEX011
工業(yè)電路板維修技巧
不能過(guò)分依賴(lài)在線(xiàn)測(cè)試儀
1.功能測(cè)試不能代替參數(shù)測(cè)試
2. 功能測(cè)試僅能測(cè)試到器件的截止區(qū),放大區(qū)和飽和區(qū),但無(wú)法了解此時(shí)的工作頻率的高低和速度的快慢。
3. 對(duì)數(shù)字芯片而言,僅知道有高低電平的輸出變化,但無(wú)法查出它的上升和下降沿的變化速度。
4. 對(duì)于模擬芯片,它處理的是模擬的變化量。其受電路的元器件的分布,解決信號(hào)方案的不同的影響,是錯(cuò)綜復(fù)雜的。就目前的在線(xiàn)測(cè)試技術(shù),要解決模擬芯片在線(xiàn)測(cè)試是不可能的。所以,這項(xiàng)功能測(cè)試的結(jié)果,僅能供參考。
5. 大多數(shù)的在線(xiàn)測(cè)試議,在對(duì)于電路板上的各類(lèi)芯片進(jìn)行功能測(cè)試后,均會(huì)給出“測(cè)試通過(guò)”或“測(cè)試不通過(guò)”。那么它為什么不給出被測(cè)器件是否有問(wèn)題呢?這就是這類(lèi)測(cè)試儀的缺撼。因?yàn)樵诰€(xiàn)測(cè)試時(shí),所受影響(干擾)的因素太多。要求在測(cè)試前采取不少的措施(如斷開(kāi)晶振,去掉CPU和帶程序的芯片,加隔離中斷信號(hào)等等),這樣做是否均有效,值得研究。至少,目前的測(cè)試結(jié)果有時(shí)不盡人意。
6. 了解在線(xiàn)測(cè)試儀的讀者,均知道有這么一句行話(huà)?!霸诰€(xiàn)測(cè)試時(shí)不通過(guò)的芯片不一定是損壞的;測(cè)試通過(guò)的芯片一定是沒(méi)有損壞的?!彼慕忉尀?,如器件受在線(xiàn)影響或抗干擾時(shí),結(jié)果可能不通過(guò),對(duì)此不難理解。那么,是否損壞的芯片在進(jìn)行測(cè)試時(shí),均會(huì)得出“不通過(guò)”呢?回答確實(shí)不能肯定。筆者與同行均遇到過(guò),明明芯片已損壞了(確切地說(shuō)換上這個(gè)芯片板子就不工作了),但測(cè)試結(jié)果是通過(guò)的。權(quán)威解釋為這是測(cè)試儀自身工作原理(后驅(qū)動(dòng)技術(shù))所致。故此我們不能過(guò)分依賴(lài)在線(xiàn)測(cè)試儀(盡管各廠(chǎng)家宣傳的很玄)的作用,否則將使維修電路板的工作誤入歧途。
傳感器IC200UEX011
IC200UDR164 | IC200CBL600 |
IC200UDR040 | IC200CBL510 |
IC200PWB001 | IC200CBL545 |
IC200DTX200 | IC200CBL550 |
IC200PWR002 | IC200UAR028 |
IC200DEM004 | IC200CBL525 |
IC200DEM001 | IC200MDL741 |
IC200PKG103 | IC200UAL005 |
IC200UDR140 | IC200CBL520 |
IC200UDR064 | IC200MDL650 |
IC200UDR006 | IC200UAA007 |
IC200DEM064 | IC200MDL643 |
IC200PKG101 | IC200CBL601 |
IC200PKG001 | IC200CBL500 |
IC200PBI001 | IC200CHS012 |
IC200DBI001 | IC200CBL230 |
IC200UDR010 | IC200CBL501 |
IC200PKG010 | IC200CBL120 |
IC200ACC001 | IC200UAL004 |
IC200UDR005 | IC200UAA003 |
IC200CHS121 | IC200MDL636 |
IC200DTX400 | IC200MDL331 |
IC200UDR003 | IC200CBL002 |
IC200UDR002 | IC200TBX520 |
IC200CPU001 | IC200CBL105 |
IC200UDD164 | IC200BEM103 |
IC200UDR001 | IC200CBL110 |
IC200CMM020 | IC200CBL001 |
IC200PKG102 | IC200TBX440 |
IC200NDD010 | IC200UAR014 |
IC200UDD212 | IC200MDL632 |
IC200PNS002 | IC200MDL329 |
