Lolomi laupapa matagaluega, aemaise i latou e faʻaaogaina i PDA (tagata lava ia fesoasoani numera) pei o telefoni feʻaveaʻi, e faigofie ona faʻasaua. In addition to collecting dust that can seep into the case of a phone, PCBS are also prone to soaking in or splashing out of liquids during daily use on e-book readers and similar handheld devices. O lona iʻuga, ua aliaʻe mai se kamupani tautua e tuʻuina atu le faʻamamaina ma le toe faʻaleleia o tautua mo PCBS faʻaleagaina, ae aunoa ma le faʻaleagaina o tino i PDA ma masini tetele.

Cleaning printed circuit boards (PCBS) to repair high-purpose products is as delicate a process as making circuit boards. Afai e sese le faʻamamaina metotia e faʻaaogaina, e mafai ona faʻaleagaina fesoʻotaʻiga, faʻamama vaega ma faʻaleagaina mea. To avoid these defects, you need to take as much care in choosing the right cleaning method as you do in designing, specifying, and manufacturing boards.

O a ia mailei? How can they be avoided?

Lalo, o le a matou suʻesuʻe faʻamaonia filifiliga faʻamamaina PCB ma nisi e te ono le manaʻo e faʻaaoga.

Eseese ituaiga o mea filogia

All kinds of pollutants can accumulate on PCBS. Using the right response to an annoying problem will be more effective and will reduce headaches.

Faʻamago mamago (pefu, palapala)

O se tasi o tulaga sili ona taatele o le efuefu faaputuputu i totonu pe latalata i le PCB. Faʻaaoga lemu se pulumu laititi maaleale (pei o se solofanua vali solofanua) e aveʻese ai le pefu e aunoa ma le afaina ai vaega. There is a limit to where even the smallest brush can reach, such as under the component.

E mafai ona oʻo atu le ea faʻapipiʻi ile tele o vaega, ae mafai ona faʻaleagaina ai fesoʻotaʻiga taua, o lea e tatau ai ona faʻaeteete pe a faʻaaogaina.

A specially designed vacuum cleaner for electronic components is also an option, but it is ubiquitous.

Faʻasusu palapala (palapala, gaʻo o le suauʻu, faʻasologa, vai inu)

High-temperature operations can turn certain wax-coated components into magnets for dust and dirt, resulting in sticky grime that can’t be removed with a brush or vacuum cleaner. A leai, o le oloa o le a maua le pipii soda ma faʻaleagaina le laupapa. Either way, these substances should be addressed before they accumulate and affect performance.

Tele stains mafai ona aveʻesea ma cleaners, e pei o isopropyl ava malosi (IPA) ma q-fesoasoani, laʻititi pulumu poʻo mama vavae ie. Faʻaoga solvents pei o le IPA e faʻamama le PCB naʻo totonu o se siʻosiʻomaga lelei-ventilated, sili i se fume hood.

You can use deionized water instead. Be sure to remove excess moisture and dry the plate properly (a few hours in a low oven will help remove any remaining moisture.)

In addition to IPA, there are many commercially available PCB cleaners, ranging from acetone to chemicals used to clean electronic equipment. Eseese mea faʻamama e mafai ona feagai ma ituaiga faʻapitoa o faʻaleagaina, pei ole flx poʻo le wax. Keep in mind that harsh cleaners can remove marks from components or damage plastic or electrolytic capacitor jackets or other exotic components (such as humidity sensors), so make sure that the cleaner you use is not too strong. Afai e te mafaia, oe le manaʻomia le faʻataʻitaʻia o mea fufulu i luga o matutua vaega poʻo fesoʻotaʻiga ia mautinoa e te le o faia tele faʻaleagaina.

O le faʻamamaina ole Ultrasonic PCB

The use of high frequency ultrasonic cleaning machine causes cavitation. O le vevesi faʻatupuina o piliona o tamaʻi fugalaʻau i le faʻamamaina fofo o loʻo i totonu o le ultrasonic cleaner tank. The bubbles are generated by a transducer attached to the bottom of the tank and are excited by the generator at an ultrasonic frequency. O le paina o nei puta o le a lelea ese e mea faʻaleagaina mai luga mama o vaega.

