1. Laifi halaye da kuma goyon baya na capacitance na masana'antu iko kewaye hukumar
Da gazawar da capacitance lalacewa ne mafi girma a na'urorin lantarki, musamman a yanayin saukan electrolytic capacitance.
A capacitance gazawar da aka nuna kamar haka: 1.The iya aiki ne kananan; 2. Total asarar damar. 3. A yayyo. 4. A takaice kewaye.
Capacitors wasa a daban-daban rawa a cikin kewaye, da kuma kasawa ma characterized.In masana'antu iko buga kewaye hukumar, Da dijital kewaye hukumar ne masu rinjaye, da capacitor da ake amfani da su yi da ikon tace, da alama hada guda biyu da kuma capacitance na oscillator kewaye ne less.If da electrolytic capacitor amfani a sauya sheka samar da wutar lantarki ta lalace, sharuddan sauyawa wutar lantarki may ba za a fašakarwar, kuma babu wani irin ƙarfin lantarki output.Or fitarwa ƙarfin lantarki tacewa ba shi da kyau, da kewaye saboda irin ƙarfin lantarki rashin zaman lafiya da kuma ma'ana rikice, wasan kwaikwayon na inji aiki sa'o'i ko ba zai iya bude na'ura, idan capacitor da dijital kewaye hukumar samar da wutar lantarki tsakanin tabbatacce kuma korau, wasan kwaikwayon na above.This ne musamman karfi a kusa da kwamfuta motherboard, da yawa kwamfuta amfani bayyana wani lokacin ba zai iya bude inji shekaru da yawa, sabon abu na wani lokacin ya jũya a kan, bude harka, sau da yawa da electrolytic capacitor kidan sabon abu za a iya gani, idan capacitor saukar zuwa mataki damar samun da yawa m fiye da ainihin darajar.
A rayuwa na capacitor ne kai tsaye related to yanayi zazzabi. A mafi girma da muhalli zazzabi, da gajeriyar da capacitor life.This mulki ba kawai ya shafi electrolytic capacitors amma kuma ga sauran capacitors.Therefore, a cikin search for da gazawar capacitance, shi wajibi ne don duba capacitance wanda yake mun gwada kusa da zafi Madogararsa, kamar capacitance ta gefen gidan ruwa, da babban ikon taru aka gyara. A kusa da shi, da mafi kusantar da shi ne za a damaged.Have aka gyara a X-ray aibi injimin gano illa samar da lantarki, masu amfani da gani da hayaki ya fito daga ikon wadata, bude hali bayan isowa a 1000 uF / 350 v manyan capacitor yana da m kaya fita, yaga bude sauko damar kawai 'yan dubun uF, ya gano cewa, kawai capacitance na rectifier gada da zafi nutse kusa, wasu daga yanzu ne m, da iya aiki ne normal.In Bugu da kari, akwai wani gajeren kewaye a capacitance na kasar Sin guntu, kuma shi ma ya gano cewa, da capacitor ne kusa da dumama parts.Therefore, ya kamata a mayar da hankali a lokacin da neman tabbatarwa.
Wasu capacitive yayyo ne ƙwarai da gaske, tare da yatsa touch iya ko da zafi, wannan irin capacitor dole canza.
A cikin hali na kyau da kuma mummuna breakdowns, ya fi kowa laifi ne da gazawar da capacitance damage.So a irin wannan gazawar, capacitance iya zama key duba, bayan da canji na capacitance ne sau da yawa m (ba shakka kuma ya kamata a kula da ingancin na capacitance, zabi mafi brands, kamar yaƙutu, baki lu'u-lu'u da kuma kamar).
