1. Musanayambe kuwotcherera, ikani flux pa pad ndikuyiyika ndi chitsulo chosungunulira kuti pad zisamangidwe bwino kapena oxidized, zomwe zimapangitsa kuti zikhale zovuta kugulitsa.Nthawi zambiri, chip sichiyenera kuthandizidwa.
2. Gwiritsani ntchito ma tweezers kuti muyike mosamala chipangizo cha PQFP pa bolodi la PCB, kusamala kuti musawononge zikhomo.Gwirizanitsani ndi mapepala ndikuwonetsetsa kuti chip chimayikidwa m'njira yoyenera.Sinthani kutentha kwa chitsulo chosungunula kupitirira madigiri 300 Celsius, kuviika nsonga ya chitsulo chosungunulira ndi solder pang'ono, gwiritsani ntchito chida kukanikiza pansi pa chipangizocho, ndikuwonjezera kusinthasintha pang'ono kwa awiriwo. mapini, dinanibe pansi pa chip ndikugulitsa zikhomo ziwiri zokhala ndi diagonally kuti chip chikhazikike ndipo sichingasunthe.Mutatha kulumikiza ngodya zotsutsana, yang'ananinso malo a chip kuti agwirizane.Ngati ndi kotheka, zikhoza kusinthidwa kapena kuchotsedwa ndi kugwirizananso pa bolodi PCB.
3. Mukayamba kugulitsa zikhomo zonse, onjezerani solder kunsonga kwachitsulo chosungunula ndikuvala zikhomo zonse ndi flux kuti zikhomo zikhale zonyowa.Gwirani nsonga yachitsulo chowotchera mpaka kumapeto kwa pini iliyonse pa chip mpaka mutawona solder ikuyenda mu pini.Mukawotcherera, nsonga yachitsulo chosungunuka ifanane ndi pini yomwe ikugulitsidwa kuti isagwirizane chifukwa cha soldering kwambiri.
4 .Pambuyo pa soldering zikhomo zonse, zilowerereni zikhomo zonse ndi flux kuyeretsa solder.Pukutsani solder yochulukirapo ngati pakufunika kuti muchotse zazifupi ndi zophatikizika.Pomaliza, gwiritsani ntchito ma tweezers kuti muwone ngati pali nsonga zabodza.Kuyendera kukamalizidwa, chotsani kusuntha kwa gulu ladera.Lumikizani burashi yolimba-bristle mu mowa ndikupukuta mosamala motsatira malangizo a mapini mpaka kutulukako kutha.
5. Zida za SMD resistor-capacitor ndizosavuta kugulitsa.Mukhoza choyamba kuyika malata pa olowa solder, kenaka kuika mapeto a chigawo chimodzi, ntchito tweezers atseke chigawo chimodzi, ndipo pambuyo soldering mbali imodzi, fufuzani ngati anaika molondola;Ngati izo zikugwirizana, kuwotcherera mapeto ena.
Pankhani ya masanjidwe, pamene kukula kwa bolodi la dera ndi lalikulu kwambiri, ngakhale kuwotcherera ndikosavuta kuwongolera, mizere yosindikizidwa idzakhala yotalikirapo, cholepheretsa chidzawonjezeka, mphamvu yotsutsa phokoso idzachepa, ndipo mtengo udzawonjezeka;ngati ndi yaying'ono kwambiri, kutentha kwa kutentha kumachepa, kuwotcherera kumakhala kovuta kuwongolera, ndipo mizere yoyandikana nayo idzawonekera mosavuta.Kusokonezana, monga kusokoneza ma electromagnetic kuchokera pama board ozungulira.Choncho, PCB bolodi kapangidwe ayenera wokometsedwa:
(1) Kufupikitsa kugwirizana pakati pa zigawo zapamwamba kwambiri ndikuchepetsa kusokoneza kwa EMI.
(2) Zigawo zolemera kwambiri (monga kupitirira 20g) ziyenera kukhazikitsidwa ndi mabulaketi ndiyeno welded.
(3) Nkhani zowononga kutentha ziyenera kuganiziridwa kuti zikhale zotentha kuti ziteteze zolakwika ndi kukonzanso chifukwa cha ΔT yaikulu pa chigawocho.Zigawo zomwe zimakhudzidwa ndi kutentha ziyenera kusungidwa kutali ndi magwero a kutentha.
(4) Zigawozi ziyenera kukonzedwa mofanana momwe zingathere, zomwe sizongokongola komanso zosavuta kuwotcherera, ndipo ndizoyenera kupanga zambiri.Bolodi yozungulira idapangidwa kuti ikhale rectangle ya 4:3 (yabwino).Musakhale ndi kusintha kwadzidzidzi mu m'lifupi mwa waya kuti mupewe ma discontinuities a waya.Pamene bolodi la dera likutenthedwa kwa nthawi yaitali, zojambulazo zamkuwa zimakhala zosavuta kukulitsa ndi kugwa.Choncho, kugwiritsa ntchito madera akuluakulu a zojambulazo zamkuwa kuyenera kupewedwa.