Papa kaapuni paʻi, ʻo ka mea i hoʻohana ʻia i nā PDA (nā mea kōkua pilikino pilikino) e like me nā kelepona paʻalima, maʻalahi i ka hōʻino. 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. ʻO ka hopena, ua puka mai kahi ʻoihana lawelawe e hāʻawi ana i ka hoʻomaʻemaʻe a me ka hoʻoponopono ʻana i nā lawelawe no PCBS i hoʻohaumia ʻia, akā me ka ʻole o ka hōʻino kino ʻana i nā PDA a me nā lako nui.

Cleaning printed circuit boards (PCBS) to repair high-purpose products is as delicate a process as making circuit boards. Inā hoʻohana ʻia ka hana hoʻomaʻemaʻe hewa, hiki iā ia ke hōʻino i nā pilina, hoʻokuʻu i nā mea a me nā mea hōʻino. 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.

He aha kēia mau pahele? How can they be avoided?

Ma lalo, e ʻimi mākou i nā koho hoʻomaʻemaʻe PCB i hōʻoia ʻia a me kekahi āu e makemake ʻole ai e hoʻohana.

Nā ʻano haumia like ʻole

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

Nā mea maloʻo maloʻo (lepo, lepo)

ʻO kekahi o nā kūlana maʻamau ka hōʻiliʻili o ka lepo i loko a puni paha ka PCB. E hoʻohana mālie i kahi palaki liʻiliʻi, lahilahi (e like me kahi kāʻei horsehair pena) e wehe ai i ka lepo me ka ʻole e hoʻopili i nā ʻāpana. There is a limit to where even the smallest brush can reach, such as under the component.

Hiki i ka lewa paʻa ke hiki i nā wahi he nui, akā hiki ke hōʻino i nā pilina koʻikoʻi, no laila e mālama pono i ka wā e hoʻohana ai.

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

Nā hoʻohaumia pulu (lepo, aila waxy, flux, soda)

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. Ināʻole, e loaʻa ka huahana i ka soda lāpala a hoʻopili i nā papa. Either way, these substances should be addressed before they accumulate and affect performance.

Hiki ke hoʻoneʻe ʻia ka hapa nui o nā stains me nā mea hoʻomaʻemaʻe, e like me ka waiʻona isopropyl (IPA) a me nā ʻōlelo aʻoaʻo q, nā brushes liʻiliʻi a i ʻole ka lole pulupulu maʻemaʻe. E hoʻohana i nā mea hoʻoheheʻe e like me IPA e hoʻomaʻemaʻe i ka PCB wale nō i kahi nohona maikaʻi, ʻoi aku ka maikaʻi i ka hood fume.

Hiki iā ʻoe ke hoʻohana i ka wai deionized ma kahi. 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. Hiki i nā mea holoi ʻokoʻa ke hana me nā ʻano kikoʻī kikoʻī, e like me ka flx a i ʻole ka 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. Inā hiki iā ʻoe, ʻaʻole pono ʻoe e hoʻāʻo i nā hoʻomaʻemaʻe ma nā ʻāpana o ka wā kahiko a i ʻole nā ​​mea hoʻopili e hōʻoia ʻaʻole ʻoe e hana nui i ka hōʻino.

Ke hoʻomaʻemaʻe PCB Ultrasonic

ʻO ka hoʻohana ʻana o ka mīkini hoʻomaʻemaʻe ultrasonic kiʻekiʻe pinepine i ka cavitation. ʻO ka hoʻokomo ikaika ʻana o nā piliona mau ʻāpana liʻiliʻi i ka hopena hoʻomaʻemaʻe i loko o ka pahu hoʻomaʻemaʻe ultrasonic. Hoʻokumu ʻia nā huʻa e kahi transducer i hoʻopili ʻia i ka lalo o ka pahu wai a pīhoihoi ka mea hana i kahi alapine ultrasound. ʻO ka hū ʻana o kēia mau huʻa e puhi ʻia e nā mea haumia mai ka ʻili maʻemaʻe o nā ʻāpana.

