1. Ua ntej vuam, siv cov flux ntawm lub ncoo thiab kho nws nrog cov hlau nplaum kom tiv thaiv lub ncoo los ntawm kev ua tsis zoo tinned los yog oxidized, ua rau nyuaj rau soldering. Feem ntau, cov nti tsis tas yuav kho.
2. Siv cov tweezers ua tib zoo tso PQFP nti rau ntawm lub rooj tsavxwm PCB, ceev faj kom tsis txhob ua kom cov pins puas. Teem nws nrog cov ntaub qhwv thiab xyuas kom tseeb tias cov nti tau muab tso rau hauv qhov tseeb. Kho qhov kub ntawm cov hlau soldering mus rau ntau tshaj 300 degrees Celsius, dip lub taub hau ntawm lub soldering hlau nrog ib tug me me npaum li cas ntawm solder, siv ib tug lub cuab tam los nias rau ntawm lub aligned nti, thiab ntxiv ib tug me me flux rau ob kab pheeb ces kaum. pins, tseem nias rau ntawm lub nti thiab solder ob diagonally positioned pins kom lub nti yog tsau thiab txav tsis tau. Tom qab soldering cov ces kaum sab nraud, rov xyuas lub nti txoj hauj lwm rau kev sib tw. Yog tias tsim nyog, nws tuaj yeem hloov kho lossis tshem tawm thiab rov ua kom zoo dua ntawm PCB pawg thawj coj saib.
3. Thaum pib solder tag nrho cov pins, ntxiv solder rau lub ntsis ntawm cov hlau soldering thiab coated tag nrho cov pins nrog flux kom cov pins moist. Kov qhov kawg ntawm cov hlau soldering mus rau qhov kawg ntawm txhua tus pin ntawm lub nti kom txog thaum koj pom cov hlau ntws mus rau hauv tus pin. Thaum welding, tuav lub hau ntawm cov hlau sib txuas mus rau tus pin raug soldered los tiv thaiv kev sib tshooj vim yog cov khoom siv ntau dhau.
4. Tom qab soldering tag nrho cov pins, tsau tag nrho cov pins nrog flux los ntxuav lub solder. So tawm cov solder tshaj qhov xav tau los tshem tawm cov luv luv thiab sib tshooj. Thaum kawg, siv cov tweezers los xyuas seb puas muaj cov khoom cuav. Tom qab kev soj ntsuam tiav lawm, tshem tawm cov flux ntawm lub rooj tsav xwm Circuit Court. Muab cov txhuam txhuam tawv tawv hauv dej cawv thiab so kom zoo raws li cov kev taw qhia ntawm cov pins kom txog thaum cov flux ploj mus.
5. SMD resistor-capacitor Cheebtsam yog qhov yooj yim rau solder. Koj tuaj yeem ua ntej muab tin rau ntawm ib qho kev sib koom ua ke, tom qab ntawd muab ib qho kawg ntawm cov khoom siv, siv cov tweezers los clamp cov khoom, thiab tom qab soldering ib kawg, xyuas seb nws puas tau muab tso rau kom raug; Yog hais tias nws yog aligned, weld lwm kawg.
Nyob rau hauv cov nqe lus ntawm layout, thaum qhov loj ntawm lub rooj tsavxwm Circuit Court yog loj heev, txawm hais tias lub vuam yog yooj yim los tswj, cov ntawv luam tawm yuav ntev dua, impedance yuav nce, lub peev xwm los tiv thaiv lub suab nrov yuav txo, thiab tus nqi yuav nce; yog tias nws me dhau lawm, cov cua sov dissipation yuav txo qis, cov vuam yuav nyuaj rau kev tswj, thiab cov kab uas nyob ib sab yuav yooj yim tshwm sim. Kev sib cuam tshuam, xws li electromagnetic cuam tshuam los ntawm Circuit Court boards. Yog li, PCB board tsim yuav tsum tau optimized:
(1) Txo cov kev sib txuas ntawm cov khoom siv ntau zaus thiab txo EMI cuam tshuam.
(2) Cheebtsam nrog hnyav hnyav (xws li ntau tshaj 20g) yuav tsum tau kho nrog brackets thiab ces welded.
(3) Thaum tshav kub kub dissipation teeb meem yuav tsum raug txiav txim siab rau cov khoom siv cua sov kom tsis txhob muaj qhov tsis xws luag thiab rov ua haujlwm vim qhov loj ΔT ntawm cov khoom siv. Thermal rhiab Cheebtsam yuav tsum tau khaws cia kom deb ntawm qhov chaw tshav kub.
(4) Lub Cheebtsam yuav tsum tau teem kom sib npaug li sai tau, uas tsis yog tsuas yog zoo nkauj xwb tab sis kuj yooj yim rau welding, thiab yog haum rau loj ntau lawm. Lub rooj tsav xwm hauv Circuit Court yog tsim los ua ib daim duab plaub 4: 3 (zoo dua). Tsis txhob muaj kev hloov pauv tam sim ntawm cov hlau dav kom tsis txhob muaj kev cuam tshuam ntawm kev sib txuas. Thaum lub Circuit Court board yog rhuab rau ib ntev lub sij hawm, cov ntawv ci tooj liab yog ib qho yooj yim mus nthuav thiab poob tawm. Yog li ntawd, kev siv ntawm qhov loj ntawm cov ntawv ci tooj liab yuav tsum raug zam.