IC200CHS102 | IC200MDL244 |
IC200CHS101 | IC200BEM003 |
IC200UDD220 | IC200MDL635 |
IC200UDR120 | IC200MDL243 |
IC200CPU005 | IC200MDL330 |
IC200UDD240 | IC200ALG432 |
IC200CHS112 | IC200TBX364 |
IC200CHS022 | IC200MDL241 |
IC200PKG104 | IC200TBX464 |
IC200NDR010 | IC200TBX223 |
IC200UDD104 | IC200BEM002 |
IC200NAL110 | IC200ALG630 |
IC200PNS001 | IC200TBX264 |
IC200NAL211 | IC200UDR020 |
IC200NDR001 | IC200BEM104 |
IC200MDL930 | IC200TBX240 |
IC200CHS025 | IC200MDL240 |
IC200CHS005 | IC200TBX540 |
IC200CHS006 | IC200TBX214 |
IC200CHS003 | IC200MDL640 |
IC200CHS111 | IC200ALG431 |
IC200MDL940 | IC200ALG430 |
IC200CPU002 | IC200TBX228 |
IC200UDD112 | IC200TBX420 |
IC200UDD120 | IC200TBX340 |
IC200DEM103 | IC200ALG620 |
IC200UDD064 | IC200ALG325 |
IC200CHS014 | IC200MDL144 |
IC200UDD020 | IC200ALG328 |
IC200NDD101 | IC200TBX320 |
IC200CHS011 | IC200MDL143 |
IC200CHS122 | IC200ALG326 |
IC200MDL743 | IC200MDL141 |
IC200MDL750 | IC200TBX164 |
IC200CBL655 | IC200MDL744 |
IC200CHS001 | IC200TBX140 |
IC200CBL602 | IC200TBX123 |
IC200CHS015 | IC200MDL140 |
IC200CBL635 | IC200MDD849 |
IC200CBL615 | IC200PWR001 |
IC200UAL006 | IC200TBX210 |
IC200MDL742 | IC200MDD850 |
IC200UDD040 | IC200UEX064 |
IC200MDL740 | IC200UEX015 |
IC200CHS002 | IC200MDD848 |
IC200CBL555 | IC200UEX014 |
IC200CBL605 | IC200ALG331 |
IC200UDD110 | IC200ALG266 |
IC200MDL730 | IC200TBX110 |
IC200ACC404 | IC200ALG320 |
IC200ACC403 | IC200TBX028 |
IC200ACC312 | IC200TBX128 |
IC200ETM001 | IC200TBX064 |
IC200UER008 | IC200MDD847 |
IC200TBX020 | IC200MDD845 |
IC200MDD842 | IC200TBX220 |
IC200PWR202 | IC200MDL631 |
IC200ACC313 | IC200MDD851 |
IC200ACC304 | IC200ALG260 |
IC200UEO016 | IC200ALG321 |
IC200TBM001 | IC200UEX012 |
IC200PWR012 | IC200TBX120 |
IC200UER016 | IC200UEX011 |
IC200PWR201 | IC200ALG322 |
IC200MDD846 | IC200TBM005 |
IC200UEI016 | IC200UEX013 |
IC200EBI001 | IC200TBM002 |
IC200UEO108 | IC200ALG264 |
IC200DTX650 | IC200ALG263 |
IC200PWR101 | IC200TBX023 |
IC200ACC303 | IC200ALG327 |
IC200ACC301 | IC200MDD841 |
