Uyilo olufanelekileyo lwe PCB amacandelo ekuqhubeni i-SMD yeyona nto ifunekayo yokuyila imizobo yePCB ekumgangatho ophezulu. Iimfuno zoyilo lwecandelo ikakhulu zibandakanya ufakelo, amandla, ubushushu, umqondiso, kunye neemfuno zobuhle.

1. Ukufakwa
Ibhekisa kuthotho lweziseko ezicetywayo ukuze kufakwe ngokutyibilikayo ibhodi yesekethe kwi-chassis, iqokobhe, slot, njl., ngaphandle kokuphazamiseka kwendawo, isiphaluka esifutshane kunye nezinye iingozi, kwaye wenze isinxibelelanisi esichongiweyo kwindawo echongiweyo kwi-chassis okanye iqokobhe. phantsi kwezihlandlo ezithile zesicelo. Funa.

2. amandla

Ibhodi yesekethe kwi-SMD processing kufuneka ikwazi ukumelana nemikhosi eyahlukeneyo yangaphandle kunye nee-vibrations ngexesha lofakelo kunye nomsebenzi. Ngenxa yesi sizathu, ibhodi yesiphaluka kufuneka ibe nesimo esifanelekileyo, kwaye izikhundla zemingxuma eyahlukeneyo (imingxuma yokukrazula, imingxuma ekhethekileyo) ebhodini kufuneka ilungiswe ngokufanelekileyo. Ngokuqhelekileyo, umgama phakathi komngxuma kunye nomda webhodi kufuneka ube mkhulu ubuncinane kunobubanzi bomngxuma. Ngexesha elifanayo, kufuneka kuqatshelwe ukuba icandelo elibuthathaka kakhulu leplate elibangelwa ngumngxuma owenziwe ngokukodwa kufuneka libe namandla okwaneleyo okugoba. Izixhumi “ezandisa” ngokuthe ngqo kwigobolondo lesixhobo ebhodini kufuneka zilungiswe ngokufanelekileyo ukuqinisekisa ukuthembeka kwexesha elide.

3. Ubushushu

Kwizixhobo zamandla aphezulu kunye nokuvelisa ukushisa okukhulu, ngaphezu kokuqinisekisa iimeko zokutshatyalaliswa kobushushu, kufuneka zifakwe kwiindawo ezifanelekileyo. Ngokukodwa kwiinkqubo ze-analog eziyinkimbinkimbi, ingqwalasela ekhethekileyo kufuneka ihlawulwe kwimiphumo emibi yentsimi yokushisa eyenziwa zezi zixhobo kwisekethe ye-fragile preamplifier. Ngokubanzi, inxalenye enegunya elikhulu kakhulu kufuneka yenziwe ibe yimodyuli ngokwahlukileyo, kwaye amanyathelo athile okuzihlukanisa kwe-thermal kufuneka athathwe phakathi kwayo kunye nesekethe yokucwangcisa umqondiso.

4. Umqondiso

Ukuphazamiseka komqondiso yeyona nto ibalulekileyo ekufuneka iqwalaselwe kuyilo loyilo lwePCB. Ezona nkalo zisisiseko zezi: isiphaluka somqondiso obuthathaka sahluliwe okanye sikwahlulwe kumjikelo womqondiso oqinileyo; inxalenye ye-AC yahlulwe kwinxalenye ye-DC; inxalenye yefrikhwensi ephezulu yahlulwe kwinxalenye ephantsi yefrikhwensi; nikela ingqalelo kwisalathiso somgca womqondiso; uyilo lomgca womhlaba; ukhuselo olufanelekileyo kunye nokuhluza kunye neminye imilinganiselo.

5. Enhle

Akuyimfuneko kuphela ukuqwalasela ukubekwa okucocekileyo kunye nocwangco kwamacandelo, kodwa kunye ne-wiring enhle kwaye egudileyo. Ngenxa yokuba ama-laymen aqhelekileyo ngamanye amaxesha agxininisa angaphambili ngakumbi ukuze avavanye icala elinye iinzuzo kunye neengxaki zoyilo lwesekethe, kumfanekiso wemveliso, owokuqala kufuneka anikwe ingqwalaselo ephambili xa iimfuno zokusebenza zingekho rhabaxa. Nangona kunjalo, kwiimeko eziphezulu zokusebenza, ukuba kufuneka usebenzise ibhodi ephindwe kabini, kwaye ibhodi yesiphaluka nayo ifakwe kuyo, ngokuqhelekileyo ingabonakali, kwaye i-aesthetics ye-wiring kufuneka ibekwe phambili.