{"id":3314,"date":"2025-06-17T08:30:00","date_gmt":"2025-06-17T00:30:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3314"},"modified":"2025-06-16T19:32:30","modified_gmt":"2025-06-16T11:32:30","slug":"what-is-ict","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/","title":{"rendered":"Mik\u00e4 on ICT\uff1f"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Sis\u00e4llysluettelo<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#What_is_ICT_In-Circuit_Test\" >Mik\u00e4 on ICT (In-Circuit Test)?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#ICT_Testing_Functions_Working_Principles\" >Tieto- ja viestint\u00e4tekniikan testaustoiminnot ja ty\u00f6periaatteet<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#Key_Features_of_ICT_Testing\" >Tieto- ja viestint\u00e4tekniikan testauksen t\u00e4rkeimm\u00e4t ominaisuudet<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#How_ICT_Testing_Works\" >Miten ICT-testaus toimii<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#Applications_and_Limitations_of_ICT\" >Tieto- ja viestint\u00e4tekniikan sovellukset ja rajoitukset<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#ICT_Testing_Advantages_Disadvantages\" >ICT-testaus Edut ja haitat<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#Advantages_of_ICT_Testing\" >ICT-testauksen edut<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#Disadvantages_of_ICT_Testing\" >Tieto- ja viestint\u00e4tekniikan testauksen haitat<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#ICT_vs_MDA_vs_ATE_Key_Differences\" >ICT vs. MDA vs. ATE: keskeiset erot<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#Top_ICT_Manufacturers\" >Parhaat ICT-valmistajat<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#ICT_Testing_FAQ\" >ICT-testaus FAQ<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#Q1_What_is_ICT_Testing\" >Q1: Mit\u00e4 on ICT-testaus?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#Q2_What_components_can_ICT_test\" >Kysymys 2: Mit\u00e4 komponentteja ICT voi testata?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#Q3_Why_is_ICT_testing_necessary\" >Kysymys 3: Miksi tieto- ja viestint\u00e4tekniikan testaus on tarpeen?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#Q4_Is_ICT_just_an_advanced_multimeter\" >Q4: Onko ICT vain kehittynyt yleismittari?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#Q5_How_does_ICT_differ_from_AOI\" >Kysymys 5: Miten ICT eroaa AOI:sta?<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-ict\/#Summary\" >Yhteenveto<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_ICT_In-Circuit_Test\"><\/span>Mik\u00e4 on ICT (In-Circuit Test)?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>ICT (In-Circuit Test, Online Testing) on automatisoitu testaustekniikka, jota k\u00e4ytet\u00e4\u00e4n painettujen piirilevyjen (PCBA) tarkastamiseen. Siin\u00e4 k\u00e4ytet\u00e4\u00e4n neulapohjaa tai lent\u00e4vi\u00e4 antureita testipisteiden koskettamiseen, mik\u00e4 mahdollistaa komponenttien juotoslaadun, oikosulkujen, avoimien piirien, virheellisten komponenttien ja s\u00e4hk\u00f6isten parametrien nopean tarkistamisen. ICT-testeri (In-Circuit Tester) on kriittinen PCBA-testauslaite nykyaikaisessa elektroniikkavalmistuksessa, joka parantaa tuotannon tehokkuutta ja v\u00e4hent\u00e4\u00e4 vikam\u00e4\u00e4ri\u00e4. Sit\u00e4 k\u00e4ytet\u00e4\u00e4n laajalti esimerkiksi kulutuselektroniikan, autoelektroniikan ja viestint\u00e4laitteiden alalla.