Siyakwamukela kumhlahlandlela wethu ophelele wokuhlola amabhodi esekethe aphrintiwe (ama-PCB) nge-multimeter.Noma ngabe ungumuntu othanda ukuzilibazisa, othanda izinto zikagesi, noma uchwepheshe, ukwazi ukuthi ungasebenzisa kanjani i-multimeter ngempumelelo ukuhlola ama-PCB kubalulekile ekuxazululeni izinkinga kanye nokuqinisekisa ukwethembeka kwamaphrojekthi akho kagesi.Kule bhulogi, sizochaza inqubo yesinyathelo nesinyathelo yokuhlola okuphelele kwe-PCB kusetshenziswa i-multimeter, sikunikeze ulwazi lokukhomba iphutha futhi wenze ukulungisa okudingekayo.
Funda ngama-PCB nezingxenye zawo:
Ngaphambi kokungena kwinqubo, kubalulekile ukuba nokuqonda okuyisisekelo kwe-PCB nezingxenye zayo.I-PCB iyishidi eliyisicaba lezinto ezingasebenzisi (imvamisa i-fiberglass) elihlinzeka ngosekelo lwemishini kanye noxhumo lukagesi lwezingxenye ezihlukahlukene ze-elekthronikhi.Lezi zingxenye, ezinjengama-resistors, ama-capacitor, ama-diode, namasekhethi ahlanganisiwe, afakwe ku-PCB kusetshenziswa izindlela eziqhutshwayo ezibizwa ngokuthi ama-traces.
Isinyathelo 1: Qiniseka ukuthi i-multimeter isethwe ngendlela efanele:
Ukuze uqale ukuhlolwa kwe-PCB, setha i-multimeter kuzilungiselelo ezifanele.Ishintshele kumodi ethi "Ohms" noma "Resistance", njengoba lokhu kuzosivumela ukuthi silinganise ukuqhubeka nokumelana ebhodini.Futhi, lungisa ukulungiselelwa kobubanzi ngokuvumelana namanani okumelana okulindelekile ozohlangana nawo ku-PCB.
Isinyathelo sesi-2: Hlola Ukuqhubeka:
Ukuhlola ukuqhubeka kusiza ukukhomba ubuqotho bemikhondo namajoyinti e-solder ku-PCB.Qala ngokuvala amandla ku-PCB.Okulandelayo, thinta ama-multimeters amnyama nokubomvu kumaphoyinti amabili ahlukene ku-trace noma ekuhlanganyeleni kwe-solder.Uma i-multimeter ikhala noma ibonisa ukumelana ne-zero, ibonisa ukuqhubeka, okubonisa ukulandelana okuhle noma uxhumano.Uma kungekho bhiphu noma ukufundwa kokumelana okuphezulu, kukhona isifunda esivulekile noma uxhumano olubi oludinga ukulungiswa.
Isinyathelo sesi-3: Khomba isifunda esifushane:
Amasekhethi amafushane ngokuvamile ayimbangela yokwehluleka kwe-PCB.Ukuze uzibone, setha i-multimeter yakho kumodi ye-"diode".Thinta i-probe emnyama phansi, bese uthinta kancane i-probe ebomvu ezindaweni ezihlukahlukene ku-PCB, ikakhulukazi eduze nama-IC kanye nezinto ezikhiqiza ukushisa.Uma i-multimeter ifundeka phansi noma i-beep, ikhombisa isifunda esifushane esidinga ukuhlolwa nokulungiswa okwengeziwe.
Isinyathelo sesi-4: Linganisa Ukumelana:
Ukuhlolwa kokumelana kusiza ukucacisa ubuqotho babaphikisi ku-PCB.Khetha ububanzi obufanele ku-multimeter ngesilinganiso sokumelana bese uthinta ithiphu ye-probe kuzo zombili iziphetho zesiphikisa.I-resistor enempilo kufanele inikeze ukumelana ngaphakathi kokubekezelelana okuboniswa ikhodi yayo yombala.Uma ukufundwa kuvaliwe kakhulu, i-resistor ingase idinge ukushintshwa.
Isinyathelo sesi-5: Ama-Capacitor okuhlola:
Ama-Capacitor yizingxenye ezibalulekile ezivame ukwehluleka.Ukuze uqinisekise ukusebenza kwayo, setha i-multimeter kumodi ye- "capacitance".Khomba amatheminali amahle nebi we-capacitor bese ubeka ama-multimeter probes ngokufanele.I-multimeter izobonisa inani le-capacitance, ongayiqhathanisa ne-capacitance ephawulwe engxenyeni.Amanani ahluke kakhulu angase abonise i-capacitor enephutha.
Ngokulandela izinyathelo ezingenhla, ungasebenzisa ngempumelelo i-multimeter ukuze uhlole futhi uhlole izinkinga ku-PCB.Khumbula ukuthi ukubekezela nokugxila kubalulekile phakathi nale nqubo ukuze kuqinisekiswe imiphumela enembile futhi ugweme ukulimala okwengeziwe.Ngokukhomba kahle amaphutha, ungaqala ukulungisa ngokuzethemba, wenze amaphrojekthi aphumelele we-elekthronikhi futhi uthuthukise amakhono akho okuxazulula izinkinga.Jabulela ukuhlola nokulungiswa!
Isikhathi sokuthumela: Jul-31-2023