2. Halaye da nuna bambanci da juriya lalacewa
Resistors ne mafi yawa da aka gyara a lantarki da kayan aiki, amma ba mafi lalace components.Resistance lalacewa ne ya fi kowa hanyar bude hanya, da kuma juriya ne rare da juriya ne sosai rare.Common carbon film juriya, karfe film juriya, waya rauni juriya da kuma inshora resistance.The mafi yadu kafin iri biyu juriya, da halayyar ta lalacewa ne a low juriya (kasa 100 Ω) da kuma darajar (fiye da 100 k Ω) lalacewar kudi ne mafi girma, matsakaiciyar juriya (kamar 'yan dari zuwa dubban Turai) kadan lalacewa. na biyu shi ne cewa da juriya da low juriya ne sau da yawa sunyi da baki, da kuma shi ne mai sauki gano cewa akwai' yan alamomi a lokacin da juriya high juriya ne damaged.Wire ciwo juriya da aka kullum amfani da matsayin manyan halin yanzu iyaka kwarara, da kuma juriya ba large.Some na cylindrical wayoyi za a iya yin baƙi ko surface ayukan iska mai ƙarfi, fasa ko babu marks.Cement juriya ne da wani irin waya wou nd juriya, wanda zai iya karya a lokacin da kone, in ba haka ba babu wani bayyane trace.When da inshora juriya konewa, wasu saman zai tarwatsa wani yanki na fata, da wasu daga wanda yana da wani alama, amma shi ba zai iya blackened.According zuwa sama halaye, a lokacin da dubawa da juriya, za a iya mayar da hankali a kan, da sauri gane lalace juriya.
Bisa ga halaye na da aka jera a sama, za mu iya fara duba a low juriya dabi'u ga wani alamun yin baƙi a buga kewaye allon , sa'an nan bisa ga lalacewar da Mafiya yawa na bude ko darajar zama ya fi girma, kuma da sauki lalata halaye high juriya dabi'u, za mu iya amfani da multimeter kai tsaye girma sosai high resistances a cikin PCB allon kayan wutan qarishe biyu na da juriya na juriya, idan adadin juriya ne mafi girma daga maras muhimmanci darajar, ne juriya dole ne a lalace (kula to, kamar barga juriya nuna ne kawai bayan ya karshe, saboda iya shunt capacitance a kewaye aka gyara, akwai wani cajin da sallama da tsari), idan adadin juriya ne karami fiye da maras muhimmanci darajar, ku kullum ba su yi watsi da shi. Wannan yadda ka auna kowace resistor a buga kewaye hukumar PCB, ko da idan "ba daidai ba" a dubu, shi ba zai bar daya.
3.the kimantawa Hanyar da aiki amfilifa
Aiki amfilifa na discriminant for quite 'yan lantarki tabbatarwa yana da wani wahala, ba kawai da mataki na al'adu dangantakar fatan shi zai taimake ka ka tattauna wannan tare da ku.
Manufa sarrafawa amfilifa yana da halaye na "rumfa short" da kuma "mai rumfa hutu". Wadannan biyu halaye ne da amfani sosai ga nazarin da kai rangadi na mikakke application.In domin tabbatar da mikakke aikace-aikace, kai dole aiki a karkashin rufaffiyar madauki (korau feedback) .Idan akwai wani korau feedback, da bude madauki karawa ne a comparator.If da na'urar ne da za a yi masa hukunci, ya kamata a sani ko da na'urar da ake amfani da matsayin amfilifa ko matsayin comparator a cikin kewaye.
Ko da abin da irin amfilifa, akwai wani feedback resistor RF, sa'an nan idan mun gyara iya duba bayani juriya a kan hanya daga wutar lantarki, yin amfani da wani multimeter duba fitarwa da kuma juyi na shigar, da juriya tsakanin idan manyan, kamar mafi fiye da 'yan M Ω, sa'an nan za mu iya tabbata da na'urar ne mai yiwuwa aikata mafi for, idan darajar 0 Ω zuwa dama karami k Ω, shi ne don a duba ko da juriya tsakanin fitarwa da kuma juyi na shigar, amfilifa yin amfani da kalmomi za yi.
