1. Ngaphambi kokushiswa, faka i-flux ephepheni bese uyiphatha ngensimbi elungiselelwe ukuvikela i-pad ukuthi ingafakwanga kahle noma i-oxidid, okubangela ubunzima bokuthengisa kahle. Ngokuvamile, i-chip ayidingi ukuphathwa.
2. Sebenzisa ama-tweezers ukuze ubeke ngokucophelela i-chip ye-PQFP kwibhodi le-PCB, uqaphele ukuthi ungalimazi izikhonkwane. Yivumelanisa nama-pads futhi uqiniseke ukuthi i-chip ibekwe ngendlela efanele. Lungisa amazinga okushisa wensimbi elungiselelwe ku-300 degrees Celsius, afake umxhwele i-tip ye-iron ye-solden ene-chip ehambisanayo, bese ufaka i-flux yokugcwalisa i-chip, bese ufaka ama-chip ama-diagonal Ngemuva kokuphoqa amakona aphambene, abuye abuye abuye abuyele endaweni ye-Chip ukuze aqondanise. Uma kunesidingo, kungalungiswa noma kususwe futhi kuqondaniswe kabusha ebhodini le-PCB.
3. Lapho uqala ukuthengisa zonke izikhonkwane, engeza umthengisi esiqeshini sensimbi ethengisa futhi ijazi zonke izikhonkwane zonke izikhonkwane ezinama-flux ukugcina izikhonkwane zokugcina izikhonkwane ukuze zigcine izikhonkwane ukuze zigcine izikhonkwane zokugcina umswakama. Thinta ithiphu yensimbi yokuthengisa kuze kube sekupheleni kwephini ngalinye ku-chip uze ubone umthengisi ugeleza ungene kwi-PIN. Lapho i-welding, gcina ichopho lensimbi ehamba ngensimbi ehambisana ne-PIN ethengiswa ukuvikela ukugqagqana ngenxa yokuthengisa ngokweqile ngenxa yokuthengisa ngokweqile.
4. Ngemuva kokuthengisa zonke izikhonkwane, cwilisa zonke izikhonkwane nge-flux ukuze uhlanze umthengisi. Sula i-solerder eyeqile lapho kudingeka khona ukuqeda noma yiziphi izikhindi kanye nokubheja. Ekugcineni, sebenzisa ama-tweezers ukubheka ukuthi ngabe kukhona yini ukuthengisa okungamanga. Ngemuva kokuthi ukuhlolwa kuqediwe, susa i-flux ebhodini lesekethe. Donsela ibhulashi elilukhuni ngotshwala bese ulisusa ngokucophelela eceleni kwendawo yezikhonkwane kuze kube yilapho i-flux inyamalala.
5. Izakhi ze-SMD Resistor-capacitor kulula kakhulu ukuthengisa. Ungaqala ukufaka i-tin kuhlanganiswe okuhlanganisiwe, bese ubeka isiphetho esisodwa sengxenye, sebenzisa ama-tweezers ukubopha ingxenye, nangemva kokugcina okukodwa, hlola ukuthi libekwe kahle; Uma kuqondaniswe, kwembula omunye umkhawulo.
Ngokwesakhiwo, lapho usayizi webhodi yesekethe mkhulu kakhulu, yize ukufudumala kulula ukulawula, imigqa ephrintiwe izokwenyuka, amandla okulwa nomsindo azokwehla, futhi izindleko zizokwenyuka; Uma incane kakhulu, ukuhlukaniswa kokushisa kuzokwehla, ukufudumala kuzoba nzima ukulawula, futhi imigqa eseduze izovela kalula. Ukuphazanyiswa kwabavumelanayo, njengokuphazanyiswa kwe-electromagnetic kusuka kumabhodi wesifunda. Ngakho-ke, umklamo webhodi le-PCB kumele ulungiswe kahle:
(1) Fushanisa ukuxhumana phakathi kwezinto ezivame ukwehla futhi unciphise ukuphazamiseka kwe-EMI.
(2) Izakhi ezinesisindo esindayo (ezinjenge-20G) kufanele zilungiswe ngamabakaki bese zifakwa.
. Izakhi ezibucayi ezishisayo kufanele zigcinwe kude nemithombo yokushisa.
. Ibhodi yesekethe lenzelwe ukuba libe ngu-4: 3 unxande (okuthandayo). Ungabi noshintsho olungazelelwe ku-wire ububanzi ukugwema ukunqanyulwa kwe-wiring. Lapho ibhodi yesekethe ifudunyezwa isikhathi eside, i-foil ye-Copper kulula ukuyikhulisa bese iwela. Ngakho-ke, ukusetshenziswa kwezindawo ezinkulu ze-foil yethusi kufanele kugwenywe.
