Tikugashirei kune yedu yakazara gwara rekuongorora akadhindwa edunhu mabhodhi (PCBs) ane multimeter.Kunyangwe iwe uri hobbyist, anofarira zvemagetsi, kana nyanzvi, kuziva mashandisiro ekushandisa multimeter kuyedza maPCB kwakakosha pakugadzirisa matambudziko uye kuona kuvimbika kwemapurojekiti ako emagetsi.Mune ino blog, isu tinotsanangudza nhanho-ne-nhanho maitiro ekunyatsoongorora PCB tichishandisa multimeter, tichikupa iwe ruzivo rwekuona chikanganiso uye kugadzirisa kunodiwa.
Dzidza nezvePCB uye zvikamu zvadzo:
Usati wanyura mukuita, zvakakosha kuve nekunzwisisa kwekutanga kwePCB uye zvikamu zvayo.A PCB ipepa rakati sandara rezvisiri-conductive zvinhu (kazhinji fiberglass) inopa tsigiro yemakanika uye yekubatanidza magetsi kune akasiyana emagetsi zvikamu.Izvi zvikamu, zvakadai sezvidziviriro, capacitors, diodes, uye masekete akasanganiswa, akaiswa paPCB achishandisa nzira dzinofambisa dzinonzi traces.
Danho 1: Ita shuwa kuti multimeter yakamiswa nenzira kwayo:
Kutanga PCB kuongorora, isa iyo multimeter kune yakakodzera marongero.Chinja ku "Ohms" kana "Resistance" maitiro, sezvo izvi zvichatibvumira kuyera kuenderera uye kuramba pabhodhi.Zvakare, gadzirisa marongero anoenderana neanotarisirwa kuramba maitiro auchasangana nawo paPCB.
Danho 2: Tarisa Kuenderera mberi:
Kuenderera mberi kwekuyedza kunobatsira kuona kutendeseka kwemateki uye majoini ekutengesa paPCB.Kutanga kudzima simba kuPCB.Tevere, bata multimeter dema uye dzvuku probes kune maviri akasiyana mapoinzi pane trace kana solder joint.Kana iyo multimeter ichirira kana kuratidza zero kuramba, inoratidza kuenderera, zvichiratidza kurongeka kwakanaka kana kubatana.Kana pasina beep kana kupikisa kwepamusoro kuverenga, kune dunhu rakavhurika kana kubatanidza kwakashata kunoda kugadziriswa.
Danho rechitatu: Ziva dunhu pfupi:
Maseketi mapfupi kazhinji ndiwo anokonzera kukanganisa kwePCB.Kuti uvazive, isa multimeter yako ku "diode" mode.Bata iyo nhema probe pasi, wobva wabata zvishoma dzvuku probe kune akasiyana mapoinzi paPCB, kunyanya padhuze neIC uye zvinhu zvinogadzira kupisa.Kana iyo multimeter ichiverenga yakaderera kana beep, inoratidza pfupi dunhu rinoda kumwe kuongorora nekugadzirisa.
Nhanho 4: Mera Resistance:
Resistance test inobatsira kuona kuvimbika kwevanopikisa paPCB.Sarudza iyo yakakodzera renji pane iyo multimeter yekuyerwa kuyerwa uye ubate iyo probe tipi kune ese ari maviri epikisi.Mushonga une hutano unofanirwa kupa kushorwa mukati mekushivirira kunoratidzwa nekodhi yemavara ayo.Kana kuverenga kwakadzimwa zvakanyanya, chinopikisa chingada kutsiviwa.
Nhanho 5: Test Capacitors:
Capacitors zvinhu zvakakosha izvo zvinowanzoita kukundikana.Kuti ive nechokwadi chekushanda kwayo, isa iyo multimeter ku "capacitance" mode.Ziva iyo yakanaka uye yakaipa terminals ye capacitor uye isa iyo multimeter probes zvinoenderana.Iyo multimeter icharatidza iyo capacitance kukosha, iyo iwe yaunogona kuenzanisa neiyo capacitance yakanyorwa pane chikamu.Hunhu hwakasiyana hwakakosha hunogona kuratidza yakashata capacitor.
Nekutevera matanho ari pamusoro apa, unogona kunyatsoshandisa multimeter kutarisa uye kuongorora matambudziko paPCB.Rangarira kuti moyo murefu uye kutarisisa kwakakosha panguva iyi kuita kuti uve nechokwadi chemhedzisiro uye kudzivirira imwe kukuvara.Nekunyatso ziva zvikanganiso, unogona kutanga kugadzirisa uine chivimbo, kufambisa mapurojekiti emagetsi akabudirira uye nekuvandudza hunyanzvi hwako hwekugadzirisa matambudziko.Kufara kuedza nekugadzirisa!
Nguva yekutumira: Jul-31-2023