{"id":2767,"date":"2026-04-07T01:52:54","date_gmt":"2026-04-07T01:52:54","guid":{"rendered":"https:\/\/neonledstrip.com\/?p=2767"},"modified":"2026-04-07T01:52:55","modified_gmt":"2026-04-07T01:52:55","slug":"led-strip-not-working-after-cutting","status":"publish","type":"post","link":"https:\/\/neonledstrip.com\/it\/led-strip-not-working-after-cutting\/","title":{"rendered":"La striscia LED non funziona dopo il taglio? Ecco perch\u00e9 e come risolverlo"},"content":{"rendered":"<p>LED light strips are energy-efficient, can be cut, and are easy to install, while also supporting custom sizes. However, many users may encounter a common problem during installation\u2014the LED light strip doesn&#8217;t working after cutting. So what exactly causes this phenomenon? In this article, we will analyze the reasons for this problem in detail and provide relevant solutions to help you easily solve this issue. More details, pls read <a href=\"https:\/\/neonledstrip.com\/it\/come-funzionano-le-strisce-luminose-a-led\/\" target=\"_blank\" rel=\"noreferrer noopener\">Come funzionano le strisce luminose a LED?<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-can-led-strip-lights-only-be-cut-at-specific-locations\">Perch\u00e9 le strisce luminose a LED possono essere tagliate solo in punti specifici?<\/h2>\n\n\n\n<p>LED strips cannot be arbitrarily cut; the circuit board for each LED is pre-designed. If you look closely at the light strip, you&#8217;ll see a pair of copper contact points marked with a scissor icon at short intervals. These are the designated cutting points; you can only cut at these locations.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/neonledstrip.com\/wp-content\/uploads\/2026\/04\/led-strip-not-working-after-cutting.webp\" alt=\"Striscia LED non funzionante dopo il taglio che mostra un collegamento interrotto e una sezione non illuminata\" class=\"wp-image-3376\" srcset=\"https:\/\/neonledstrip.com\/wp-content\/uploads\/2026\/04\/led-strip-not-working-after-cutting.webp 800w, https:\/\/neonledstrip.com\/wp-content\/uploads\/2026\/04\/led-strip-not-working-after-cutting-300x188.webp 300w, https:\/\/neonledstrip.com\/wp-content\/uploads\/2026\/04\/led-strip-not-working-after-cutting-768x480.webp 768w, https:\/\/neonledstrip.com\/wp-content\/uploads\/2026\/04\/led-strip-not-working-after-cutting-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Il principio di base \u00e8 il circuito parallelo. Una striscia luminosa a LED \u00e8 composta da pi\u00f9 unit\u00e0 di emissione luminosa indipendenti collegate in serie e in parallelo. Ogni punto di taglio rappresenta la fine di un'unit\u00e0 circuitale completa e l'inizio della successiva. All'interno di ogni unit\u00e0, i LED e le resistenze sono collegati in serie, mentre le unit\u00e0 stesse sono collegate in parallelo.<\/p>\n\n\n\n<p>Quando si taglia nel punto giusto, si separa solo un'unit\u00e0 parallela completa dal circuito complessivo senza influenzare il percorso di corrente all'interno di tale unit\u00e0. Per questo motivo, la parte rimanente e la parte tagliata possono funzionare in modo indipendente.<\/p>\n\n\n\n<p>Al contrario, se si taglia nel punto sbagliato, si interrompe il circuito all'interno dell'unit\u00e0, causando la mancata accensione di quell'unit\u00e0 e di tutte le unit\u00e0 successive.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-common-reasons-why-led-strip-don-t-working-after-cutting\">Common Reasons Why LED Strip Don&#8217;t Working After Cutting<\/h2>\n\n\n\n<p>Le strisce LED standard sono da 5 metri per bobina, quindi \u00e8 necessario tagliarle durante l'installazione. Naturalmente, alcune sono realizzate su misura. Durante il taglio, prestare molta attenzione alla posizione del taglio. Ecco i cinque principali fattori che causano il mancato funzionamento della striscia LED dopo il taglio.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-incorrect-cutting-position\">Posizione di taglio errata<\/h3>\n\n\n\n<p>This is the most common reason why LED strips won&#8217;t light up after being cut. As mentioned earlier, the cut must be made precisely in the middle of the copper pads marked with scissors.<\/p>\n\n\n\n<p>If you cut anywhere else between the two pads, it&#8217;s equivalent to severing the delicate FPC (Flexible Printed Circuit) wiring inside the strip. Current cannot flow, and naturally, it won&#8217;t light up.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-reversed-positive-and-negative-terminals\">Terminali positivi e negativi invertiti<\/h3>\n\n\n\n<p>LED \u00e8 l'acronimo di Light Emitting Diode (diodo a emissione luminosa) e la sua caratteristica principale \u00e8 la conduttivit\u00e0 unidirezionale. La corrente pu\u00f2 entrare solo dal terminale positivo (+) e uscire da quello negativo (-).