IC200ERM002 | IC200ALG240 |
IC200ACC200 | IC200MDD843 |
IC200ACC402 | IC200MDD840 |
IC200UEI008 | IC200TBX114 |
IC200PWR011 | IC200ALG261 |
IC200UDR440 | IC200TBX040 |
IC200PWR102 | IC200TBX010 |
IC200DTX850 | IC200ACC415 |
IC200UEC008 | IC200ACC414 |
IC200DTX450 | IC200UEX009 |
IC200UEC208 | IC200CPUE05 |
IC200UEC108 | IC200MDD844 |
IC200ACC451 | IC200ACC405 |
IC200ACC202 | IC200SET001 |
IC200ACC003 | IC200ALG262 |
IC200ACC302 | IC200ALG230 |
IC200UEO008 | IC200UER508 |
IC200ERM001 | IC200UEO116 |
IC200UEM001 | IC200TBX014 |
IC200MDL644 | IC200UEX010 |
IC200CBL505 | IC200KIT001 |
IC200ACC201 | IC200ALG265 |
IC200USB002 | IC200GBI001 |
IC200USB001 | IC200UEX636 |
IC200UMB001 | IC200UEX264 |
IC200UEX736 | IC200UEX214 |
IC200UEX824 | IC200UEX213 |
IC200UMM102 | IC200UEX734 |
IC200UEX826 | IC200UEX222 |
IC200UEX624 | IC200UEX211 |
IC200UEX626 | IC200UUB001 |
IC200UEX215 | IC200UEX212 |
IC200UEX364 | IC200UEX616 |
IC200UMM002 | IC200UEX122 |
IC200UEX209 |
KJ4001X1-DG1 |
KJ4001X1-EA1 |
KJ4001X1-GA1 |
KJ4001X1-GG1 |
KJ4001X1-HA1 |
KJ4001X1-JA1 |
KJ4001X1-NA1 |
KJ4001X1-NB1 |
KJ4002X1-BA1 |
KJ4002X1-BB1 |
KJ4002X1-BC2 |
KJ4002X1-BD2 |
KJ4002X1-BE1 |
KJ4002X1-BF1 |
KJ4002X1-BF2 |
KJ4003X1-BA1 |
KJ4003X1-BB1 |
KJ4003X1-BC1 |
KJ4003X1-BD1 |
KJ4003X1-BE1 |
KJ4003X1-BF1 |
KJ4003X1-BG1 |
KJ4003X1-BH1 |
KJ4010X1-BF1 |
KJ4010X1-BG1 |
KJ4020X1-BD1 |
KJ4110X1-BA1 |
KJ4110X1-BC1 |
KJ6001X1-BA2 |
KJ6001X1-CA2 |
KJ7001X1-BA1 |
KJ7011X1-BA1 |
KJ7012X1-BA1 |
KJ17001X1-BS1 |
KJ7011X1-BA1 |
KJ7102X1-BA1 |
KJ7101X1-BA1 |
VE3003 |
VE3004 |
VE3005 |
VE3006 |
VE3051C0 |
VE3051C1 |
VE3051C2 |
VE3051C3 |
VE3051C4 |
VE3051C5 |
VE3055M1 |
VE3055M2 |
VE4001S2T1 |
VE4001S2T1B1 |
VE4001S2T1B2 |
VE4001S2T1B3 |
VE4001S2T2 |
VE4001S2T2B1 |
VE4001S2T2B2 |
VE4001S2T2B3 |
VE4001S2T2B4 |
VE4001S2T2B5 |
VE4001S3T1B1 |
VE4001S3T1B2 |
VE4001S3T2B1 |
VE4001S3T2B2 |
VE4001S4T1B1 |
VE4001S4T1B2 |
VE4001S4T2B1 |
VE4001S4T2B2 |
VE4002S1T1 |
VE4002S1T1B1 |
VE4002S1T1B2 |
VE4002S1T1B3 |
VE4002S1T2B1 |
VE4002S1T2B2 |
VE4002S1T2B3 |
VE4002S1T2B4 |
VE4002S1T2B5 |