Isakhiwo esinengqondo se PCB izingxenye ekucutshungulweni kwe-SMD kuyisidingo esiyisisekelo sokuklama imidwebo ye-PCB yekhwalithi ephezulu. Izidingo zesakhiwo sengxenye ikakhulukazi zifaka ukufakwa, amandla, ukushisa, isignali, nezidingo zobuhle.

1. ukufakwa
Isho uchungechunge lwezinto eziyisisekelo ezihlongozwayo ukuze kufakwe kahle ibhodi lesifunda ku-chassis, igobolondo, i-slot, njll., ngaphandle kokuphazamiseka kwesikhala, isifunda esifushane nezinye izingozi, nokwenza isixhumi esimisiwe sibe endaweni emisiwe ku-chassis noma igobolondo. ngaphansi kwezikhathi ezithile zokufaka isicelo. Dinga.

2. amandla

Ibhodi lesifunda ekucutshungulweni kwe-SMD kufanele likwazi ukumelana namandla ahlukahlukene angaphandle kanye nokudlidliza ngesikhathi sokufakwa nomsebenzi. Ngenxa yalesi sizathu, ibhodi lesifunda kufanele libe nesimo esinengqondo, futhi izikhundla zemigodi ehlukahlukene (izimbobo ze-screw, izimbobo ezikhethekile) ebhodini kufanele zihlelwe ngokufanele. Ngokuvamile, ibanga phakathi kwembobo kanye nonqenqema lwebhodi kufanele okungenani libe likhulu kunobubanzi bomgodi. Ngesikhathi esifanayo, kufanele kuqashelwe ukuthi ingxenye ebuthakathaka kakhulu yepuleti ebangelwa umgodi owenziwe ngokukhethekile kufanele futhi ibe namandla okwanele okugoba. Izixhumi “ezinweba” ngokuqondile kusukela kugobolondo ledivayisi ebhodini kufanele zilungiswe ngokunengqondo ukuze kuqinisekiswe ukwethembeka kwesikhathi eside.

3. Ukushisa

Kumadivayisi anamandla aphezulu akhiqiza ukushisa okukhulu, ngaphezu kokuqinisekisa izimo zokulahla ukushisa, kufanele futhi abekwe ezindaweni ezifanele. Ikakhulukazi ezinhlelweni ze-analog eziyinkimbinkimbi, ukunakwa okukhethekile kufanele kukhokhwe emiphumeleni emibi yenkambu yokushisa ekhiqizwe yilawa madivayisi kumjikelezo we-preamplifier obuthakathaka. Ngokuvamile, ingxenye enamandla amakhulu kakhulu kufanele yenziwe imojula ngokwehlukana, futhi izinyathelo ezithile zokuhlukanisa ezishisayo kufanele zithathwe phakathi kwayo kanye nesekethe yokucubungula isignali.

4. Isiginali

Ukuphazamiseka kwesiginali kuyisici esibaluleke kakhulu okufanele sicatshangelwe ekwakhiweni kwesakhiwo se-PCB. Izici eziyisisekelo kakhulu yilezi: isifunda sesignali esibuthakathaka sihlukanisiwe noma sihlukanisiwe nesifunda sesignali esiqinile; ingxenye ye-AC ihlukaniswe nengxenye ye-DC; ingxenye yefrikhwensi ephezulu ihlukaniswe nengxenye yemvamisa ephansi; qaphela isiqondiso somugqa wesignali; ukwakheka komugqa ophansi; ukuvikela nokuhlunga okufanele Kanye nezinye izinyathelo.

5. Enhle

Akudingekile kuphela ukucabangela ukubekwa kahle nokuhlelekile kwezingxenye, kodwa futhi i-wiring enhle futhi ebushelelezi. Ngenxa yokuthi abantu abavamile abavamile ngezinye izikhathi bagcizelela okwangaphambili kakhulu ukuze bahlole ohlangothini olulodwa ubuhle nobubi bomklamo wesifunda, ukuze uthole isithombe somkhiqizo, owokuqala kufanele unikezwe kuqala lapho izidingo zokusebenza zingenokhahlo. Kodwa-ke, ezenzakalweni eziphezulu zokusebenza, uma kufanele usebenzise ibhodi elihlangene kabili, futhi ibhodi lesifunda liphinde lifakwe kulo, ngokuvamile lingabonakali, futhi ubuhle be-wiring kufanele bubekwe phambili.