Bisa ga manufa na rumfa amfilifa takaice, wato a ce, idan aiki amfilifa aiki yadda ya kamata, wannan shigar da baya ƙarfin lantarki na shigar da zai zama daidai, ko da yake akwai bambance-bambance ma mv matakin, ba shakka, a wasu daga cikin high shigar impedance kewaye multimeters juriya zai zama kadan tasiri a kan irin ƙarfin lantarki gwajin, amma kullum ba fiye da 0.2 V, idan bambanci na fiye da 0.5 V, da amfilifa so ba shakka bad!
Idan na'urar da ake amfani da matsayin comparer, shi damar guda ya zama daban-daban daga shigar m da baya shigar da m. A irin ƙarfin lantarki na daya ƙarfin lantarki ne m zuwa>, da kuma fitarwa ƙarfin lantarki ne kusa da iyakar darajar da positive.The guda ƙarfin lantarki ne kuma baya da irin ƙarfin lantarki, da kuma fitarwa ƙarfin lantarki ne kusa da 0V ko korau matsakaicin (dangane da dual ikon ko guda ikon) .Idan da ganewa ƙarfin lantarki ba ya sadu da wannan mulkin, sa'an nan da na'urar za a lalace! Saboda haka ba ka da su yi amfani da canzawa hanyar, ba ka da zuwa ga rushe guntu a kan buga kewaye hukumarto hukunci wasan kwaikwayon na amfilifa.
4. A kananan zamba a gwada SMT gyara a wani multimeter
Wasu faci kashi ne sosai kananan, ta amfani talakawa multimeter alkalama da gwajin tabbatarwa ba sosai dace, shi ne wata ila don sa a takaice kewaye, na biyu shi ne domin mai rufi tare da rufi shafi na fil jirgin damuwa zo a cikin lamba tare da bangaren daga karfe sassa. a nan ne mai sauki hanyar to ba ka da wani yawa na saukaka.
Dauki guda biyu daga cikin mafi ƙarancin adadin needles, masana'antu tabbatarwa fasahar (zurfin) tare da multimeter a kan m, sa'an nan kuma dauki wani karin lafiya da jan waya a waya, tare da tarar jan waya alkalama da allurar da kuma daura da juna, reoccupy solder weld.With irin wannan kananan tip alkalama kuma don auna SMT tattaro aka gyara a lokacin da babu takaice kewaye hukumar, kuma za a iya gano prick rufi shafi, shan key matsayi, ba su da na dame su kankara da membrane membrane.
5. Gyara Hanyar kewaye hukumar jama'a ikon short
Buga kewaye hukumar tabbatarwa, idan kun haɗu da gajarta da'ira Laifi na jama'a da samar da lantarki ne sau da yawa na farko manyan, saboda da yawa na'urorin aka raba wannan da samar da lantarki, kowane na'urar a cikin sharuddan sauyawa samar da lantarki, a can ne tuhuma da gajeren kewaye, idan farantin kashi ne ba yawa, dauko hanyar "fartanya da ƙasa" zai gajarta da'ira batu za a iya samu, idan da yawa SMT aka gyara, iya "fartanya duniya" fartanya to halin da ake ciki zai dogara ne a kan luck.In wannan shawarwarin da mafi tasiri hanyar, yi amfani da wannan hanya, sau biyu da aikin, sau da yawa zai iya sauri sami batu na gazawar.
Don da wani irin ƙarfin lantarki yanzu duk daidaitacce samar da lantarki, irin ƙarfin lantarki 0-30v, yanzu 0-3a, wannan wutar lantarki ita ce ba tsada, 300RMB ko so.Will bude kewaye ƙarfin lantarki da na'urar samar da wutar lantarki irin ƙarfin lantarki matakin, yanzu ga m farko, ƙara irin ƙarfin lantarki a kewaye na da ikon samar da irin ƙarfin lantarki 5 v maki kamar da 74 series kwakwalwan kwamfuta, da kuma 0 v gefe, dangane da mataki na gajeren kewaye, yanzu ƙaruwa sannu a hankali, tare da hannunka touch na'ura, a lokacin da touch zuwa wasu na'urar dumama Babu shakka, wannan ne sau da yawa lalace smd aka gyara, za a iya cire wa da kara tabbatar da measurement.Of Hakika, da irin ƙarfin lantarki dole ba ƙetare aiki irin ƙarfin lantarki na na'ura, da kuma ba za a iya haɗa ta counter, in ba haka ba zai ƙone sauran kyau na'urorin.