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ICT_Testing_Functions_Working_Principles\"><\/span><strong>Tieto- ja viestint\u00e4tekniikan testaustoiminnot ja ty\u00f6periaatteet<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Key_Features_of_ICT_Testing\"><\/span><strong>Tieto- ja viestint\u00e4tekniikan testauksen t\u00e4rkeimm\u00e4t ominaisuudet<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4><ul class=\"wp-block-list\"><li><strong>Laaja sovellettavuus &amp; korkea tarkkuus<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>Havaitsee viat (aukot, oikosulut, v\u00e4\u00e4r\u00e4t komponentit) selke\u00e4ll\u00e4 vikailmoituksella.<\/li>\n\n<li>Standardoitu testausmenetelm\u00e4, soveltuu k\u00e4ytt\u00e4jille, joilla on tekniset perustaidot.<\/li>\n\n<li>Parantaa tuotannon tehokkuutta ja v\u00e4hent\u00e4\u00e4 kustannuksia<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Kattava komponenttien testaus<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>Testit <strong>PCBA<\/strong> varten:<ul class=\"wp-block-list\"><li>Avoimet\/lyhyt virtapiirit<\/li>\n\n<li>Vastukset, kondensaattorit, diodit, transistorit (FET:t, BJT:t)<\/li>\n\n<li>IC-nastojen todentaminen (TestJet, Connect Check, BIST)<\/li>\n\n<li>Puuttuvat\/v\u00e4\u00e4r\u00e4t komponentit, juotosvirheet, parametripoikkeamat.<\/li><\/ul><\/li>\n\n<li>H\u00e4iri\u00f6t n\u00e4ytet\u00e4\u00e4n n\u00e4yt\u00f6ll\u00e4 tai tulostimella nopeaa vianetsint\u00e4\u00e4 varten.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Edistyneet toiminnot<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>TTL\/OP\/Relay-toiminnallinen testaus<\/li>\n\n<li>IC-ohjelmointi (laiteohjelmiston polttaminen)<\/li><\/ul><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/ICT-test-3.jpg\" alt=\"ICT-testi\" class=\"wp-image-3315\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/ICT-test-3.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/ICT-test-3-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/ICT-test-3-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_ICT_Testing_Works\"><\/span><strong>Miten ICT-testaus toimii<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2><ul class=\"wp-block-list\"><li><strong>Vartiointitekniikka (erist\u00e4minen)<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>K\u00e4ytt\u00e4\u00e4 operaatiovahvistimia kytkettyjen komponenttien erist\u00e4miseen, mik\u00e4 takaa tarkat mittaukset.<\/li>\n\n<li>Kaava: <em>R1 = Vm\/I1<\/em> (R2:n l\u00e4pi kulkeva virta \u2248 0).<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Vastuksen testaus<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Vakiovirtamenetelm\u00e4<\/strong>: Mittaa suuria vastuksia Ohmin lain avulla (<em>R = V\/I<\/em>).<\/li>\n\n<li><strong>Invertoiva vahvistinmenetelm\u00e4<\/strong>: Laskee resistanssin (<em>Rdut = -Vi\u00d7Rf\/Vo<\/em>).<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Kondensaattorin testaus<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li><strong>AC-tila<\/strong>: Mittaa reaktanssia (<em>Xc = 1\/(2\u03c0fC)<\/em>) k\u00e4ytt\u00e4en OPA-vahvistusta (<em>C = -Vo\/(V\u00d7\u03c9\u00d7R)<\/em>).