Emsebenzini wokuklama wesikhathi eside, abantu baye bafingqa imithetho eminingi.Uma lezi zimiso zingalandelwa ekwakhiweni kwesekethe, kuzoba yinzuzo ekulungiseni iphutha okunembile kwe-ibhodi lesifunda eliphrintiwe(PCB)ukulawula isofthiwe kanye nokusebenza okuvamile kwesekethe yehadiwe.Kafushane, izimiso okufanele zilandelwe yilena elandelayo:
(1) Ngokuphathelene nokuhlelwa kwezingxenye, izingxenye ezihlobene nomunye nomunye kufanele zibekwe eduze ngangokunokwenzeka.Isibonelo, ijeneretha yewashi, i-crystal oscillator, ukuphela kokufaka kwewashi kwe-CPU, njll., kujwayele ukudala umsindo.Uma zibekwe, kufanele zibekwe eduze.
(2) Zama ukufaka ama-decoupling capacitor eduze kwezingxenye ezibalulekile ezifana ne-ROM, RAM namanye ama-chip.Amaphuzu alandelayo kufanele aqashelwe lapho ubeka ama-decoupling capacitors:
1) Ukuphela kokufaka kwamandla kwebhodi lesekethe ephrintiwe(PCB) kuhlanganiswe ne-electrolytic capacitor engaba ngu-100uF.Uma ivolumu ivumela, umthamo omkhulu uzoba ngcono.
2) Empeleni, i-ceramic chip capacitor engu-0.1uF kufanele ibekwe eceleni kwe-IC chip ngayinye.Uma igebe lebhodi lesekethe eliphrintiwe(PCB) lincane kakhulu ukuthi lingabekwa, i-1-10uF tantalum capacitor ingafakwa cishe kuwo wonke ama-chips ayi-10.
3) Ezingxenyeni ezinekhono elibuthakathaka lokulwa nokuphazamiseka kanye nezingxenye zokugcina ezifana ne-RAM ne-ROM ezinokuhluka okukhulu kwamanje lapho sicishwa, ama-capacitor axhumayo kufanele axhunywe phakathi kwentambo yamandla (VCC) nentambo yaphansi (GND).
4) I-capacitor lead akufanele ibe yinde kakhulu.Ikakhulukazi, i-high frequency printed circuit board(PCB) bypass capacitors akufanele iphathe imikhondo.
(3) Izixhumi zivame ukubekwa onqenqemeni lwebhodi lesifunda ukuze kube lula ukufakwa nokusebenza kwezintambo ngemuva.Uma ingekho indlela, ingafakwa phakathi kwebhodi, kodwa zama ukugwema ukwenza kanjalo.
(4) Ekuhlelweni kwezingxenye okwenziwa ngesandla, ukusebenziseka kalula kwezintambo kufanele kubhekwe ngangokunokwenzeka.Ezindaweni ezinezintambo eziningi, isikhala esanele kufanele sibekwe eceleni ukuze kugwenywe ukuvinjelwa kwezintambo.
(5) Isekhethi yedijithali kanye nesekhethi ye-analog kufanele ihlelwe ezifundeni ezahlukene.Uma kungenzeka, isikhala sika-2-3mm phakathi kwabo kufanele sifaneleke ukugwema ukugxambukela.
(6) Kumasekhethi angaphansi kwengcindezi ephezulu kanye nephansi, isikhala esingaphezu kuka-4mm kufanele sibekwe eceleni phakathi kwawo ukuze kuqinisekiswe ukwethembeka okuphezulu ngokwanele kokufakwa kukagesi.
(7) Ukuhlelwa kwezingxenye kufanele kuhlanzeke futhi kube kuhle ngangokunokwenzeka.
Isikhathi sokuthumela: Nov-16-2020
