Ib 、 Lub capacitance ntawm LED zaub Circuit Court board puas lawm
Qhov tsis ua hauj lwm los ntawm kev puas tsuaj capacitor yog qhov siab tshaj plaws hauv cov khoom siv hluav taws xob, tshwj xeeb tshaj yog kev puas tsuaj ntawm electrolytic capacitor.Capacitor puas yog manifested li: 1. txo peev xwm;2. Tsis muaj peev xwm ua tiav;3. Cov dej ntws;4. luv Circuit Court.
ﺌ 、 Resistance puas
Nws yog ib qho uas pom ntau tus neeg pib ua haujlwm nrog cov resistors thaum kho lub rooj tsav xwm Circuit Court, xws li dismantling lossis soldering.Qhov tseeb, nrog kev kho ntau dua, tsuav koj nkag siab txog qhov kev puas tsuaj ntawm cov resistors, koj tsis tas yuav txhawj xeeb ntau dhau.Kev ua haujlwm tsis zoo yog qhov feem ntau ntawm cov khoom siv hluav taws xob, tab sis nws tsis yog cov khoom uas muaj kev puas tsuaj ntau tshaj plaws.Resistance puas yog feem ntau nyob rau hauv qhib circuits, nrog rau cov kev tiv thaiv qhov tseem ceeb yog tsis tshua muaj thiab txo nqi kuj tsis tshua muaj.Cov hom muaj xws li carbon film resistors, hlau zaj duab xis resistors, hlau qhov txhab resistors, thiab fuse resistors.Peb tuaj yeem soj ntsuam thawj zaug yog tias muaj cov cim ntawm kev kub hnyiab dub ntawm qhov tsis kam tiv thaiv ntawm lub rooj tsav xwm Circuit Court.Raws li cov yam ntxwv ntawm feem ntau qhib circuits los yog muaj zog tiv thaiv thaum lub sij hawm ua hauj lwm puas, raws li zoo raws li lub siab nyiam ntawm high-resistance yuav yooj yim puas, peb yuav siv tau ib tug multimeter ncaj qha ntsuas qhov tseem ceeb tsis kam ntawm ob qho tag nrho ntawm lub siab kuj ntawm lub Circuit Court board.Yog tias qhov ntsuas ntsuas tus nqi siab dua tus nqi nominal tsis kam, Yog tias qhov kev tiv thaiv tau raug puas tsuaj (nws yuav tsum tau sau tseg kom tos kom txog thaum tus nqi tiv thaiv qhia tau tias muaj kev ruaj ntseg ua ntej txiav txim siab, vim tias tej zaum yuav muaj kev them nqi thiab kev tawm mus rau tib lub sijhawm nrog capacitor. Cheebtsam nyob rau hauv Circuit Court), yog hais tias tus nqi kuj ntsuas yog me dua lub nominal kuj nqi, nws yog feem ntau ignored.Nyob rau hauv txoj kev no, txhua tus resistor ntawm lub rooj tsav xwm Circuit Court yog ntsuas ib zaug, thiab txawm tias koj yuam kev tua ib txhiab, koj yuav tsis nco ib qho resistor.
三 、 Ib txoj hauv kev los txiav txim qhov zoo ntawm kev ua haujlwm Amplifiers
Amplifiers muaj cov yam ntxwv ntawm "virtual luv" thiab "virtual so", uas yog qhov muaj txiaj ntsig zoo rau kev txheeb xyuas cov kab hluav taws xob ua haujlwm ua haujlwm amplifier circuits.Txhawm rau kom ntseeg tau tias daim ntawv thov linear, lub tshuab ua haujlwm ua haujlwm yuav tsum ua haujlwm hauv lub voj kaw (cov lus tsis zoo).Yog tias tsis muaj kev tawm tswv yim tsis zoo, lub tshuab ua haujlwm ua haujlwm nyob rau hauv qhib-loop amplification dhau los ua tus sib piv.Yog tias koj xav txiav txim siab txog qhov zoo ntawm lub cuab yeej, koj yuav tsum xub paub qhov txawv ntawm cov cuab yeej siv los ua ib qho amplifier lossis ib qho kev sib piv hauv Circuit Court.Raws li lub hauv paus ntsiab lus ntawm amplifier virtual luv luv, uas yog hais tias, yog hais tias lub lag luam amplifier ua haujlwm zoo, qhov voltage ntawm tib lub tswv yim thiab rov qab input terminals yuav tsum sib npaug, txawm tias muaj qhov sib txawv, nws tseem nyob rau theem ntawm mv. .Ntawm chav kawm, nyob rau hauv ib co input impedance circuits, lub internal kuj ntawm lub multimeter tej zaum yuav muaj kev cuam tshuam me ntsis ntawm qhov ntsuas voltage, tab sis nws feem ntau tsis tshaj 0.2V.Yog tias muaj qhov sib txawv ntawm 0.5V lossis ntau dua, lub amplifier yuav ua tsis tau!Yog tias lub cuab yeej siv los ua qhov sib piv, nws raug tso cai kom muaj cov khoom siv tsis sib xws hauv tib qho kev taw qhia thiab rov qab cov lus qhia.Yog tias tib qhov hluav taws xob ntau dua qhov hluav taws xob rov qab, qhov tso zis hluav taws xob yog ze rau qhov zoo tshaj plaws tus nqi;Yog tib qhov voltage