<\/li>\n\n<li><strong>DC-tila (&gt;10\u03bcF)<\/strong>: Lataa kondensaattoreita vakiovirralla; laskee kapasitanssin latausajan avulla.<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Induktorin testaus<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li>Mittaa induktiivisen reaktanssin (<em>XL = 2\u03c0fL<\/em>) OPA:n avulla (<em>L = -V\u00d7R\/(\u03c9\u00d7Vo)<\/em>).<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Diodien\/transistorien testaus<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Diodit<\/strong>: Eteenp\u00e4in suuntautuvan j\u00e4nnitteen tarkistus (Si: ~0.7V, Ge: ~0.3V).<\/li>\n\n<li><strong>Transistorit<\/strong>: Pulssiperustulo; <em>Vce &lt; 0.2V<\/em> osoittaa kyll\u00e4isyytt\u00e4 (l\u00e4p\u00e4isy).<\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Avoin\/lyhyt testaus<\/strong><\/li><\/ul><ul class=\"wp-block-list\"><li><strong>Oppimistila<\/strong>: Luo &#8220;Short Pin Group Table&#8221; (vastus &lt;20\u03a9 = lyhyt).<\/li>\n\n<li><strong>Testitila<\/strong>:<ul class=\"wp-block-list\"><li><strong>Avoin testi<\/strong>: Resistanssi &gt;80\u03a9 = avoin vika.<\/li>\n\n<li><strong>Lyhyt testi<\/strong>: 5\u03a9 ryhmien v\u00e4lill\u00e4 = lyhyt vika.<\/li><\/ul><\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Applications_and_Limitations_of_ICT\"><\/span><strong>Tieto- ja viestint\u00e4tekniikan sovellukset ja rajoitukset<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2><p>ICT:t\u00e4 (In-Circuit Test) k\u00e4ytet\u00e4\u00e4n ensisijaisesti seuraavissa vaiheissa <strong>loppu <a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/surface-mount-technology\/\">SMT<\/a> prosessi<\/strong>tyypillisesti sen j\u00e4lkeen, kun <strong>reflow-juottaminen<\/strong>, jotta piirilevyjen kokoonpanovirheet (kuten oikosulut, aukot tai v\u00e4\u00e4r\u00e4t komponentit) voidaan havaita nopeasti ja SMT-tuotannon tuottoa voidaan seurata reaaliajassa.<\/p><p><strong>T\u00e4rkeimm\u00e4t kohdat:<\/strong><\/p><ul class=\"wp-block-list\"><li><strong>Vaatii mukautettuja kalusteita<\/strong>: Erilaiset tuotteet tarvitsevat erityisi\u00e4 ICT-testauslaitteita, joihin kuuluvat yleisesti seuraavat laitteet <strong>tyhji\u00f6- tai pneumaattiset tyypit<\/strong>, joissa k\u00e4ytet\u00e4\u00e4n koettimia testipisteiden koskettamiseen.<\/li>\n\n<li><strong>Testauksen rajoitukset<\/strong>: Jos PCB-komponentit ovat <strong>liian tihe\u00e4sti pakattu<\/strong>Tieto- ja viestint\u00e4tekniikka voi olla ep\u00e4k\u00e4yt\u00e4nn\u00f6llinen, koska koettimen sijoittamiseen ei ole riitt\u00e4v\u00e4sti tilaa.<\/li><\/ul><p><strong>Toimialat<\/strong>: K\u00e4ytet\u00e4\u00e4n laajalti korkean tarkkuuden PCBA-valmistuksessa, kuten esim. <strong>kulutuselektroniikka, autoelektroniikka ja viestint\u00e4laitteet<\/strong>.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/ICT-test.jpg\" alt=\"\" class=\"wp-image-3316\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/ICT-test.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/ICT-test-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/ICT-test-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ICT_Testing_Advantages_Disadvantages\"><\/span><strong>ICT-testaus Edut ja haitat<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Advantages_of_ICT_Testing\"><\/span><strong>ICT-testauksen edut<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Suuri nopeus &amp; tehokkuus<\/strong><\/p><ul class=\"wp-block-list\"><li>Testit <strong>L\/C\/R\/D komponentit<\/strong> ilman piirilevyn virransy\u00f6tt\u00f6\u00e4 (esim. 300-komponenttinen piirilevy, joka on testattu piirilevyss\u00e4 <strong>3-5 sekuntia<\/strong>).