Ephrintiwe wesifunda ibhodi, ikakhulukazi lawo asetshenziswa kuma-PDAs (personal assistants digital) njengamaselula, asengozini yokuhlukunyezwa. 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. Ngenxa yalokhu, sekuvele imboni yezinsizakalo enikezela ngezinsizakalo zokuhlanza nokulungisa ama-PCBS angcolile, kepha ngaphandle kokulimala emzimbeni kuma-PDA nemishini emikhulu.

Cleaning printed circuit boards (PCBS) to repair high-purpose products is as delicate a process as making circuit boards. Uma kusetshenziswa indlela yokuhlanza engalungile, kungalimaza ukuxhumana, kukhulule izingxenye nokulimaza izinto zokwakha. Ukugwema la maphutha, udinga ukunakekela okungako ekukhetheni indlela efanele yokuhlanza njengoba wenza ekwakheni, ekucaciseni nasekukhiqizeni amabhodi.

Ziyini lezi zingibe? Zingagwenywa kanjani?

Ngezansi, sizohlola izinketho zokuhlanza ze-PCB ezifakazelwe nezinye ongase ungafuni ukuzisebenzisa.

Izinhlobo ezahlukene zokungcola

Zonke izinhlobo zokungcola zinganqwabelana ku-PCBS. Using the right response to an annoying problem will be more effective and will reduce headaches.

Okungcolisayo okomile (uthuli, ukungcola)

Esinye sezimo ezivame kakhulu ukuthi uthuli luhlangana ngaphakathi noma ezungeze i-PCB. Sebenzisa ngobumnene ibhulashi elincane, elibucayi (njengebhulashi lokupenda lehhashi) ukususa uthuli ngaphandle kokuthinta izingxenye. Kunomkhawulo lapho ibhulashi elincane kakhulu lingafinyelela khona, njengaphansi kwengxenye.

Umoya ocindezelweyo ungafinyelela ezindaweni eziningi, kepha ungalimaza ukuxhumana okubalulekile, ngakho-ke kufanele unakekelwe lapho uwusebenzisa.

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

Ukungcola okumanzi (ukungcola, uwoyela omuncu, ukugeleza, isoda)

Ukusebenza kokushisa okuphezulu kungaguqula izinto ezithile ezifakwe i-wax zibe ngomazibuthe bothuli nokungcola, okuholela ekunciphiseni okunamathelayo okungasuswa nge-brush noma i-vacuum cleaner. Ngaphandle kwalokho, umkhiqizo uzothola isoda enamathelayo futhi ungcolise amabhodi. Either way, these substances should be addressed before they accumulate and affect performance.

Amabala amaningi angasuswa ngezihlanzisi, njenge-isopropyl alcohol (IPA) kanye nezeluleko ze-q, amabhulashi amancane noma indwangu kakotini ehlanzekile. Sebenzisa izincibilikisi ezifana ne-IPA ukuhlanza i-PCB kuphela endaweni enomoya ongcono, okungcono kufood hood.

Ungasebenzisa amanzi akhethiwe esikhundleni salokho. 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. Abahlanzi abahlukahlukene bangabhekana nezinhlobo ezithile zokungcola, njengokufuduka noma i-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. Uma ukwazi, awudingi ukuhlola abahlanzayo kuzinto ezindala noma izixhumi ukuze uqiniseke ukuthi awenzi umonakalo omkhulu.

Ukuhlanzwa kwe-Ultrasonic PCB

Ukusetshenziswa komshini wokuhlanza imvamisa ephezulu kubanga i-cavitation. Ukufakwa okunodlame kwezigidigidi zamabhamuza amancane kusisombululo sokuhlanza esiku-tank yokuhlanza ye-ultrasonic. Amabhamuza akhiqizwa i-transducer enamathiselwe phansi kwethangi futhi ajabule yi-generator kumvamisa we-ultrasonic. Ukuqhuma kwalezi zigubhu kuzoshaywa ngumoya okungcolisayo okuvela ebusweni obuhlanzekile bezingxenye.