四 、 Lub Tswv Yim rau kev sim SMT Cheebtsam nrog multimeter
Qee qhov SMD Cheebtsam yog me me, ua rau nws tsis yooj yim rau kev siv cov khoom siv multimeter zoo tib yam rau kev kuaj thiab kho.Ua ntej, lawv tuaj yeem yooj yim ua rau luv luv, thiab qhov thib ob, nws tsis yooj yim rau Circuit Court boards coated nrog rwb thaiv tsev kom nkag mus rau hauv kev sib cuag nrog cov hlau ntawm cov khoom siv pins.Ntawm no yog ib txoj hauv kev yooj yim uas yuav coj tau ntau yam yooj yim rau kev sim.Siv ob lub tshuab xaws me tshaj plaws, (Kev Tswj Kev Tswj Kev Siv Tshuab Sib Nqus) thiab muab lawv nruj nreem tiv thaiv tus cwj mem multimeter.Tom qab ntawd, muab ib lub xov tooj nyias nyias los ntawm ntau txoj hlua khi, khi tus cwj mem thiab rab koob xaws ua ke nrog cov hlau zoo, thiab khi lawv kom ruaj khov.Txoj kev no, thaum ntsuas SMT cov khoom nrog lub stylus nrog ib rab koob me me, tsis muaj kev pheej hmoo ntawm luv luv Circuit Court, thiab rab koob tuaj yeem puncture lub rwb thaiv tsev txheej thiab ncaj qha ntaus qhov tseem ceeb, tshem tawm qhov yuav tsum tau thab scraping zaj duab xis.
五、Maintenance Method for Short Circuit Fault of Circuit Board Common Power Supply
Nyob rau hauv Circuit Court board tu, yog hais tias muaj ib tug luv luv Circuit Court rau ib tug ntaufais fab mov, feem ntau yog qhov ua txhaum loj tshaj plaws, vim tias ntau yam khoom siv sib koom ua ke tib lub zog, thiab txhua yam khoom siv hluav taws xob siv hluav taws xob no xav tias muaj kev cuam tshuam luv luv.Yog tias tsis muaj ntau yam ntawm lub rooj tsavxwm, siv txoj kev "hoe lub ntiaj teb" tuaj yeem pom qhov luv luv luv.Yog tias muaj ntau yam khoom, txawm tias "lub ntiaj teb" hoe qhov xwm txheej nyob ntawm txoj hmoo.Ntawm no yog ib txoj kev pom zoo uas ua haujlwm zoo.Los ntawm kev siv txoj kev no, koj tuaj yeem tau txais ob zaug qhov tshwm sim nrog ib nrab ntawm kev siv zog thiab feem ntau sai nrhiav qhov txhaum.Yuav tsum muaj cov khoom siv hluav taws xob uas hloov tau qhov voltage thiab tam sim no, nrog rau qhov hluav taws xob ntawm 0-30V thiab tam sim no ntawm 0-3A.Lub hwj chim mov no tsis kim thiab raug nqi ib ncig 300 yuan.Kho qhov qhib Circuit Court voltage mus rau theem ntawm lub cuab yeejfais fab movhluav taws xob.Ua ntej, kho qhov tam sim no mus rau qhov tsawg kawg nkaus.Siv qhov hluav taws xob no rau lub zog hluav taws xob cov ntsiab lus ntawm lub voj voog, xws li 5V thiab 0V terminals ntawm 74 series nti.Nyob ntawm qhov degree ntawm qhov luv luv, maj mam nce qhov tam sim no.Kov lub cuab yeej nrog koj txhais tes.Thaum ib qho cuab yeej ua kom sov heev, nws feem ntau yog cov khoom puas.Koj tuaj yeem tshem nws mus rau kev ntsuas ntxiv thiab kev pom zoo.Tau kawg, qhov hluav taws xob thaum lub sijhawm ua haujlwm yuav tsum tsis pub tshaj qhov ua haujlwm ntawm lub cuab yeej, thiab nws yuav tsum tsis txhob thim rov qab, txwv tsis pub nws yuav hlawv tawm lwm yam khoom siv zoo.
