Ukuba ubuzwa ukuba yintoni umbala webhodi yesekethe, ndiyakholelwa ukuba impendulo yokuqala yomntu wonke iluhlaza. Kuyavunywa ukuba, uninzi lweemveliso ezigqityiweyo kushishino lwePCB ziluhlaza. Kodwa ngophuhliso lobuchwepheshe kunye neemfuno zabathengi, iindidi zemibala ziye zavela. Buyela kumthombo, kutheni iibhodi ubukhulu becala ziluhlaza? Makhe sithethe ngayo namhlanje!
Inxalenye eluhlaza ibizwa ngokuba yi-solder block. Ezi zithako zii-resin kunye ne-pigments, inxalenye eluhlaza i-pigment eluhlaza, kodwa ngokuphuhliswa kobugcisa bale mihla, iye yandiswa kweminye imibala emininzi. Ayifani nepeyinti yokuhlobisa. Ngaphambi kokuba i-soldering iprintwe kwibhodi yesekethe, ukuxhathisa kwe-solder kukunamathisela kunye nokuhamba. Emva kokushicilela kwibhodi yesiphaluka, intlaka iyaqina ngenxa yobushushu ize ekugqibeleni “inyange.” Injongo yokumelana ne-welding kukuthintela ibhodi yesiphaluka kumswakama, i-oxidation kunye nothuli. Indawo kuphela engagqunywanga kwibhloko ye-solder idla ngokubizwa ngokuba yi-pad kwaye isetyenziselwa i-solder paste.
Ngokubanzi, sikhetha uhlaza ngenxa yokuba ayicaphukisi amehlo, kwaye akulula ukuba abasebenzi bemveliso kunye nokugcinwa bajonge kwi-PCB ixesha elide. Kuyilo, imibala esetyenziswa ngokuqhelekileyo iphuzi, emnyama kunye nebomvu. Imibala ipeyintwe kumphezulu emva kokuba yenziwe.
Esinye isizathu sikukuba umbala osetyenziswa ngokuqhelekileyo uluhlaza, ngoko umzi-mveliso uneyona peyinti eluhlaza, ngoko ixabiso leoli liphantsi. Oku kungenxa yokuba xa ulungiselela ibhodi yePCB, iingcingo ezahlukeneyo kulula ukwahlula kumhlophe, ngelixa abamnyama nabamhlophe kunzima ukubona. Ukuze ukwahlula amabakala ayo emveliso, umzi-mveliso ngamnye usebenzisa imibala emibini ukwahlula uluhlu oluphezulu olusuka kuluhlu oluphantsi. Umzekelo, i-Asus, inkampani ye-motherboard yekhompyuter, ibhodi etyheli inesiphelo esiphantsi, ibhodi yebhodi iphezulu. I-rebound ye-Yingtai iphezulu, kwaye ibhodi eluhlaza iphantsi.
1. Kukho iimpawu kwibhodi yesekethe: Ukuqala kwe-R yi-resistor, isiqalo se-L yi-coil ye-inductor (ngokuqhelekileyo i-coil inxeba malunga nentsimbi yentsimbi, ezinye izindlu zivaliwe), ukuqala kwe-C yi-coil. i-capacitor (i-cylindrical ende, ehlanganiswe ngeplastiki, i-electrolytic capacitors ene-cross indentation, i-flat chip capacitors), enye imilenze emibini i-diodes, imilenze emithathu i-transistors, kunye nemilenze emininzi i-circuits ezidibeneyo.
2, thyristor rectifier UR; Ulawulo lwesekethe inomlungisi wombane weVC; I-UF yokuguqula; Isiguquli se-UC; Inverter UI; Motor M; Asynchronous motor MA; I-synchronous motor MS; Dc motor MD; I-Wund-rotor induction motor MW; I-squirrel cage motor MC; Ivalve yombane iYM; Ivalve ye-Solenoid YV, njl.
3, ufundo olwandisiweyo oluncanyathiselwe inxalenye yomzobo kwibhodi engundoqo yebhodi yesekethe yecandelo lengcaciso yecandelo lengcaciso.
Ixesha lokuposa: Apr-16-2024
