Takulandilani ku kalozera wathu wathunthu woyendera ma board osindikizidwa (PCBs) ndi ma multimeter.Kaya ndinu wokonda kuchita zinthu zinazake, wokonda zamagetsi, kapena katswiri, kudziwa kugwiritsa ntchito moyenera ma multimeter kuyesa ma PCB ndikofunikira kwambiri pakuthana ndi mavuto ndikuwonetsetsa kudalirika kwa ntchito zanu zamagetsi.Mubulogu iyi, tifotokoza mwatsatanetsatane ndondomeko yatsatanetsatane ya PCB yowunikira mozama pogwiritsa ntchito makina ochulukitsira, kukupatsani chidziwitso chowunikira cholakwika ndikukonza koyenera.
Phunzirani za PCB ndi zigawo zake:
Musanayambe kudumphira mu ndondomekoyi, ndikofunikira kuti mukhale ndi chidziwitso cha PCB ndi zigawo zake.PCB ndi pepala lathyathyathya la zinthu zopanda conductive (nthawi zambiri fiberglass) yomwe imapereka chithandizo chamakina ndi kulumikizana kwamagetsi pazinthu zosiyanasiyana zamagetsi.Zigawo izi, monga resistors, capacitors, diode, ndi mabwalo ophatikizika, amayikidwa pa PCB pogwiritsa ntchito njira zoyendetsera zotchedwa traces.
Khwerero 1: Onetsetsani kuti multimeter yakhazikitsidwa bwino:
Kuti muyambe kuyang'ana kwa PCB, ikani multimeter ku zoikamo zoyenera.Sinthani ku "Ohms" kapena "Resistance" mode, chifukwa izi zidzatithandiza kuyeza kupitiriza ndi kukana pa bolodi.Komanso, sinthani masinthidwe osiyanasiyana malinga ndi zomwe mukuyembekezera kukana zomwe mungakumane nazo pa PCB.
Gawo 2: Onani Kupitilira:
Kuyesa kopitilira kumathandizira kuzindikira kukhulupirika kwa ma trace ndi ma solder pa PCB.Choyamba zimitsani mphamvu PCB.Kenako, gwirani ma probe akuda ndi ofiira a multimeter kumalo awiri osiyana pa trace kapena solder joint.Ngati multimeter ikulira kapena ikuwonetsa kukana kwa ziro, zikuwonetsa kupitiliza, kuwonetsa kutsata bwino kapena kulumikizana.Ngati palibe beep kapena kukana kwambiri kuwerenga, pali dera lotseguka kapena kulumikizana koyipa komwe kumayenera kukonzedwa.
Gawo 3: Dziwani dera lalifupi:
Mabwalo amfupi nthawi zambiri amakhala omwe amachititsa kuti PCB iwonongeke.Kuti muwazindikire, ikani ma multimeter anu kukhala "diode".Gwirani kafukufuku wakuda pansi, kenako gwirani pang'onopang'ono kafukufuku wofiyira kumalo osiyanasiyana pa PCB, makamaka pafupi ndi ma IC ndi zida zotulutsa kutentha.Ngati ma multimeter awerengera otsika kapena ma beep, amawonetsa dera lalifupi lomwe limafuna kuyang'anitsitsa ndikukonzanso.
Khwerero 4: Yezerani Kukanika:
Kuyesa kukana kumathandizira kudziwa kukhulupirika kwa otsutsa pa PCB.Sankhani mulingo woyenera pa ma multimeter kuti muyezetse kukana ndikukhudza nsonga ya probe mpaka malekezero onse a resistor.Wotsutsa wathanzi ayenera kupereka kukana mkati mwa kulolera komwe kumasonyezedwa ndi mtundu wake.Ngati zowerengera zazimitsidwa kwambiri, chopingacho chingafunikire kusinthidwa.
Khwerero 5: Ma Capacitor Oyesa:
Ma capacitors ndi zinthu zofunika kwambiri zomwe nthawi zambiri zimakhala zolephera.Kuti muwonetsetse kugwira ntchito kwake, ikani multimeter ku "capacitance" mode.Dziwani ma terminals abwino ndi oyipa a capacitor ndikuyika ma probe a multimeter moyenerera.Multimeter idzawonetsa mtengo wa capacitance, womwe mungafanane ndi mphamvu yodziwika pa chigawocho.Makhalidwe osiyanasiyana amatha kuwonetsa capacitor yolakwika.
Potsatira njira zomwe zili pamwambazi, mutha kugwiritsa ntchito ma multimeter kuti muwone ndikuzindikira zovuta pa PCB.Kumbukirani kuti kuleza mtima ndi kuyang'ana ndizofunikira panthawiyi kuti muwonetsetse zotsatira zolondola ndikupewa kuwonongeka kwina.Pozindikira zolakwika, mutha kuyamba kukonza molimba mtima, kutsogolera mapulojekiti opambana amagetsi ndikuwongolera luso lanu lothana ndi mavuto.Kuyesa kosangalatsa ndi kukonza!
Nthawi yotumiza: Jul-31-2023