<\/li>\n\n<li>V\u00e4hent\u00e4\u00e4 k\u00e4ynnistysviiveit\u00e4 ja est\u00e4\u00e4 <strong>oikosulkuvahinko<\/strong>.<\/li><\/ul><p><strong>Johdonmukainen &amp; luotettava<\/strong><\/p><ul class=\"wp-block-list\"><li>Tietokoneohjattu tarkkuus minimoi <strong>v\u00e4\u00e4ri\u00e4 ep\u00e4onnistumisia<\/strong> ja havaitsematta j\u00e4\u00e4neet viat.<\/li>\n\n<li>V\u00e4h\u00e4inen riippuvuus k\u00e4ytt\u00e4jist\u00e4 - peruskoulutus riitt\u00e4\u00e4 toimintaan (vaikka <strong>ohjelmointi vaatii insin\u00f6\u00f6rej\u00e4<\/strong>).<\/li><\/ul><p><strong>Kustannustehokkaat korjaukset<\/strong><\/p><ul class=\"wp-block-list\"><li>Pinpoints <strong>vialliset komponentit\/verkot<\/strong>, mik\u00e4 nopeuttaa virheenkorjausta.<\/li>\n\n<li>V\u00e4hent\u00e4\u00e4 <strong>ty\u00f6voimakustannukset<\/strong> helppo vianm\u00e4\u00e4ritys teknikoille.<\/li><\/ul><p><strong>Tehostaa tuotannon tuottoa<\/strong><\/p><ul class=\"wp-block-list\"><li>Reaaliaikainen palaute <strong>SMT-linjat<\/strong> alentaa vikojen m\u00e4\u00e4r\u00e4\u00e4.<\/li>\n\n<li>Parantaa <strong>l\u00e4pimeno<\/strong> ja v\u00e4hent\u00e4\u00e4 romuvarastoa.<\/li><\/ul><p><strong>Kattava laadunvalvonta<\/strong><\/p><ul class=\"wp-block-list\"><li>Testit <strong>kaikki komponentit<\/strong>, mukaan lukien ohituspiirit, mik\u00e4 parantaa lopputuotteen luotettavuutta.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Disadvantages_of_ICT_Testing\"><\/span><strong>Tieto- ja viestint\u00e4tekniikan testauksen haitat<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Korkeat alkukustannukset<\/strong><\/p><ul class=\"wp-block-list\"><li>Laitteet\/kalusteet (esim. pneumaattiset mallit) voivat maksaa. <strong>10 000- 50 000 DOLLARIA+<\/strong>, mik\u00e4 suosii massatuotantoa.<\/li><\/ul><p><strong>Suunnittelun rajoitukset<\/strong><\/p><ul class=\"wp-block-list\"><li>Vaatii <strong>erityiset testipisteet (TP)<\/strong>, mik\u00e4 v\u00e4hent\u00e4\u00e4 piirilevyn asettelun joustavuutta.<\/li><\/ul><p><strong>Yhteystiedot Luotettavuusongelmat<\/strong><\/p><ul class=\"wp-block-list\"><li>Pintak\u00e4sittelyt (esim, <strong>OSP<\/strong>) saattavat tarvita juotospastaa johtavuuden varmistamiseksi, mutta riski <strong>hapettumisen aiheuttamat viat<\/strong>.<\/li><\/ul><p><strong>Huoltovaatimukset<\/strong><\/p><ul class=\"wp-block-list\"><li>Anturit ja kiinnikkeet vaativat <strong>s\u00e4\u00e4nn\u00f6llinen vaihto\/puhdistus<\/strong> tarkkuuden vuoksi.<\/li><\/ul><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ICT_vs_MDA_vs_ATE_Key_Differences\"><\/span><strong>ICT vs. MDA vs. ATE: keskeiset erot<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Testityyppi<\/strong><\/th><th><strong>Valmiudet<\/strong><\/th><th><strong>Esimerkkej\u00e4<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>MDA<\/strong><\/td><td>Basic <strong>L\/C\/R\/D<\/strong> testaus; ei virtal\u00e4hdett\u00e4 (kuten &#8220;automaattinen