六 、 Cov roj hmab me me los daws cov teeb meem loj
Tus naj npawb ntawm cov laug cam siv hauv kev tswj kev lag luam yog nce, thiab ntau lub rooj tsavxwm siv cov txheej txheem ntawm kev ntxig cov ntiv tes kub rau hauv cov qhov.Vim muaj kev lag luam hnyav, uas yog plua plav, av noo, thiab corrosive, nws yooj yim rau cov laug cam kom muaj kev sib cuag tsis zoo.Ntau tus phooj ywg yuav daws tau qhov teeb meem los ntawm kev hloov cov laug cam, tab sis tus nqi ntawm kev yuav cov laug cam yog qhov tseem ceeb heev, tshwj xeeb tshaj yog rau qee cov khoom siv hauv tsev.Qhov tseeb, txhua leej txhua tus tuaj yeem siv cov lwv rov qab los so cov av ntawm tus ntiv tes golden ob peb zaug, ntxuav nws, thiab tom qab ntawd sim lub tshuab dua.Tej zaum qhov teeb meem yuav daws tau!Txoj kev yog yooj yim thiab siv tau.
七 、 Kev tshuaj xyuas ntawm hluav taws xob tsis raug nrog lub sijhawm zoo thiab tsis zoo
Hais txog qhov tshwm sim, ntau yam hluav taws xob tsis zoo nrog lub sijhawm zoo thiab tsis zoo yuav suav nrog cov xwm txheej hauv qab no:
1. Kev sib cuag tsis zoo ntawm lub rooj tsavxwm thiab qhov, tsis tuaj yeem txuas thaum lub cable tawg sab hauv, kev sib cuag tsis zoo ntawm cov hlau ntsaws thiab lub davhlau ya nyob twg, thiab cov khoom tsis zoo ntawm cov khoom siv tag nrho yog nyob rau hauv pawg no;
2. Rau digital circuits, malfunctions tsuas yog tshwm sim nyob rau hauv tej yam kev mob vim muaj teeb meem cuam tshuam.Nws yog qhov ua tau tias kev cuam tshuam ntau dhau tau cuam tshuam rau kev tswj hwm thiab ua rau nws ua yuam kev, thiab kuj tseem muaj kev hloov pauv ntawm cov khoom siv ntawm tus kheej lossis kev ua haujlwm tag nrho ntawm lub rooj tsavxwm Circuit Court, ua rau lub ntsiab lus tseem ceeb hauv kev tiv thaiv kev cuam tshuam thiab ua rau muaj kev cuam tshuam loj heev. ua haujlwm tsis zoo;
3. Tsis zoo thermal stability ntawm Cheebtsam Los ntawm ib tug loj tus naj npawb ntawm kev saib xyuas, thermal stability ntawm thawj electrolytic capacitor yog tsis zoo, ua raws li los ntawm lwm yam capacitors, triodes, diodes, ICs, resistors, thiab lwm yam;
4. Muaj cov dej noo, plua plav, thiab lwm yam ntawm lub rooj tsavxwm.Cov dej noo thiab plua plav yuav ua hluav taws xob nrog cov nyhuv tiv thaiv, thiab tus nqi tiv thaiv yuav hloov thaum thermal expansion.Tus nqi tiv thaiv no muaj qhov sib npaug nrog lwm cov khoom.Yog tias qhov kev cuam tshuam no muaj zog, qhov ntsuas hluav taws xob yuav raug hloov, ua rau muaj qhov tsis zoo;
5. Software kuj yog ib qho tseem ceeb rau kev xav.Ntau qhov tsis sib xws hauv Circuit Court raug kho siv software, thiab cov npoo ntawm qee qhov kev ntsuas tau teeb tsa qis dhau, uas yog nyob rau hauv qhov tseem ceeb.Thaum lub tshuab ua haujlwm ua tau raws li qhov laj thawj rau lub software los txiav txim qhov txhaum, lub tswb yuav tshwm sim.
Post lub sij hawm: Jun-21-2023
