1. makhalidwe vuto ndi kusamalira capacitance wa mafakitale ulamuliro gulu dera
Kulephera kuwonongeka capacitance ndi yayikulu kwambiri zamakono, makamaka pa nkhani ya capacitance electrolytic.
The capacitance kulephera akuonetsedwa ngati motere: 1. mphamvu ndizochepa; 2. Total imfa ya mphamvu; 3. The kutayikira; 4. A dera yochepa.
Capacitors kumathandiza osiyana mu dera, ndipo sanachite bwino amagwiritsidwa characterized.In mafakitale ulamuliro kusindikizidwa dera bolodi, Digito dera bolodi ndi ambiri, ndi capacitor ntchito kuchita mphamvu fyuluta, lumikiza mbendera ndi capacitance a dera la oscillator ndi less.If ndi capacitor electrolytic ntchito kusintha magetsi chawonongeka, mwa kundipatsako kusinthitsa mphamvu mulole osati akututuma, ndipo palibe voteji output.Or linanena bungwe voteji zosefera si zabwino, dera chifukwa voteji kusakhazikika ndi chisokonezo zomveka, ntchito za makina ntchito maola kapena angatsegulenso makina, ngati capacitor ndi dera digito bolodi mphamvu okwanira pakati pa zabwino ndi zoipa, ntchito ya above.This ndi pacimake pafupi mavabodi computer, ambiri kompyuta ntchito limapezeka nthawi zina kutsegula makina kwa zaka zambiri, chodabwitsa zina madzulowo, kutsegula choncho, kawirikawiri amakhala electrolytic capacitor kugunda chodabwitsa Tingaone ngati capacitor pansi kuyeza mphamvu kupeza kwambiri m'munsi kuposa phindu lenileni.
Moyo wa capacitor mwachindunji ndi yozungulira kutentha. The apamwamba kutentha zachilengedwe, wamfupi ndi capacitor life.This kulamulira osati limangokhudza capacitors electrolytic komanso ena capacitors.Therefore, ndi kufunafuna kulephera capacitance, m'pofunika kufufuza capacitance amene ali pafupiko ndi kutentha gwero monga capacitance pambali pa rediyeta ndi mphamvu mkulu anasonkhana zigawo zikuluzikulu. Kwambiri kwa izo, m'pamenenso ndi kuti damaged.Have zitakonzedwa ndi X-ray chilema chowunikira mphamvu okwanira, mapulogalamuwanso kusonyeza utsi anatuluka magetsi, kutsegula choncho titafika pa 1000 uF / 350 g lalikulu capacitor ali ndi zinthu wochuluka kunja, kugwetsera otseguka anabwera pansi ndi mphamvu makumi ochepa uF, anapeza kuti yekha capacitance wa rectifier mlatho ndi kutentha kumira yapafupi, ena kutali ndi bwinobwino, mphamvu ndi normal.In komanso, pali yochepa dera la capacitance la China Chip, komanso wapeza kuti capacitor ndi pafupi ndi Kutentha parts.Therefore, tiyenera kuyang'ana pamene kufunafuna yokonza.
Ena kutayikira capacitive ndi aakulu, ndi kukhudza chala ngakhale otentha, mtundu uwu capacitor ayenera kusintha.
Pankhani ya kuwonongeka zabwino ndi zoipa, vuto ambiri Kulephera kwa capacitance damage.So pa kulephera zimenezi, capacitance kungakhale chinsinsi onani, pambuyo kusintha kwa capacitance zambiri zodabwitsa (kumene ayeneranso kulabadira ubwino wa capacitance ndi kusankha zopangidwa bwino, monga rube, wakuda diamondi ndi zina zotero).
