Umqondo ojwayelekile we-9 weImboni ye-PCBukuhlolwa kwebhodi lesifunda kwethulwa kanje:
1. Akuvunyelwe ngokuphelele ukusebenzisa okokusebenza kokuhlola okusekelwe phansi ukuze uthinte i-TV ebukhoma, umsindo, ividiyo nezinye izinto zokusebenza zepuleti elingezansi ukuze uhlole ibhodi le-PCB ngaphandle kwesiguquli sokuhlukanisa.
Kwenqatshelwe ngokuphelele ukuhlola ngokuqondile i-TV, umsindo, ividiyo nezinye izinto zokusebenza ngaphandle kwesiguquli sokuhlukanisa amandla esinezinsimbi nezinto zokusebenza ezinezivikelo ezisekelwe phansi.Nakuba irekhoda yekhasethi yomsakazo evamile inesiguquli samandla, lapho uhlangana ne-TV ekhethekile noma imishini yokulalelwayo, ikakhulukazi amandla aphumayo noma uhlobo lwamandla asetshenziswayo, kufanele uqale uthole ukuthi i-chassis yomshini ishajiwe yini. , ngaphandle kwalokho kuzoba lula kakhulu I-TV, i-audio kanye nezinye izinto zokusebenza ezikhokhiswa ipuleti eliphansi lidala isifunda esifushane sokunikezwa kwamandla, okuthinta isifunda esihlanganisiwe, okubangela ukwanda okuqhubekayo kwephutha.
2. Naka ukusebenza kwe-insulation ye-soldering iron lapho uhlola ibhodi le-PCB
Akuvunyelwe ukusebenzisa i-solder iron for soldering ngamandla.Qinisekisa ukuthi i-soldering iron ayikhokhiswa.Gcoba igobolondo le-soldering iron.Qaphela ngesekhethi ye-MOS.Kuphephe kakhudlwana ukusebenzisa insimbi yesekethe ye-low-voltage engu-6~8V.
3. Ngaphambi kokuhlola ibhodi le-PCB, qonda isimiso sokusebenza samasekhethi ahlanganisiwe namasekhethi ahlobene
Ngaphambi kokuhlola nokulungisa isekethe ehlanganisiwe, kufanele uqale wazi umsebenzi wesekethe ehlanganisiwe esetshenzisiwe, isifunda sangaphakathi, imingcele eyinhloko kagesi, indima yephini ngalinye, kanye ne-voltage evamile yephini, i-waveform kanye nokusebenza. isimiso sesekhethi esakhiwe izingxenye ze-peripheral.Uma izimo ezingenhla zihlangene, ukuhlaziya nokuhlola kuzoba lula kakhulu.
4. Ungabangeli ukujikeleza okufushane phakathi kwamaphini lapho uhlola ibhodi le-PCB
Lapho ukala i-voltage noma uhlola ama-waveforms nge-oscilloscope probe, ungabangeli isekethe emfushane phakathi kwamaphini wesekethe ehlanganisiwe ngenxa yokuslayida kwemikhondo yokuhlola noma ama-probe, futhi ulinganise kumjikelezo ophrintiwe oxhumeke ngqo kumaphini.Noma iyiphi isekethe yesikhashana ingalimaza kalula isekethe edidiyelwe.Kufanele uqaphele kakhulu lapho uhlola amasekhethi ahlanganisiwe e-CMOS anephakheji eliyisicaba.
5. Ukumelana kwangaphakathi kwethuluzi lokuhlola ibhodi le-PCB kufanele kube kukhulu
Lapho kulinganiswa i-voltage ye-DC yezikhonkwane ze-IC, i-multimeter enokumelana kwangaphakathi kwekhanda lemitha elikhulu kuno-20KΩ/V kufanele isetshenziswe, ngaphandle kwalokho kuzoba nephutha elikhulu lokulinganisa le-voltage yamanye amaphini.
6. Naka ukuchithwa kokushisa kwesekethe ehlanganisiwe yamandla lapho uhlola ibhodi le-PCB
Isifunda esihlanganisiwe samandla kufanele sibe nokushisa okuhle kokushisa, futhi akuvunyelwe ukusebenza esimweni samandla aphezulu ngaphandle kokushisa kokushisa.
7. Intambo eholayo yebhodi le-PCB kufanele ihlolwe ngokufanele
Uma udinga ukungeza izingxenye zangaphandle ukuze ungene esikhundleni sezingxenye ezilimele zesekethe ehlanganisiwe, izingxenye ezincane kufanele zikhethwe, futhi izintambo kufanele zibe nengqondo ukuze ugweme ukuhlangana kwe-parasitic okungadingekile, ikakhulukazi ukumiswa phakathi kwesekethe ehlanganisiwe yomsindo we-amplifier kanye nesiphetho sesekhethi yangaphambili. .
8. Ukuhlola ibhodi le-PCB ukuqinisekisa ikhwalithi yokushisela
Lapho i-soldering, i-solder iqinile, futhi ukuqoqwa kwe-solder nama-pores kungenzeka kubangele ukuthungatha okungamanga.Isikhathi se-soldering ngokuvamile asidluli imizuzwana engu-3, futhi amandla ensimbi e-solder kufanele abe ngu-25W ngokufudumeza kwangaphakathi.Isifunda esihlanganisiwe esidayisiwe kufanele sihlolwe ngokucophelela.Sebenzisa i-ohmmeter ukukala ukuthi kukhona yini isifunda esifushane phakathi kwezikhonkwane, qinisekisa ukuthi akukho ukunamathela kwe-solder, bese uvula amandla.
9. Ungahluleli umonakalo wesekethe ehlanganisiwe kalula lapho uhlola i-Ibhodi le-PCB
Ungahluleli ukuthi isifunda esihlanganisiwe sonakaliswa kalula.Ngenxa yokuthi amasekhethi amaningi ahlanganisiwe ahlanganiswe ngokuqondile, uma isekethe ingavamile, ingase ibangele izinguquko eziningi zamandla kagesi, futhi lezi zinguquko azibangelwa ukulimala kwesekethe ehlanganisiwe.Ngaphezu kwalokho, kwezinye izimo, i-voltage elinganisiwe yephini ngalinye ihlukile ku-voltage evamile.Uma amanani ehambisana noma eseduze, angahle angabonisi ukuthi isekethe ehlanganisiwe muhle.Ngoba amanye amaphutha athambile ngeke abangele izinguquko ku-voltage ye-DC.
Ikhaya -Mayelana ne-Hengxinyi -Isibonisi sebhodi lesifunda -Imingcele yenqubo -Ukugeleza kokukhiqiza