Hiki ke hoʻohālikelike ʻia ʻo Ultrasound e like me nā nalu kani nona nā alapine i luna o ka palena kiʻekiʻe o ka laulā maʻamau o ka lohe kanaka, ʻo ia hoʻi, ma kahi o 20 kHz (20 kHz no kekona a i ʻole 20,000 pōʻaiapuni). ʻOiaʻiʻo, hiki ke lohe ʻia ke kani o ka mea hoʻomaʻemaʻe ultrasound i ka wā o ka hana ma muli o ka hopena o ka mea a mākou e kapa nei he ultrasonical cavitation.

Lilo ke kiʻina i kekahi o kāna mau mea maikaʻi ma ke ʻano he hoʻomaʻemaʻe no ka mea hiki iā ia ke kumu i nā hōʻino a i ʻole nā ​​pilina paʻa a me ka lepo a me ka lepo. I ka ʻoiaʻiʻo, ua hoʻopuka ʻo NASA i kahi kauoha e hoʻohana ʻole i ka hoʻomaʻemaʻe ultrasonic no ka mea hiki ke kumu ʻole i ka hopena o nā ʻāpana hopena e hoʻokaʻawale a hōʻino maoli i nā kaula hoʻopaʻa i loko o ka IC a me ka hoʻoiho ultrasonic o ka ikehu pad pad wire ma o ka papa alakaʻi IC.

I ka ʻōlelo ʻana i kēlā, aia nō kahi mau wahi kahi e hiki ai ke hoʻohana i ka hoʻomaʻemaʻe ultrasonic. Hiki i ke kaʻina hana hoʻomaʻemaʻe kani ultrasonic ke hōʻea i nā wahi paʻakikī loa, paʻakikī e hiki ai ma lalo o ka hālāwai kiʻekiʻe kiʻekiʻe ma ka hapa nui o ka papa kaapuni. ʻAʻole kēia ka hihia no nā pono SMD me nā hakahaka liʻiliʻi i ʻoi aku ka liʻiliʻi ma mua o ka coefficient hoʻopilikia o ka wai o ka hoʻomaʻemaʻe. Eia naʻe, wikiwiki ka hana, a nui nā mīkini kiʻekiʻe hiki ke lawelawe i ka nui o ka hoʻomaʻemaʻe.

Mīkini hoʻomaʻemaʻe ultrasound PCB

ʻAʻole kahi hana akahai ʻo Cavitation. Ua helu ʻia ʻo nā mahana ma mua o 10,000 ° F a me nā kaomi ma mua o 10,000 PSI e hoʻoulu ʻia ma ka wahi pohā o nā ʻōpala cavitation.

Hiki i nā mea hoʻomaʻemaʻe ultrasonic ke hana i nā alapine mai 25 kHz a i 100+ kHz, i ana ʻia i nā pōʻaiapuni no kekona. Hana nā alapine haʻahaʻa i nā huʻa nui o ka cavitation ke hoʻohālikelike ʻia i nā alapine kiʻekiʻe. Poha ikaika aʻe nā hua nui, no ka laʻana e hoʻoneʻe i nā mea haumia āpau mai nā ʻāpana metala i hana ʻia. Hana nā alapine kiʻekiʻe i nā huʻupuʻu liʻiliʻi, e hoʻomaʻemaʻe ana i ka huʻa akā hiki ke komo i loko o nā māwae, nā āpau a me nā lua makapō. Hoʻohana ʻia nā alapine ʻoi aku ka kiʻekiʻe e hoʻomaʻemaʻe a i ʻole nā ​​palupalu.

ka hopena

Aia kekahi mau ʻoihana i loea i ka hoʻomaʻemaʻe PCB. Aia i kāu mau pono (e like me ka nui o nā papa, he aha nā mea e hoʻomaʻemaʻe ai, a pehea e palupalu ai nā papa), e nānā paha ʻoe i ke kumuwaiwai kūwaho kūpono e kū ai i kāu mau hoʻomaʻemaʻe.

Inā loaʻa pinepine ʻoe i nā pilikia me nā papa e pono ai ka hoʻomaʻemaʻe, aia paha he mau mea ʻoi aku ka nui e nānā i ka wā o ka hoʻolālā a i ʻole ke kaʻina hana.

ʻAʻole pono ka hoʻomaʻemaʻe PCBS i hana nui. ʻO ka mālama ʻana i nā ʻōlelo aʻoaʻo a me nā manaʻo ma luna e kōkua ana i ka hoʻomaʻemaʻe pono ʻana o ka hoʻomaʻemaʻe.