2. Zikhalidwe ndi tsankho kuwononga kulimbikira
Resistors ndi zigawo zambiri kwambiri zamagetsi, koma osati kwambiri kuonongeka components.Resistance kuwonongeka ndi njira ambiri kutsegula msewu, ndi kukana ali osowa ndi kulimbana ndi rare.Common kwambiri mpweya filimu kukana, zitsulo filimu kukana, waya bala kukana ndi inshuwalansi resistance.The ambiri pamaso mitundu iwiri ya kukana, khalidwe kuwonongeka ake ndi kukana otsika (m'munsimu 100 Ω) ndi mtengo wapatali (zoposa 100 K Ω) mlingo kuwonongeka ndi apamwamba, wapakatikati kukana (monga mazana ochepa zikwizikwi European) kuonongeka kochepa; yachiwiri kuti kulimbikira kukana otsika kawirikawiri charred ndi wakuda, ndipo n'zosavuta kupeza kuti pali zizindikiro zochepa pamene kulimbikira kukana yapamwamba damaged.Wire bala kukana amagwiritsidwa ntchito ngati lalikulu panopa malire otaya, ndi kukana si large.Some a mawaya cylindrical akhoza linada kapena pamwamba zikutchinga ming'alu kapena ayi kukana marks.Cement ndi mtundu wa waya wou na- kukana, amene akhoza kuswa pamene yopsereza, mwinamwake palibe kuonekera trace.When inshuwalansi kukana yoyaka, ena pamalo adzakhala aphulitsa chidutswa cha chikopa, ena amene alibe kufufuza, koma sikudzamvekanso blackened.According kuti pamwamba makhalidwe, pamene poona kukana, akhoza kuyang'ana pa, mwamsanga kuti kulimbikira kuonongeka.
Malinga ndi makhalidwe a tatchulazi, tingathe woyamba kuyang'ana pa otsika mfundo kukana kuti zizindikiro zilizonse za linada pa matabwa kusindikizidwa dera , kenako malinga ndi kuwonongeka kwa ambiri mtengo lotseguka kapena kukhala zazikulu ndi zovuta kuwononga makhalidwe amatsogoza zonyamula, tikhoza kugwiritsa ntchito multimeter mwachindunji buku resistances kwambiri mu matabwa pcb dera malekezero onse a kulimbikira kukana, ngati kuchuluka kukaniza ndi wamkulu kuposa mtengo mwadzina, ndi kukana ayenera kuonongeka (kulabadira kuti, monga kukana khola anasonyeza patangopita kuganiza, chifukwa mwina shunt capacitance mu zigawo dera, pali mtengo ndi ndondomeko kumaliseche), ngati kuchuluka kwa kukana n'chochepa kuposa mtengo mwadzina, inu zambiri simusowa kuti zawozo. Umo ndi momwe inu kuyeza iliyonse resistor pa kusindikizidwa dera bolodi pcb, ngakhale "cholakwika" chikwi, izo musalole.
njira 3.the kufufuza mkuzamawu ntchito
Sikuyenda mkuzamawu wa discriminant kwa yokonza ndithu angapo pakompyuta ali vuto linalake, osati digiri ubale chikhalidwe, ndikuyembekeza izo kudzakuthandizani kukambirana nanu.
Yabwino ntchito mkuzamawu ali ndi makhalidwe a "yochepa pafupifupi" ndi "pafupifupi yopuma". makhalidwe awiriwa kwambiri kwa kusanthula ndi zoyendera dera kuti liniya application.In kuonetsetsa ntchito liniya, zoyendera ayenera ntchito pansi chatsekedwa kuzungulira (maganizo oipa) .If palibe maganizo oipa, lotseguka kuzungulira amveke ndi comparator.If ndi chipangizo ndi kuweruzidwa, ayenera kukhala bwinobwino ngati chipangizo ntchito ngati mkuzamawu kapena ngati comparator mu dera la.
Ziribe kanthu chomwe mtundu wa mkuzamawu, pali maganizo resistor RF, ndiye pamene ife kukonza angaletse mayankho kukana panjira kwa magetsi, ntchito multimeter kukayendera linanena bungwe ndi kusintha athandizira, kulimbikira pakati ngati zikuluzikulu monga more kuposa ochepa M Ω, ndiye tingakhale otsimikiza chipangizo mwina kuchita zambiri ngati mtengo 0 Ω kuti ambiri ang'onoang'ono K Ω, ndi kufufuza ngati kulimbikira pakati linanena bungwe ndi kusintha athandizira, mkuzamawu ntchito mawu adzachita.
