Mbadamba circuit, ọkachasị ndị ejiri na PDA (ndị enyemaka dijitalụ nkeonwe) dị ka ekwentị, na -adị mfe mmegbu. 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. N’ihi nke a, ụlọ ọrụ na -ahụ maka ọrụ apụtala nke na -enye ọrụ nhicha na nrụzi maka PCBS mmetọ, mana na -enweghị mmebi anụ ahụ na PDA na nnukwu akụrụngwa.

Cleaning printed circuit boards (PCBS) to repair high-purpose products is as delicate a process as making circuit boards. Ọ bụrụ na ejiri usoro nhicha na -ezighi ezi, ọ nwere ike imebi njikọ, mebie ihe na ihe mebiri emebi. Iji zere ntụpọ ndị a, ịkwesịrị ịkpachapụ anya na ịhọrọ usoro nhicha nke ọma dịka ị na -eme n’ichepụta, ịkọwapụta na imepụta bọọdụ.

Gịnị bụ ọnyà ndị a? Olee otú a ga -esi zere ha?

N’okpuru, anyị ga -enyocha nhọrọ nhicha PCB egosipụtara yana ụfọdụ nke ị nwere ike ị gaghị achọ iji.

Ụdị mmetọ dị iche iche

Ụdị mmetọ niile nwere ike ịkpakọba na PCBS. Using the right response to an annoying problem will be more effective and will reduce headaches.

Mkpọsa na -akpọ nkụ (uzuzu, unyi)

Otu n’ime ọnọdụ a na -ahụkarị bụ na uzuzu na -agbakọba ma ọ bụ gburugburu PCB. Jiri nwayọ jiri obere ahịhịa siri ike (dị ka ahịhịa na -agba ịnyịnya) iji wepu uzuzu na -enweghị ihe metụtara ya. Enwere oke ebe ọbụladị obere ahịhịa nwere ike iru, dịka n’okpuru ihe mejupụtara ya.

Igwe ikuku nwere ike iru ọtụtụ mpaghara, mana ọ nwere ike imebi njikọ dị mkpa, yabụ ekwesịrị ịkpachara anya mgbe ị na -eji ya.

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

Ihe mmetọ mmiri (unyi, mmanụ waxy, flux, soda)

Ịrụ ọrụ oke okpomọkụ nwere ike gbanwee ụfọdụ ihe kpuchiri ajị anụ ka ọ bụrụ ndọta maka uzuzu na unyi, na-ebute ntụpọ nke na-enweghị ike iji ahịhịa ma ọ bụ ihe nhicha ọkụ wepụ ya. Ma ọ bụghị ya, ngwaahịa a ga -enweta soda na -arapara wee mebie mbadamba ahụ. Either way, these substances should be addressed before they accumulate and affect performance.

Enwere ike wepu ọtụtụ ntụpọ site na ndị na-ehicha ihe, dị ka mmanya isopropyl (IPA) na ndụmọdụ q, obere brushes ma ọ bụ akwa owu dị ọcha. Jiri ihe mgbaze dị ka IPA iji hichaa PCB naanị na ebe ikuku na-adị mma, ọkacha mma na mkpuchi anwụrụ.

Ị nwere ike iji mmiri deionized kama. 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. Ndị na -ehicha ihe dị iche iche nwere ike ịnagide ụdị mmetọ ụfọdụ, dị ka mmụba ma ọ bụ 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. Ọ bụrụ na ị nwere ike, ịkwesighi ịnwale ndị na -ehicha ihe na ihe ochie ma ọ bụ njikọ iji hụ na ị mebighị nnukwu ihe.

Ultrasonic PCB nhicha

Ojiji nke igwe nhicha ultrasonic dị elu na -ebute cavitation. Mkpesa ime ihe ike nke ijeri obere afụ na nhicha nhicha dị na tankị nhicha ultrasonic. A na -emepụta afụ site na transducer agbakwunyere na ala nke tank ahụ ma na -enwe obi ụtọ site na generator na ultrasonic ugboro. Mgbapu nke afụ ndị a ga -efepụ site na mmetọ site n’akụkụ dị ọcha nke akụkụ ahụ.

Enwere ike kọwaa ultrasound dị ka ebili mmiri ụda nke ugboro ugboro ya karịrị oke nke ntị mmadụ, ya bụ, ihe dịka 20 kHz (20 kHz kwa nkeji ma ọ bụ okirikiri 20,000). N’ezie, enwere ike ịnụ ụda nke ihe nhicha ultrasonic n’oge ọrụ n’ihi nsonaazụ nke ihe anyị na -akpọ cavitation ultrasonic.

Usoro a tụfuru ụfọdụ uru ya dị ka ụzọ nhicha n’ihi na ọ nwere ike bute mmebi akụrụngwa ma ọ bụ njikọ rụrụ arụ yana uzuzu na unyi. N’eziokwu, NASA enyela iwu ka ị ghara iji nhicha ultrasonic n’ihi na ọ nwere ike ịkpata okpu ngwụcha nke akụkụ wee mebie ma mebie njikọ njikọta n’ime IC yana mmezi ultrasonic nke ike mpe akwa waya site na etiti IC.

N’ikwu nke ahụ, a ka nwere ebe enwere ike iji nhicha ultrasonic. Usoro nhicha nke ultrasonic nwere ike iru ebe kacha sie ike, nke siri ike iru n’okpuru mgbakọ njupụta dị elu n’ọtụtụ akụkụ nke bọọdụ sekit. Nke a abụghị okwu maka akụrụngwa SMD nwere obere oghere dị ntakịrị karịa oke nrụrụ elu nke mmiri nhicha. Agbanyeghị, usoro a na-eme ngwa ngwa, na enwere ọtụtụ igwe nwere oke nwere ike ijikwa oke nhicha.

Igwe nhicha ultrasonic PCB

Cavitation abụghị usoro dị nro. A gbakọọla na a ga -ewepụta ọnọdụ okpomọkụ karịrị 10,000 Celsius F na nrụgide gafere 10,000 PSI na ebe ntiwapụ nke oghere cavitation.

Ndị nchacha ultrasonic nwere ike wepụta ugboro ole sitere na 25 kHz ruo 100+ kHz, tụọ ya na okirikiri kwa sekọnd. Ugbo ala dị ala na -emepụta afụ cavitation buru ibu ma e jiri ya tụnyere ụda dị elu. Nnukwu afụka gbawara n’ike, dịka ọmụmaatụ iji wepu nsị niile site na akụkụ igwe arụpụtara. Ugboro ugboro dị elu na -emepụta afụ pere mpe, na -eme ka nhicha nhicha dị nro mana ọ na -enwe ike ịbanye na mgbawa, oghere na oghere kpuru ìsì. A na -eji ugboro ugboro dị elu hichaa elu ndị na -egbu maramara ma ọ bụ na -emebi emebi.

ọgwụgwụ

Enwere ụlọ ọrụ ọkachamara na nhicha PCB. Dabere na mkpa gị (dị ka ọnụ ọgụgụ buru ibu, ihe ọ dị mkpa ka a hichaa, yana etu osisi si emebi emebi), ị nwere ike chọọ isi mmalite dị mma iji gboo mkpa nhicha gị.

Ọ bụrụ na ị na -enwekarị nsogbu na bọọdụ chọrọ nhicha, enwere ike bụrụ ihe ndị ka mkpa ịlele n’oge nhazi ma ọ bụ n’ichepụta ihe.

Ihicha PCBS ekwesịghị ịbụ nnukwu ọrụ. Idebe ndụmọdụ na aro ndị dị n’elu ga -enyere aka hụ na emechara nhicha nke ọma.