Zoo siab txais tos rau peb cov lus qhia dav dav rau kev tshuaj xyuas cov ntawv luam tawm Circuit boards (PCBs) nrog lub ntsuas ntsuas.Txawm hais tias koj yog tus nyiam nyiam, nyiam siv hluav taws xob, lossis cov kws tshaj lij, kev paub txog kev siv lub tshuab hluav taws xob kom zoo los ntsuas PCBs yog qhov tseem ceeb rau kev daws teeb meem thiab ua kom muaj kev ntseeg siab ntawm koj cov khoom siv hluav taws xob.Hauv qhov blog no, peb yuav piav qhia txog cov txheej txheem ib ntus rau kev kuaj xyuas PCB kom zoo siv lub tshuab multimeter, muab kev paub rau koj los txheeb xyuas qhov txhaum thiab kho qhov tsim nyog.
Kawm txog PCBs thiab lawv cov khoom:
Ua ntej dhia mus rau hauv cov txheej txheem, nws yog ib qho tseem ceeb kom muaj kev nkag siab yooj yim ntawm PCB thiab nws cov khoom.PCB yog ib daim ntawv tiaj tus ntawm cov khoom siv tsis zoo (feem ntau fiberglass) uas muab kev txhawb nqa thiab kev sib txuas hluav taws xob rau ntau yam khoom siv hluav taws xob.Cov khoom no, xws li cov resistors, capacitors, diodes, thiab kev sib xyaw ua ke, tau teeb tsa rau ntawm PCB siv txoj hauv kev hu ua kab.
Kauj ruam 1: Xyuas kom tseeb tias lub multimeter yog teem kom raug:
Txhawm rau pib kev tshuaj xyuas PCB, teeb lub multimeter mus rau qhov tsim nyog.Hloov nws mus rau "Ohms" lossis "Resistance" hom, vim qhov no yuav tso cai rau peb ntsuas qhov txuas ntxiv thiab tsis kam ntawm lub rooj tsavxwm.Tsis tas li ntawd, kho qhov chaw teeb tsa raws li qhov yuav tsum tau ua kom muaj nuj nqis koj yuav ntsib ntawm PCB.
Kauj ruam 2: Tshawb xyuas txuas ntxiv:
Kev ntsuas txuas ntxiv pab txheeb xyuas qhov kev ncaj ncees ntawm cov kab thiab cov pob qij txha ntawm PCB.Ua ntej tua lub hwj chim rau PCB.Tom ntej no, kov lub multimeter's dub thiab liab sojntsuam mus rau ob lub ntsiab lus sib txawv ntawm cov kab los yog kev sib koom ua ke.Yog hais tias lub multimeter beeps los yog qhia xoom tsis kam, nws qhia tau hais tias txuas mus ntxiv, qhia ib txoj kab zoo los yog kev sib txuas.Yog tias tsis muaj lub suab nrov lossis kev nyeem ntawv siab, muaj qhov qhib Circuit Court lossis kev sib txuas tsis zoo uas yuav tsum tau kho.
Kauj Ruam 3: Txheeb xyuas qhov luv luv:
Cov luv luv Circuit Court feem ntau yog qhov ua txhaum ntawm PCB tsis ua haujlwm.Txhawm rau txheeb xyuas lawv, teeb tsa koj lub multimeter rau "diode" hom.Kov qhov kev sojntsuam dub rau hauv av, tom qab ntawd maj mam kov lub xov tooj liab mus rau ntau lub ntsiab lus ntawm PCB, tshwj xeeb tshaj yog nyob ze ICs thiab cov khoom tsim hluav taws xob.Yog hais tias lub multimeter nyeem qis los yog beeps, nws qhia tau hais tias luv luv Circuit Court uas yuav tsum tau soj ntsuam thiab kho ntxiv.
Kauj Ruam 4: Ntsuas qhov tsis kam:
Kev ntsuas kev tiv thaiv pab txiav txim siab kev ncaj ncees ntawm cov resistors ntawm PCB.Xaiv qhov tsim nyog ntau yam ntawm lub multimeter rau qhov ntsuas kev tiv thaiv thiab kov cov lus sojntsuam rau ob qho kawg ntawm qhov resistor.Ib tug noj qab nyob zoo resistor yuav tsum muab kev tiv thaiv nyob rau hauv lub kam rau ua qhia los ntawm nws cov xim code.Yog tias qhov kev nyeem ntawv raug kaw lawm, lub resistor yuav tsum tau hloov.
Kauj Ruam 5: Test Capacitor:
Capacitors yog cov khoom tseem ceeb uas feem ntau ua rau tsis ua haujlwm.Txhawm rau kom nws ua haujlwm tau zoo, teeb lub multimeter rau "capacitance" hom.Txheeb xyuas qhov zoo thiab qhov tsis zoo ntawm lub capacitor thiab tso cov kev sojntsuam multimeter raws li.Lub multimeter yuav tso saib tus nqi capacitance, uas koj tuaj yeem muab piv rau lub capacitance cim ntawm cov khoom.Qhov sib txawv ntawm qhov tseem ceeb yuav qhia tau tias lub capacitor faulty.
Los ntawm ua raws li cov kauj ruam saum toj no, koj tuaj yeem siv ntau lub ntsuas ntsuas los kuaj xyuas thiab kuaj cov teeb meem ntawm PCB.Nco ntsoov tias kev ua siab ntev thiab ua kom pom tseeb yog qhov tseem ceeb thaum lub sijhawm txheej txheem no kom ntseeg tau tias cov txiaj ntsig raug thiab zam kev puas tsuaj ntxiv.Los ntawm kev txheeb xyuas qhov tsis raug, koj tuaj yeem pib kho nrog kev ntseeg siab, ua kom yooj yim rau kev ua tiav cov khoom siv hluav taws xob thiab txhim kho koj cov kev txawj daws teeb meem.Zoo siab kuaj thiab kho!
Post lub sij hawm: Lub Xya hli ntuj-31-2023