Malinga ndi mfundo ya mkuzamawu pafupifupi lalifupi, ndiko kunena kuti, ngati mkuzamawu ntchito ntchito bwino, athandizira chomwecho ndi chigamulocho voteji a athandizira adzakhala ofanana, ngakhale pali kusiyana komanso MV msinkhu, ndithudi, ena mkulu athandizira impedance dera multimeters kukana angakuuzeni pang'ono mayeso voteji, koma zambiri osati oposa 0.2 V, ngati kusiyana oposa 0.5 V, ndi mkuzamawu mosakayika zoipa!
Ngati chipangizo ntchito ngati comparer ndi timatha chimodzimodzi kukhala osiyana ndi osachiritsika athandizira ndi n'zosiyana athandizira osachiritsika. The voteji wa voteji chomwecho ndi zosiyana>, ndipo linanena bungwe voteji ali pafupi ndi mtengo pazipita wa positive.The voteji chomwecho ndi n'zosiyana voteji, ndipo linanena bungwe voteji ali pafupi 0V kapena pazipita zoipa (malingana ndi mphamvu wapawiri kapena mphamvu limodzi) .If kudziwika voteji si kukumana lamulo limeneli, ndiye chipangizo imawonongeka Choncho mulibe ntchito njira M'MALO, mulibe kugwetsera pansi Chip pa kusindikizidwa dera bolodikwa woweruza ntchitoyo mkuzamawu lapansi.
4. tsenga yaing'ono kuyesa zigawo SMT mu multimeter ndi
Ena mchitidwe chigamba ndi laling'ono kwambiri, ntchito wamba multimeter zolembera ndi yokonza mayeso si yabwino, zikuoneka kuti chifukwa yochepa dera, wachiwiri ndi lokutidwa ndi kutchinjiriza ❖ kuyanika wa pini gulu anachitazi amakhudzana ndi chigawo chimodzi cha zigawo zitsulo. apa ndi njira yosavuta kukupatsani zambiri mayiko.
Tengani zidutswa ziwiri za mlingo wa singano, mafakitale yokonza luso (akuya) ndi multimeter zolimba, kenako kutenga zambiri zabwino waya mkuwa chingwe, ndi zolembera zabwino mkuwa waya ndi masingano ndi akumangani, reoccupy solder weld.With ochepa zolembera nsonga ndi kuyeza SMT kusonkhana zigawo pamene palibe lalifupi dera bolodi, ndipo akhoza kudziwa pokha kutchinjiriza ❖ kuyanika, kutenga malo ofunikira kwambiri, alibe kundivutitsa kuti scrape nembanemba Kakhungu.
5. kukonza njira ya dera bolodi mphamvu pagulu lalifupi
Kusindikizidwa dera bolodi yokonza, ngati inu kukumana yochepa dera vuto la magetsi anthu ambiri sakhala waukulu woyamba, chifukwa zipangizo zambiri akugawira yomweyo mphamvu okwanira aliyense chipangizo mu kusinthitsa magetsi, pali kukayikitsa dera lalifupi, ngati mbale amafotokozera ndi zambiri amatengera njira ya "kulimira padziko lapansi 'adzakondwera yochepa dera mfundo angapezeke, ngati zambiri smt zigawo," akhoza kulimira dziko lapansi "khasu kuti zinthu kudzadalira luck.In pamawu ichi ndi aluso njira, ntchito njira imeneyi, kawiri pa ntchito, nthawi zambiri mwachangu mpaka kulephera.
Ndi voteji panopa onse chosinthika magetsi, voteji 0-30v, 0-3a panopa, magetsi izi si mtengo, 300RMB kapena so.Will lotseguka dera voteji kwa chipangizo magetsi mlingo voteji, panopa yochepa choyamba, kuwonjezera voteji mu dera la magetsi voteji 5 vesi mfundo monga 74 mndandanda tchipisi, ndipo 0 ndime mbali, malingana ndi mlingo wa dera lalifupi, ukuwonjezeka panopa pang'onopang'ono, ndi chipangizo dzanja kukhudza, pamene kukhudza wina Kutentha chipangizo zigawo mwachionekere, izi kawirikawiri kuonongeka smd, akhoza kuchotsedwa kutsimikiza zina njira measurement.Of, ndi voteji sayenera upambana machitidwe voteji chipangizo, ndipo sangathe olumikizidwa kwa kauntala, mwinamwake izo udzayaka zipangizo zina zabwino.