<\/p>\n\n\n\n<p>Quando <a href=\"https:\/\/neonledstrip.com\/it\/come-tagliare-e-saldare-il-neon-flex-guidato\/\" type=\"post\" id=\"2183\" target=\"_blank\" rel=\"noreferrer noopener\">tagliare una striscia LED<\/a>, \u00e8 necessario riaccenderla. Se si invertono i terminali positivo e negativo quando si ricollega la striscia tagliata, questa non si accender\u00e0 assolutamente.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-damaged-or-cold-solder-joints\">Giunti di saldatura danneggiati o freddi<\/h3>\n\n\n\n<p>Se si sceglie di collegare la striscia di LED mediante saldatura, \u00e8 necessario un certo livello di abilit\u00e0 nella saldatura. Giunti di saldatura freddi (la saldatura non riesce a stabilire un buon contatto con le piazzole e i fili) o cortocircuiti (l'eccesso di saldatura fa s\u00ec che i terminali positivo e negativo si colleghino) causano la mancata accensione della striscia LED.<\/p>\n\n\n\n<p>Inoltre, l'uso di un saldatore surriscaldato o tenuto troppo a lungo pu\u00f2 danneggiare le fragili piazzole di rame, causandone il distacco dal substrato flessibile.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-led-strip-voltage-mismatch\">Disadattamento della tensione della striscia LED<\/h3>\n\n\n\n<p>Le strisce LED funzionano a tensioni diverse, comunemente a 12V e 24V. Queste non devono mai essere mescolate. Se si collega una striscia a 12 V a un alimentatore a 24 V, i LED si bruciano immediatamente a causa della tensione eccessiva.<\/p>\n\n\n\n<p>Al contrario, se si collega una striscia da 24 V a un alimentatore da 12 V, la striscia non si avvia o ha una luminosit\u00e0 estremamente bassa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-led-strip-damage-or-circuit-board-breakage\">Danni alla striscia LED o rottura del circuito stampato<\/h3>\n\n\n\n<p>Sometimes the problem isn&#8217;t with your handling. The LED strip itself may have suffered physical damage during shipping or installation, such as tiny cracks in the FPC circuit board that are difficult to see with the naked eye.<\/p>\n\n\n\n<p>It&#8217;s also possible that excessive force was used during installation or cutting. This can damage adjacent solder pads and cause the LED strip to fail to light up.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-properly-cut-led-strips\">Come tagliare correttamente le strisce LED?<\/h2>\n\n\n\n<p>La padronanza del metodo di taglio corretto \u00e8 fondamentale per garantire il corretto funzionamento delle strisce LED. Il taglio delle strisce LED \u00e8 generalmente necessario.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Come tagliare, saldare e collegare la striscia LED COB\" width=\"720\" height=\"405\" src=\"https:\/\/www.youtube.com\/embed\/y2lZQs4lfg8?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-1-power-off-operation\">Fase 1: Spegnimento<\/h3>\n\n\n\n<p>Prima di tagliare la striscia LED, scollegare sempre l'alimentazione. Assicurarsi che la striscia sia completamente spenta. Tagliare mentre il circuito \u00e8 sotto tensione non solo \u00e8 pericoloso, ma pu\u00f2 anche danneggiare la striscia a causa di un cortocircuito momentaneo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-2-precise-positioning\">Fase 2: Posizionamento preciso<\/h3>\n\n\n\n<p>Lay the LED strip flat on the work surface and carefully locate the cutting marks using sufficient light. These marks are usually indicated by a scissor icon, dotted lines, or the word &#8220;CUT HERE,&#8221; and are fixed in the center between the two copper foil pads.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-3-tool-selection\">Fase 3: Selezione dello strumento<\/h3>\n\n\n\n<p>Per il taglio \u00e8 necessario utilizzare forbici affilate o un taglierino. Gli strumenti opachi comprimono il circuito stampato, causando potenzialmente la deformazione o addirittura la rottura della lamina di rame interna. Agli utenti professionali si raccomanda di utilizzare forbici specifiche per i componenti elettronici per un taglio pi\u00f9 netto.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-4-vertical-cutting\">Fase 4: Taglio verticale<\/h3>\n\n\n\n<p>Mantenere la lama perpendicolare alla superficie della striscia luminosa ed eseguire un taglio singolo e rapido; evitare tagli ripetuti o angolati. Il bordo tagliato deve essere pulito e liscio, privo di bave o detriti di plastica strappati.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-5-inspect-the-cut\">Fase 5: ispezione del taglio<\/h3>\n\n\n\n<p>Subito dopo il taglio, ispezionare entrambe le estremit\u00e0 del taglio per verificare che le piazzole di rame siano completamente esposte. La superficie delle piazzole deve essere liscia e piatta, priva di residui di plastica; questo \u00e8 fondamentale per le successive connessioni.