1. Iimfuno ezisisiseko zenkqubo ye-SMT kuyilo lwecandelo loyilo zezi zilandelayo:
Ukuhanjiswa kwamacandelo kwibhodi yesekethe eprintiweyo kufuneka ifane ngokusemandleni.Umthamo wobushushu wokuphinda uqukunjelwe i-solder yamacandelo amakhulu omgangatho mkhulu, kwaye ugxininiso olugqithisileyo kulula ukubangela ubushushu obuphantsi bendawo kwaye bukhokhelele kwi-solder yenyani.Ngexesha elifanayo, ulungelelwaniso olufanayo lukwalungele ukulinganisela kweziko lomxhuzulane.Kwimifuniselo ye-vibration kunye nempembelelo, akukho lula ukonakalisa amacandelo, imingxuma enesinyithi kunye neepads ze-solder.
2. Isalathiso sokulungelelaniswa kwamacandelo kwibhodi yesekethe eprintiweyo kufuneka ifane kangangoko kunokwenzeka kumacandelo afanayo, kwaye ulwalathiso lweempawu kufuneka lube yinto efanayo ukuququzelela ukufakwa, i-welding kunye nokufumanisa amacandelo.Ukuba i-electrolytic capacitor positive pole, i-diode positive pole, i-transistor enye yepini ekupheleni, ipini yokuqala yendlela yolungiselelo lwesekethe edibeneyo iyahambelana kangangoko kunokwenzeka.Indlela yoshicilelo yawo onke amanani amacandelo iyafana.
3. Amacandelo amakhulu kufuneka ashiywe malunga ne-SMD rework izixhobo zokufudumeza intloko inokuqhutywa ubungakanani.
4. Amacandelo okufudumeza kufuneka abe kude kunamanye amacandelo kunokwenzeka, abekwe ngokubanzi kwikona, indawo yokufaka umoya webhokisi.Amacandelo okufudumeza kufuneka axhaswe ngezinye izikhokelo okanye ezinye izixhaso (ezifana ne-heat sink) ukugcina umgama othile phakathi kwezinto zokufudumeza kunye nomgangatho webhodi yesekethe eprintiweyo, kunye nomgama omncinci we-2mm.Amacandelo okufudumala adibanisa amacandelo okufudumala kunye neebhodi zeesekethe eziprintiweyo kwiibhodi ezininzi.Ekuqulunqeni, iipadi ze-solder zetsimbi zenziwe, kwaye ekuqhutyweni, i-solder isetyenziselwa ukudibanisa, ukwenzela ukuba ukushisa kukhutshwe ngeebhodi zeesekethe eziprintiweyo.
5. Amalungu angevayo kubushushu kufuneka agcinwe kude nezinto ezivelisa ubushushu.Ezinjengama-audions, iisekethe ezidibeneyo, i-electrolytic capacitors kunye nezinye izinto zeplastiki zeplastiki, kufuneka zibe kude kude ne-bridge stack, amacandelo anamandla aphezulu, ii-radiator kunye ne-resistors-power-high-power.
6. Uyilo lwamacandelo kunye neengxenye ezifuna ukulungiswa okanye zitshintshwe rhoqo, njengee-potentiometers, ii-coil inductance adjustable, i-capacitor micro-switches eguquguqukayo, iityhubhu ze-inshurensi, izitshixo, iiplagi kunye nezinye izinto, kufuneka ziqwalasele iimfuno zesakhiwo somatshini wonke. , kwaye uzibeke kwindawo ekulula ukuyilungisa kunye nokubuyisela.Ukuba ukulungiswa komatshini, kufuneka kubekwe kwibhodi yesekethe eprintiweyo ukuququzelela ukulungiswa kwendawo;Ukuba ilungiswa ngaphandle komatshini, indawo yayo kufuneka ilungelelaniswe kwindawo yeqhosha lokulungelelanisa kwiphaneli ye-chassis ukuthintela ukungqubuzana phakathi kwesithuba esine-dimensional emithathu kunye ne-dimensional space.Umzekelo, ukuvulwa kwendawo yokutshintsha iqhosha kufuneka kuhambelane nendawo yesithuba sokutshintsha kwibhodi yesekethe eprintiweyo.
7. Umngxuma osisigxina kufuneka usekwe kufuphi netheminali, iplagi kunye neendawo zokutsalwa, indawo esembindini yetheminali ende kunye nenxalenye ehlala iphantsi kokunyanzeliswa, kwaye isithuba esihambelanayo kufuneka sishiywe sijikeleze umngxuma osisigxina ukuthintela ukuguqulwa ngenxa ukwanda kwe-thermal.Okufana nokwandiswa kwetheminali ende ye-thermal kunzulu ngakumbi kunebhodi yesekethe eprintiweyo, i-wave soldering ethandwa kakhulu kwi-warping phenomenon.
8. Kwamanye amacandelo kunye neenxalenye (ezifana ne-transformers, i-electrolytic capacitors, i-varistors, i-bridge stacks, i-radiator, njl.njl.) ngokunyamezela okukhulu kunye nokuchaneka okuphantsi, ikhefu phakathi kwabo kunye namanye amacandelo kufuneka linyuswe ngomda othile ngokwesiseko isicwangciso sokuqala.
9. Kucetyiswa ukuba umda wokunyuswa kwee-electrolytic capacitors, i-varistors, i-bridge stacks, i-polyester capacitors kunye nezinye ii-capacitors kufuneka zingabi ngaphantsi kwe-1mm, kunye ne-transformers, i-radiator kunye ne-resistors ezidlula i-5W (kuquka i-5W) kufuneka ibe ngaphantsi kwe-3mm.
10. I-electrolytic capacitor akufanele ichukumise izinto zokufudumeza, ezifana ne-resistors-power high-power, i-thermistors, i-transformers, i-radiator, njl njl. iradiyetha kufuneka ubuncinane ibe 20mm.
Ixesha lokuposa: Dec-09-2020