yleismittari&#8221;)<\/td><td>TRI-518, JET-300<\/td><\/tr><tr><td><strong>TIETO- JA VIESTINT\u00c4TEKNIIKKA<\/strong><\/td><td>Edistynyt: <strong>Itsetestaus, virransy\u00f6tt\u00f6, toimintatarkastukset<\/strong><\/td><td>Agilent 3070, TRI-8100<\/td><\/tr><tr><td><strong>ATE<\/strong><\/td><td><strong>Toiminnallinen testaus p\u00e4\u00e4st\u00e4 p\u00e4\u00e4h\u00e4n<\/strong> vaatii virtal\u00e4hteell\u00e4 varustetun piirilevyn<\/td><td>R\u00e4\u00e4t\u00e4l\u00f6idyt SMT-line-j\u00e4rjestelm\u00e4t<\/td><\/tr><\/tbody><\/table><\/figure><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Top_ICT_Manufacturers\"><\/span><strong>Parhaat ICT-valmistajat<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4><ul class=\"wp-block-list\"><li><strong>Johtavat tuotemerkit<\/strong>: Agilent (Keysight), Teradyne, TRI (Taiwan), GenRad, SPEA.<\/li>\n\n<li><strong>Muut<\/strong>: Hioki (Japani), ADSYS (Taiwan), WINCHY (Kiina), AEROFLEX (Yhdysvallat).<\/li><\/ul><p><em><strong>(Huomautus: Agilent 3070 ja TRI-518 ovat yleisimpi\u00e4 OEM-tehtailla.)<\/strong><\/em><\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/ICT-test-2.jpg\" alt=\"\" class=\"wp-image-3317\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/ICT-test-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/ICT-test-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/ICT-test-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ICT_Testing_FAQ\"><\/span><strong>ICT-testaus FAQ <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Q1_What_is_ICT_Testing\"><\/span><strong>Q1: Mit\u00e4 on ICT-testaus?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4><p><strong>A1<\/strong>: ICT (In-Circuit Test) on automatisoitu tekniikka, jota k\u00e4ytet\u00e4\u00e4n havaitsemaan <strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/products\/category\/pcba\/\">PCBA-kokoonpano<\/a> virheet<\/strong> (oikosulut, avautumiset, v\u00e4\u00e4r\u00e4t komponentit jne.) k\u00e4ytt\u00e4m\u00e4ll\u00e4 testausantureita komponenttien nopeaan tarkistamiseen. <strong>s\u00e4hk\u00f6inen suorituskyky<\/strong> ja juotoslaatu.<\/p><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Q2_What_components_can_ICT_test\"><\/span><strong>Kysymys 2: Mit\u00e4 komponentteja ICT voi testata?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4><p><strong>A2<\/strong>: ICT voi havaita:<\/p><ul class=\"wp-block-list\"><li><strong>Peruskomponentit<\/strong>: Vastukset (R), kondensaattorit (C), induktorit (L), diodit (D).<\/li>\n\n<li><strong>Piirin olosuhteet<\/strong>: Avaa, shortsit<\/li>\n\n<li><strong>IC-suojadiodit<\/strong>jne.<\/li><\/ul><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Q3_Why_is_ICT_testing_necessary\"><\/span><strong>Kysymys 3: Miksi tieto- ja viestint\u00e4tekniikan testaus on tarpeen?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4><p><strong>A3<\/strong>:<\/p><ul class=\"wp-block-list\"><li><strong>Tehokas havaitseminen<\/strong>: Tunnistaa nopeasti yli 90 % kokoonpanovioista (esim. juotosongelmat, puuttuvat osat).<\/li>\n\n<li><strong>Kustannusten v\u00e4hent\u00e4minen<\/strong>: Varhainen vikojen havaitseminen minimoi j\u00e4lkity\u00f6aikaa ja -kuluja.<\/li><\/ul><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Q4_Is_ICT_just_an_advanced_multimeter\"><\/span><strong>Q4: Onko ICT vain kehittynyt yleismittari?