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-6-protective-treatment\">Fase 6: Trattamento protettivo<\/h3>\n\n\n\n<p>Se l'estremit\u00e0 tagliata della striscia LED non deve essere utilizzata immediatamente, si consiglia di avvolgere le piazzole di saldatura con nastro isolante per evitare l'ingresso di polvere e umidit\u00e0 o per evitare cortocircuiti accidentali.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-summary\">Sintesi<\/h2>\n\n\n\n<p>Il taglio corretto delle strisce luminose a LED \u00e8 essenziale per garantirne il corretto funzionamento in seguito. Confidiamo che ora abbiate una comprensione completa del funzionamento delle strisce LED, delle tecniche di taglio e della risoluzione dei problemi. Siete passati dalla comprensione di <em>perch\u00e9<\/em> possono essere tagliati per sapere come evitare le insidie che li causano. <em>non<\/em> per illuminare. Se avete bisogno di strisce luminose a LED o di <a href=\"https:\/\/neonledstrip.com\/it\/striscia-neon\/\" type=\"link\" id=\"https:\/\/neonledstrip.com\/neon-strip\/\" target=\"_blank\" rel=\"noreferrer noopener\">flex al neon<\/a>, non esitate a contattarci.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-faqs\">Domande frequenti<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1762571454062\"><strong class=\"schema-faq-question\">Come si fa a distinguere tra strisce LED a 12 e 24 V?<\/strong> <p class=\"schema-faq-answer\">It is quite easy to distinguish between them; you can check the information printed on the packaging or look for the labels &#8220;DC12V&#8221; or &#8220;DC24V&#8221; clearly printed directly on the LED strip&#8217;s PCB board.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1762571455076\"><strong class=\"schema-faq-question\">Un segmento molto corto di una striscia LED pu\u00f2 essere utilizzato in modo indipendente dopo essere stato tagliato?<\/strong> <p class=\"schema-faq-answer\">S\u00ec, \u00e8 possibile. A condizione che si tagli nella posizione corretta e che si possa fornire una fonte di alimentazione compatibile - saldando o utilizzando un connettore miniaturizzato - qualsiasi segmento della striscia luminosa che sia pi\u00f9 lungo di una singola unit\u00e0 di taglio pu\u00f2 funzionare in modo indipendente.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1762571455742\"><strong class=\"schema-faq-question\">Le strisce luminose a LED possono essere tagliate ovunque?<\/strong> <p class=\"schema-faq-answer\">No, le strisce luminose a LED possono essere tagliate solo in punti specifici. \u00c8 necessario seguire le linee di taglio indicate sulla striscia. Un taglio improprio pu\u00f2 impedire il corretto funzionamento della striscia luminosa o causare danni al circuito. Ogni striscia luminosa presenta punti di taglio predefiniti.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1762571456283\"><strong class=\"schema-faq-question\">Why won&#8217;t an LED strip light up after being cut?<\/strong> <p class=\"schema-faq-answer\">Le ragioni possono essere diverse. Tra i motivi per cui una striscia LED potrebbe non accendersi dopo essere stata tagliata vi sono: il taglio nella posizione sbagliata, l'inversione della polarit\u00e0 positiva e negativa, giunti di saldatura danneggiati, una mancata corrispondenza di tensione tra la striscia e l'alimentatore o un danno alla scheda del circuito.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1762571457534\"><strong class=\"schema-faq-question\">Il taglio di una striscia LED influisce sulla sua luminosit\u00e0 o sulle prestazioni cromatiche?<\/strong> <p class=\"schema-faq-answer\">Se il taglio viene effettuato nella posizione corretta e il circuito non viene danneggiato, la luminosit\u00e0 e le prestazioni cromatiche della striscia LED non ne risentono. In generale, il taglio della striscia non ne modifica l'effetto luminoso o la resa cromatica.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>LED light strips are energy-efficient, can be cut, and are easy to install, while also supporting custom sizes. However, many&#8230;<\/p>","protected":false},"author":1,"featured_media":3376,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[13],"tags":[316,318,317],"class_list":["post-2767","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-cut-led-strip-not-working","tag-how-to-cut-led-strip","tag-led-strip-repair"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.0 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>LED Strip Not Working After Cutting? 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