E mafai ona faʻauigaina le ultrasound o ni galu leo ​​o loʻo i ai i luga atu o le pito i luga o laina masani ole faʻalogo a tagata, ala ile 20 kHz (20 kHz ile sekone poʻo le 20,000 taamilosaga). E moni lava, o le leo o le fuamoa ultrasonic e mafai ona lagonaina i le taimi o gaioiga ona o le aʻafiaga o le mea tatou te taʻua o le ultrasonic cavitation.

O le metotia na leiloa nisi o ona lelei o se metotia faʻamamaina aua e mafai ona mafua ai vaega faʻaleagaina poʻo matala fesoʻotaʻiga faʻapea foi ma le pefu ma palapala. O le mea moni, ua faʻasalalau e le NASA le faʻatonuga e aua neʻi faʻaaogaina le faʻamamaina o le ultrasonic aua e ono tupu ai ma le le fuafuaina le faʻamutaina o tapuni o vaega e vavae ese ma faʻaleagaina ai uaea faʻafesoʻotaʻi i totonu o le IC ma le faʻatonutonuina o le ultrasonic o le faʻaogaina o le uaea pad pad e ala i le IC lead frame.

I le faia o lena tala, o loʻo i ai lava nofoaga e mafai ona faʻaaogaina ai le faʻamamaina o le ultrasonic. Ole faiga ole faʻamamaina ole ultrasonic e mafai ona oʻo atu ile nofoaga sili ona faigata ma faigata ona maua i lalo ole faʻapotopotoga maualuga ile tele o vaega ole laupapa matagaluega. E le o le tulaga lea mo mea faigaluega SMD ma tamaʻi va e laʻititi nai lo le mea e faʻaaogaina ai le faʻamamaina o le vai. Ae ui i lea, o le gaioiga e vave, ma e tele masini maualuga-voluma e mafai ona faʻatautaia tele aofaʻiga o le faʻamamaina.

Masini faʻamama ultrason PCB

Cavitation e le o se agamalu gaioiga. Ua fuafuaina o le vevela i le sili atu ma le 10,000 ° F ma le mamafa faʻatosina sili atu i le 10,000 PSI o le a faia i le nofoaga pa o le cavitation puta.

E mafai ona faʻamamaina e le au faʻamama eletise mai le 25 kHz e oʻo atu i le 100+ kHz, fuaina i taʻamilosaga ile sekone. Maualalo alualu i luma gaosia lapopoʻa cavitation puta faʻatusatusa i maualuga maualuga. O lapopoʻa lapopoa na pa pa faʻasau, mo se faʻataʻitaʻiga e aveʻesea uma mea faʻaleagaina mai vaega gaosi uʻamea. Ole maualuga o alaleo e maua ai tamaʻi fula, faʻamama atili ai le faʻamamaina ole lapalapa ae e mafai ona ofi atu i taʻetaʻei, alavai ma pupu tauaso. E faʻaaogaina le maualuga o ala e faʻamama ai luga poʻo luga ole lauulu.

faaiuga

E i ai kamupani faʻapitoa i le PCB faʻamama. Faʻamoemoeina i ou manaʻoga (pei o le tele o laupapa, o a mea e manaʻomia ona faʻamamaina, ma pe o le a le leaga o laupapa), oe ono vaʻai mo le sao i fafo atu o mea e faʻafetaui ai ou manaʻoga manaʻoga.

Afai e masani ona i ai ou faʻafitauli ma laupapa e manaʻomia le faʻamamaina, atonu e sili atu mea taua e siaki i le taimi o le tisaini poʻo gaosiga gaioiga.

Ole faʻamamaina ole PCBS e le tatau ona avea ma galuega faigata. O le teuina i luga o fautuaga ma fautuaga i luga, o le a fesoasoani e faʻamautinoa o loʻo faʻamamaina le faia saʻo.