I-Ultrasound ingachazwa njengamagagasi omsindo amaza ayo angaphezulu komkhawulo ongaphezulu wobubanzi obujwayelekile bokuzwa komuntu, okungukuthi, cishe ama-20 kHz (20 kHz ngomzuzwana noma ngemijikelezo engama-20,000). Ngempela, umsindo we-ultrasonic cleaner ungezwakala ngesikhathi sokusebenza ngenxa yomphumela walokho esikubiza nge-ultrasonic cavitation.

Le ndlela ilahlekelwa ezinye zezinzuzo zayo njengendlela yokuhlanza ngoba ingadala ukulimala kwengxenye noma ukuxhumana okuxekethile kanye nothuli nokungcola. Eqinisweni, i-NASA ikhiphe isiyalezo sokuthi kungasetshenziswa ukuhlanzwa kwe-ultrasonic ngoba kungahle kungahlosile ukuthi izimbangela zokuphela kwamakhompiyutha zihlukanise futhi empeleni zilimaze izintambo zokubopha ngaphakathi kwe-IC kanye nokuqhutshwa kwe-ultrasonic kwensimbi yokubopha intambo yamandla ngohlaka lokuhola lwe-IC.

Uma ukusho lokho, kusenezindawo lapho kungasetshenziswa ukuhlanzwa kwe-ultrasonic. Inqubo yokuhlanza i-ultrasonic ingafinyelela ezindaweni ezinzima kakhulu, okunzima ukufinyelela kuzo ngaphansi komhlangano wokuminyana okukhulu ezingxenyeni eziningi zebhodi lesifunda. Lokhu akunjalo ngemishini ye-SMD enezikhala ezincane ezincane kune-coefficient ebusweni bomoya woketshezi lokuhlanza. Kodwa-ke, inqubo iyashesha, futhi kunemishini eminingi enevolumu ephezulu ekwazi ukuphatha inani elikhulu lokuhlanza.

Umshini wokuhlanza we-PCB ultrasonic

I-Cavitation akuyona inqubo emnene. Kubalwe ukuthi amazinga okushisa angaphezu kuka-10,000 ° F nezingcindezi ezingaphezu kuka-10,000 PSI kuzokwenziwa endaweni eqhumayo yamabhamuza e-cavitation.

Ama-Ultrasonic cleaners angakhiqiza amaza asukela ku-25 kHz kuye ku-100 + kHz, kulinganiswa ngemijikelezo ngomzuzwana. Amaza aphansi akhiqiza amabhamuza amakhulu we-cavitation ngokuqhathaniswa namafrikhwensi aphezulu. Amabhamuza amakhulu aqhuma kakhulu, ngokwesibonelo ukususa ukungcola okuphelele ezingxenyeni zensimbi ezenziwe. Amaza aphakeme akhiqiza amabhamuza amancane, enza ukuthi i-bubble yokuhlanza ibe mnene kepha ikwazi ukungena ekuqhekekeni, emifantwini nasemigodini engaboni. Ama-frequency aphezulu asetshenziselwa ukuhlanza izindawo ezipholishwe kakhulu noma ezintekenteke.

isiphetho

Kunezinkampani ezisebenza ngokuhlanza i-PCB. Ngokuya ngezidingo zakho (njengenani elikhulu lamapulangwe, yini okudingeka ihlanzwe, nokuthi amapulangwe abuthaka kanjani), ungabheka umthombo wangaphandle ofanele ukuhlangabezana nezidingo zakho zokuhlanza.

Uma uvame ukuba nezinkinga ngamabhodi adinga ukuhlanzwa, kungenzeka ukuthi kunezinto ezibaluleke kakhulu ongazihlola ngesikhathi sokwakhiwa noma senqubo yokukhiqiza.

Ukuhlanza i-PCBS akudingeki kube umsebenzi owesabekayo. Ukugcina amathiphu neziphakamiso ezingenhla engqondweni kuzosiza ukuqinisekisa ukuthi ukuhlanzwa kwenziwa ngendlela efanele.