Raws li cov kws tshaj lij, ib qho 25-watt soldering hlau yog qhov kev xaiv zoo tshaj plaws rau kev tiv thaiv mounting, uas muab cov cua sov mus txog 3000 degrees. Qhov tseeb yog tias muaj ntau cov cua sov tshaj tawm hauv xov tooj cua ua rau muaj qhov tsis ua haujlwm ntxov.
Nws yog qhov tsim nyog
Soldering hlau, flux, ham, hlau txiav, ntawv, tweezers
Cov Lus Qhia
Kauj ruam 1
Ntxiv nrog rau cov hlau soldering, koj yuav tsum muaj qhov sawv ntsug, POS-61 qib ham hauv daim ntawv ntawm xaim ib qho tuab. Tsis txhob hnov qab txog cov flux - ib yam khoom rau degreasing thiab tshem tawm oxide ntawm qhov chaw ua haujlwm. Los ntawm txoj kev, koj tuaj yeem ua koj tus kheej. Ua li no, koj yuav tsum sau lub vial nrog cawv, ntxiv cov rosin crushed muaj thiab co kom txog thaum yaj tag. Yog tias koj ua haujlwm ntawm lub rooj noj mov tsis tu ncua, tom qab ntawd kom nws nyob nyab xeeb, muab ib daig ntawv me me, duab ntoo los yog plexus rau nws. Los ntawm cov cuab yeej, tej zaum koj yuav xav tau lub tshuab txiav me me, cov ntawv, cov tais daig thiab pob zeb tawv, thiab los ntawm cov twj paj nruag - digital tester.
Kauj ruam 2
Sov cov hlau soldering rau 15-20 feeb, muab nws rau hauv rosin thiab tom qab ntawd hauv ham. Yog hais tias ib feem yog qhov qub thiab qhov saum npoo yog them nrog oxide, nws yuav tsum ua kom zoo plated nrog qis yaj roj.
Kauj ruam 3
Thaum siv ham muab tshuaj, nyem nws tawm mus rau hauv cheeb tsam soldering. Ua ntej koj pib soldering lub microcircuit, ntxiv rau cov kab ntawm lub rooj tsavxwm, npog ob txhais ceg ntawm microcircuit nrog muab tshuaj txhuam, tshwj xeeb tshaj yog nyob rau QFN. Ntawm no, grease lub pins zoo nrog muab tshuaj txhuam thiab npog lawv nrog ib txheej nyias, thaum cov tshuaj txhuam yuav tsum tsis txhob nkag hauv qab ntawm QFN board.
Kauj ruam 4
Yog tias koj txiav txim siab ham lub microcircuit rau lub rooj tsavxwm, qhov twg muaj vias thiab lem hauv qab rooj plaub, tom qab ntawd nws zoo dua rau kev txiav tawm lub dab dej kub lub hauv paus ntawm rooj plaub. Qhov no tau ua tiav siv cov round lossis square tooj liab pas nrig uas yog ib zaug thiab ib nrab zaus thinner dua li qhov dav ntawm qhov cua sov lub hauv paus puag.
Kauj ruam 5
Tom qab ntawd, maj mam txiav lub microcircuit hauv ib qho chaw ua haujlwm, tso cov ntawv txuas rau hauv qab ntawm lub puab tsaig ntawm tus thawj, thiab tawg tawm lub hauv paus nrog ceev faj taw ntawm lub bar. Thov soldering ntsis taub rau cov resistor nrog rau tag nrho cov spatula. Yog li, koj yuav muab cov kev ua kom kub zoo tshaj plaws thiab ua kom cov soldering sai dua thiab zoo dua. Txhawm rau tiv thaiv cov flux los ntawm evaporating thaum lub sijhawm ntawm soldering, thov nws ua ntej soldering, thaum txhua yam npaj tiav ua haujlwm. Zoo soldering yog cim los ntawm nyias, txawm, ci ci txheej ntawm solidified solder, tsis muaj sagging thiab cov kab nrib pleb.