6.a kananan magogi, shirya babban matsala
More kuma mafi used a masana'antu iko buga kewaye allon PCB , da yawa hanyoyi na jirgi tare da zinariya yatsa aka saka a cikin Ramin. Saboda daga cikin miyagun masana'antu yanayi, ƙura, zafi, lalatattu gas yanayi samar matalauta lamba gazawar da sauki sa katin, mai yawa abokai iya zama hanyar warware matsalar ta hanyar canza dubawa katin, amma da kudin sayen katin ne sosai babba, musamman na wasu daga cikin shigo da kayan aiki na card.In gaskiya, za ka iya da amfani da wani magogi a goge 'yan sau a kan zinariya yatsa, tsabtace sama da datti a kan zinariya yatsa, sa'an nan a sake gwadawa, watakila shirya matsalar! The hanyar ne mai sauki, kuma m.
7.The bincike na sharri lantarki laifinsu a mai kyau sau
Kowane irin mai kyau sau da kuma mummunan lantarki kasawa iya hada wadannan yanayi:
1. Poor lamba
Bad lamba tare da Ramin, ciki karaya na USB, bad lamba na waya toshe da kuma m, kuma mai rumfa waldi aka gyara, da dai sauransu
2. A siginar da aka gaji da damuwa
Domin dijital haihuwarka, a cikin hali na wasu yanayi, da Laifi ne ba, may gaske ne da yawa tsangwama shafi kula da tsarin sa shi ba daidai ba, kuma suna da wani kewaye hukumar bangaren sigogi ko mutum overall yi sigogi canza, da anti-tsangwama ikon zuwa ga wani tipping batu, haka kasawa.
3. A thermal kwanciyar hankali na gyara ba shi da kyau
Daga mai manyan yawan tabbatarwa ayyuka, da thermal zaman lafiyar na farko electrolytic capacitor ba shi da kyau, ya bi ta hanyar wasu capacitors, triode, diodes, IC, juriya, da dai sauransu.
4. Akwai danshi, da ƙura a kewaye hukumar
danshi da kuma kura za su gudanar da wutar lantarki, tare da juriya sakamako, amma kuma a kan aiwatar da zafi bilges sanyi ji ƙyama juriya zai canja, da sakamako daga juriya tare da sauran abubuwa ne a layi daya, da sakamako ne karfi idan zai iya canja kewaye sigogi, sa maye.
5.Software ne ma wani factor
da yawa sigogi amfani a cikin kewaye domin daidaita software, da izni wasu sigogi a kan ma low, a cikin m range, a lokacin da inji aiki bi da software Laifi dalili, sa'an nan ƙararrawa zai bayyana.
8. Yadda sauri samu gyara bayanai?
Modern lantarki ne multifarious, ƙara fadi da kewayon aka gyara, dubban, a kewaye PCB tabbatarwa, musamman masana'antu buga kewaye hukumar kiyaye yankunan, da yawa daga cikin aka gyara an ba su gani ba, ko ma taba jin, ko da idan wasu sauran gyara na bayanai ne complete, da jirgi a cikin hannunka amma zai karanta data a kwamfuta analysis, idan ba wani mai sauri search hanya, da gyara yadda ya dace da yake faruwa a sayar a wata rangwame ƙwarai, masana'antu lantarki gyara filin, yadda ya dace shi ne kudi, don haka zabi wani kyau PCB ko PCB Majalisar maroki ne da muhimmanci sosai, son bayar da shawarar King-PCB.com a gare ku.