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4><p><strong>A4<\/strong>Kyll\u00e4, mutta sill\u00e4 on keskeisi\u00e4 etuja:<\/p><ul class=\"wp-block-list\"><li><strong>Vartiointi (erist\u00e4minen)<\/strong>: Mittaa tarkasti yksitt\u00e4isi\u00e4 komponentteja piirin sis\u00e4ll\u00e4 ilman signaalih\u00e4iri\u00f6it\u00e4.<\/li>\n\n<li><strong>Er\u00e4testaus<\/strong>: Tarkistaa samanaikaisesti useita piirilevykomponentteja testilaitteen avulla.<\/li><\/ul><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Q5_How_does_ICT_differ_from_AOI\"><\/span><strong>Kysymys 5: Miten ICT eroaa AOI:sta?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4><p><strong>A5<\/strong>:<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Testityyppi<\/strong><\/th><th><strong>Menetelm\u00e4<\/strong><\/th><th><strong>Vahvuudet<\/strong><\/th><th><strong>Paras<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>TIETO- JA VIESTINT\u00c4TEKNIIKKA<\/strong><\/td><td>S\u00e4hk\u00f6inen testaus<\/td><td>havaitsee toiminnalliset viat (avautuu, parametrivirheet)<\/td><td>S\u00e4hk\u00f6inen validointi<\/td><\/tr><tr><td><strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-aoi-automated-optical-inspection\/\">AOI<\/a><\/strong><\/td><td>Optinen tarkastus<\/td><td>Tunnistaa visuaaliset viat (virheasennot, puuttuvat juotokset).<\/td><td>Ulkon\u00e4\u00f6n tarkastukset<\/td><\/tr><\/tbody><\/table><\/figure><ul class=\"wp-block-list\"><li><strong>Suositeltu ty\u00f6nkulku<\/strong>: AOI (visuaalinen) \u2192 ICT (s\u00e4hk\u00f6inen).<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Summary\"><\/span><strong>Yhteenveto<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2><p>ICT (In-Circuit Test) on PCBA-valmistuksen kriittinen automatisoitu testaustekniikka, joka mahdollistaa s\u00e4hk\u00f6isten vikojen, kuten oikosulkujen, aukkojen ja komponenttivikojen, nopean havaitsemisen.Toisin kuin AOI (optinen tarkastus), ICT validoi toiminnallisen suorituskyvyn tarkkojen s\u00e4hk\u00f6isten mittausten avulla, ja tarkkuus perustuu suojaustekniikoihin. T\u00e4ss\u00e4 FAQ:ssa k\u00e4sitell\u00e4\u00e4n ICT:n keskeisi\u00e4 ominaisuuksia, etuja manuaaliseen testaukseen verrattuna ja integrointia tuotannon ty\u00f6nkulkuihin, mik\u00e4 tekee siit\u00e4 v\u00e4ltt\u00e4m\u00e4tt\u00f6m\u00e4n elektroniikan kokoonpanon laadunvalvonnassa.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00e4ss\u00e4 oppaassa kerrotaan ICT-testauksesta (In-Circuit Test), joka on PCBA-laadunvalvonnan kulmakivi. Siin\u00e4 vastataan testattavia komponentteja (vastukset, IC:t) koskeviin usein kysyttyihin kysymyksiin, verrataan ICT:t\u00e4 AOI:hen ja korostetaan etuja, kuten kustannusten alentamista ja vikojen ehk\u00e4isy\u00e4. Sopii erinomaisesti tuotantolinjan testausta optimoiville insin\u00f6\u00f6reille.<\/p>","protected":false},"author":1,"featured_media":3318,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109],"tags":[283,287],"class_list":["post-3314","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","tag-aoi","tag-ict"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is ICT\uff1f - Topfastpcb<\/title>\n<meta name=\"description\" content=\"Discover how ICT testing improves PCBA quality by detecting shorts, opens &amp; component defects. 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