6.a chofufutira yaing'ono, kuthetsa vuto lalikulu
Koposa ntchito mu mafakitale ulamuliro kusindikizidwa dera matabwa pcb , njira zambiri bolodi ndi chala golide anaikapo mu kagawo lapansi. Chifukwa cha zinthu zoipa mafakitale, fumbi, chinyezi, zikuwononga chilengedwe mpweya umabala osauka kukhudzana kulephera kovuta khadi, ndi anzako kungakhale njira yothetsera mavuto ndi kusintha khadi mawonekedwe, koma mtengo wa kugula khadi n'chachikulu kwambiri, makamaka ena zipangizo kunja kwa card.In Ndipotu, inu mukhoza kugwiritsa ntchito chofufutira misozi kangapo pa chala golide, kuchotsa litsiro pa chala golide, ndiye yeseraninso, mwina kuthetsa vuto! njira yosavuta yothandiza.
7.The kusanthula zolakwa zoipa magetsi mu nthawi yabwino
Mitundu yonse ya nthawi zabwino ndi zoipa zolephera magetsi zingaphatikizepo zinthu zotsatirazi:
1. Osauka kukhudzana
Bad kukhudzana ndi kagawo, mkati wovulala chingwe, kukhudzana zoipa waya pulagi ndi osatha, ndi kuwotcherera pafupifupi zigawo zikuluzikulu, etc.
2. chizindikiro anadabwa
Pakuti madera digito, mu nkhani ya zinthu zina, vuto alipo, mulole kwenikweni kwambiri kusokonezedwa zokhudza ulamuliro dongosolo ndizipange izo molakwika, komanso ndi dera bolodi magawo chigawo kapena munthu magawo ntchito chonse anasintha, ndi odana ndi kuwasokoneza mphamvu kwa monyang'ama mfundo, motero kulephera;
3. Kukhazikitsidwa matenthedwe zigawo zikuluzikulu si zabwino
Kuchokera ambiri miyambo kukonza mtendere matenthedwe wa woyamba electrolytic capacitor si zabwino, kenako capacitors zina, triode, diodes, IC, kukana, etc.
4. Pali chinyezi ndi fumbi pa bolodi dera
chinyezi ndi fumbi azichititsa magetsi, ndi kukana zotsatira, komanso mu ndondomeko ya bilges kutentha ozizira kuotcha kukana nawonso kusintha, zotsatira za kukana pamodzi ndi zinthu zinanso mu kufanana, kwenikweni ndi mphamvu pamene angathe kusintha magawo dera, kupanga kulephera;
5.Software chinthu chinanso
magawo ambiri mu dera kusintha mapulogalamu, gawo la ena magawo pa otsika kwambiri, mu osiyanasiyana ovuta, pamene makina ntchito kutsatira chifukwa pulogalamu vuto, ndiye Alamu adzaoneka.
8. Kodi mwachangu zigawo zikuluzikulu zambiri?
Zamagetsi zamakono ndi multifarious, osiyanasiyana kunadetsa lonse zigawo zikuluzikulu, zikwi, ntchito yokonza dera pcb, makamaka mafakitale kusindikizidwa dera bolodi m'madera kukonza ambiri a zigawo zikuluzikulu samaoneka, kapena ngakhale asadamvepo za, ngakhale ena zigawo zina zili wathunthu, bolodi mu dzanja koma kuwerenga deta mu kusanthula kompyuta, ngati si mofulumira kufufuza njira, dzuwa yokonza ati kugulitsa pa kuchotsera kwambiri, mafakitale zamakono munda kukonza, dzuwa ndi ndalama, kotero kusankha PCB zabwino kapena PCB Assembly katundu Nkofunika angakonde amalangiza King-PCB.com kwa inu.