I-9 ingqiqo eqhelekileyo yePCB umzi-mvelisouhlolo lwebhodi yesekethe yaziswa ngolu hlobo lulandelayo:
1. Akuvumelekanga ngokungqongqo ukusebenzisa izixhobo zovavanyo ezisekelwe phantsi ukuze uchukumise iTV ephilayo, i-audio, ividiyo kunye nezinye izixhobo zeplate ephantsi ukuvavanya ibhodi ye-PCB ngaphandle kwe-transformer yodwa.
Akuvumelekanga ngokungqongqo ukuvavanya ngokuthe ngqo i-TV, i-audio, ividiyo kunye nezinye izixhobo ngaphandle kwe-transformer yokuzimela yodwa kunye nezixhobo kunye nezixhobo ezineendawo ezivaliweyo.Nangona irekhoda yekhasethi yerediyo ngokubanzi inesiguquli samandla, xa udibana neTV ekhethekileyo okanye izixhobo ezivakalayo, ngakumbi amandla aphumayo okanye ubume bombane osetyenziswayo, kufuneka uqale ufumanise ukuba i-chassis yomatshini ihlawuliswa. , Ngaphandle koko kuya kuba lula kakhulu I-TV, i-audio kunye nezinye izixhobo ezihlawuliswa ngeplate ephantsi zibangela isiphaluka esifutshane sonikezelo lwamandla, oluchaphazela umjikelezo odibeneyo, obangela ukwanda okuqhubekayo kwesiphoso.
2. Nika ingqalelo ekusebenzeni kwe-insulation yentsimbi ye-soldering xa uvavanya ibhodi ye-PCB
Akuvumelekanga ukusebenzisa intsimbi yokuxubha ukudibanisa ngamandla.Qinisekisa ukuba i-iron ye-soldering ayihlawuliswa.Gqiba iqokobhe lentsimbi yokuthambisa.Qaphela ngesekethe ye-MOS.Kukhuselekile ukusebenzisa i-low-voltage circuit iron ye-6 ~ 8V.
3. Ngaphambi kokuvavanya ibhodi yePCB, qonda umgaqo wokusebenza weesekethe ezidibeneyo kunye neesekethe ezinxulumene nazo
Ngaphambi kokuba uhlole kwaye ulungise isekethe edibeneyo, kufuneka uqale uqhelane nomsebenzi wesekethe edibeneyo esetyenzisiweyo, isekethe yangaphakathi, iiparamitha eziphambili zombane, indima yephini nganye, kunye nombane oqhelekileyo wephini, i-waveform kunye nokusebenza. umgaqo wesekethe eyenziwe ngamacandelo eperipheral.Ukuba le miqathango ingentla idibene, ukuhlalutya kunye nokuhlolwa kuya kuba lula kakhulu.
4. Musa ukwenza isekethe emfutshane phakathi kwezikhonkwane xa uvavanya ibhodi yePCB
Xa ulinganisa i-voltage okanye uvavanya iifom zamaza nge-oscilloscope probe, musa ukubanga isekethe emfutshane phakathi kwezikhonkwane zesekethe edibeneyo ngenxa yokutyibilika kovavanyo olukhokelela kuvavanyo okanye iiprobes, kwaye ulinganise kumjikelo oprintiweyo wesekethe eqhagamshelwe ngokuthe ngqo kwizikhonkwane.Naliphi na isiphaluka esifutshane somzuzwana singonakalisa ngokulula isiphaluka esidibeneyo.Kuya kufuneka ulumke ngakumbi xa uvavanya iisekethe ezidibeneyo zeCMOS.
5. Ukuchasana kwangaphakathi kwesixhobo sokuvavanya ibhodi yePCB kufuneka kube kukhulu
Xa ulinganisa umbane we-DC wezikhonkwane ze-IC, i-multimeter kunye nokuchasana kwangaphakathi kwentloko yemitha enkulu kune-20KΩ / V kufuneka isetyenziswe, ngaphandle koko kuya kubakho impazamo enkulu yokulinganisa umbane wezinye izikhonkwane.
6. Nika ingqalelo ukutshatyalaliswa kobushushu bombane odibeneyo wesekethe xa uvavanya ibhodi yePCB
Umbane odibeneyo wesiphaluka kufuneka ube nokutshatyalaliswa kobushushu obuhle, kwaye akuvumelekanga ukusebenza kwindawo ephezulu yamandla ngaphandle kokushisa ubushushu.
7. Ucingo olukhokelayo lwebhodi yePCB kufuneka luvavanywe ngokufanelekileyo
Ukuba ufuna ukongeza amacandelo angaphandle ukutshintsha iindawo ezonakalisiweyo zesekethe edibeneyo, kufuneka kukhethwe amacandelo amancinci, kwaye i-wiring kufuneka ibe nengqiqo ukuphepha ukudibanisa okungafunekiyo kwe-parasitic, ngakumbi ukusekwa phakathi kwesiphaluka esidibeneyo somsindo we-amplifier kunye ne-preamplifier circuit circuit. .
8. Ukuhlola ibhodi PCB ukuqinisekisa umgangatho welding
Xa ukuthengiswa, i-solder iqinile, kwaye ukuqokelela kwe-solder kunye neepores kunokubangela ukuba i-solder yobuxoki.Ixesha le-soldering ngokuqhelekileyo alikho ngaphezu kwemizuzwana ye-3, kwaye amandla entsimbi ye-solder kufuneka ibe malunga ne-25W ngokufudumeza kwangaphakathi.Isekethe edibeneyo ethe yathengiswa kufuneka ihlolwe ngokucophelela.Sebenzisa i-ohmmeter ukulinganisa ukuba kukho isiphaluka esifutshane phakathi kwezikhonkwane, qinisekisa ukuba akukho ukunamathela kwi-solder, uze uvule amandla.
9. Musa ukugweba umonakalo wesekethe edibeneyo ngokulula xa uvavanyaibhodi PCB
Musa ukugweba ukuba isiphaluka esidibeneyo sonakaliswe ngokulula.Ngenxa yokuba uninzi lweesekethe ezidityanisiweyo zidityaniswa ngokuthe ngqo, xa isekethe ingaqhelekanga, inokubangela utshintsho lombane oluninzi, kwaye olu tshintsho alubangelwanga ngumonakalo wesekethe edibeneyo.Ukongeza, kwezinye iimeko, i-voltage elinganisiweyo yepini nganye yahlukile kumbane oqhelekileyo.Xa amaxabiso ehambelana okanye esondele, ayinakuhlala ibonisa ukuba isekethe edibeneyo ilungile.Ngenxa yokuba ezinye iimpazamo ezithambileyo aziyi kubangela utshintsho kumbane we-DC.
Ikhaya -Malunga neHengxinyi -Umboniso webhodi yesekethe -Iiparamitha zenkqubo -Ukuhamba kwemveliso