{"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-leiste-funktioniert-nach-dem-schneiden-nicht","status":"publish","type":"post","link":"https:\/\/neonledstrip.com\/de\/led-leiste-funktioniert-nach-dem-schneiden-nicht\/","title":{"rendered":"LED-Streifen funktioniert nach dem Schneiden nicht? Warum und wie man es repariert?"},"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\/de\/wie-funktionieren-led-leuchtbander\/\" target=\"_blank\" rel=\"noreferrer noopener\">Wie funktionieren LED-Leuchtb\u00e4nder?<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-can-led-strip-lights-only-be-cut-at-specific-locations\">Warum k\u00f6nnen LED-Leuchtb\u00e4nder nur an bestimmten Stellen geschnitten werden?<\/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=\"LED-Leiste funktioniert nach dem Schneiden nicht mehr und zeigt unterbrochene Verbindung und unbeleuchteten Abschnitt\" 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>Das zugrunde liegende Prinzip ist die Parallelschaltung. Eine LED-Lichtleiste besteht aus mehreren unabh\u00e4ngigen lichtemittierenden Einheiten, die in Reihe und parallel geschaltet sind. Jeder Schnittpunkt stellt das Ende einer kompletten Schaltungseinheit und den Anfang der n\u00e4chsten dar. Innerhalb jeder Einheit sind die LEDs und Widerst\u00e4nde in Reihe geschaltet, w\u00e4hrend die Einheiten selbst parallel geschaltet sind.<\/p>\n\n\n\n<p>Wenn Sie an der richtigen Stelle schneiden, trennen Sie nur eine komplette parallele Einheit vom Gesamtstromkreis, ohne den Strompfad innerhalb dieser Einheit zu beeintr\u00e4chtigen. Deshalb k\u00f6nnen der verbleibende Teil und der abgeschnittene Teil unabh\u00e4ngig voneinander funktionieren.<\/p>\n\n\n\n<p>Wenn Sie dagegen an der falschen Stelle schneiden, unterbrechen Sie den Schaltkreis in diesem Ger\u00e4t, so dass dieses Ger\u00e4t und alle nachfolgenden Ger\u00e4te nicht mehr aufleuchten.<\/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>Die Standard-LED-Streifen haben eine L\u00e4nge von 5 Metern pro Rolle, so dass bei der Installation ein Zuschnitt erforderlich ist. Nat\u00fcrlich gibt es auch Sonderanfertigungen. Achten Sie beim Schneiden genau auf die Schnittposition. Hier sind f\u00fcnf Hauptursachen daf\u00fcr, dass der LED-Streifen nach dem Schneiden nicht mehr funktioniert.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-incorrect-cutting-position\">Falsche Schnittposition<\/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\">Umgekehrte positive und negative Klemmen<\/h3>\n\n\n\n<p>LED steht f\u00fcr Light Emitting Diode (Leuchtdiode), und ihre Haupteigenschaft ist die unidirektionale Leitf\u00e4higkeit. Strom kann nur von der positiven (+) Klemme hinein und von der negativen (-) Klemme heraus flie\u00dfen.<\/p>\n\n\n\n<p>Wenn <a href=\"https:\/\/neonledstrip.com\/de\/schneiden-und-loten-von-neon-flex-leitungen\/\" type=\"post\" id=\"2183\" target=\"_blank\" rel=\"noreferrer noopener\">Schneiden eines LED-Streifens<\/a>, muss er neu beleuchtet werden. Wenn Sie beim Wiederanschlie\u00dfen des abgeschnittenen Streifens die Plus- und Minuspole vertauschen, leuchtet der Streifen auf keinen Fall auf.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-damaged-or-cold-solder-joints\">Besch\u00e4digte oder kalte L\u00f6tstellen<\/h3>\n\n\n\n<p>Wenn Sie den LED-Streifen durch L\u00f6ten anschlie\u00dfen m\u00f6chten, ist ein gewisses Ma\u00df an Geschicklichkeit beim L\u00f6ten erforderlich. Kalte L\u00f6tstellen (das L\u00f6tzinn kommt nicht gut mit den Pads und Dr\u00e4hten in Kontakt) oder Kurzschl\u00fcsse (zu viel L\u00f6tzinn f\u00fchrt dazu, dass sich die Plus- und Minuspole verbinden) f\u00fchren dazu, dass der LED-Streifen nicht aufleuchtet.<\/p>\n\n\n\n<p>Au\u00dferdem kann die Verwendung eines \u00fcberhitzten L\u00f6tkolbens oder ein zu langes Halten des L\u00f6tkolbens die empfindlichen Kupferpads besch\u00e4digen, so dass sie sich vom flexiblen Substrat l\u00f6sen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-led-strip-voltage-mismatch\">LED-Streifen Spannungsfehlanpassung<\/h3>\n\n\n\n<p>LED-Leisten arbeiten mit unterschiedlichen Spannungen, in der Regel 12 und 24 V. Diese d\u00fcrfen niemals gemischt werden. Wenn Sie eine 12-Volt-Leiste an eine 24-Volt-Stromversorgung anschlie\u00dfen, brennen die LEDs wegen der zu hohen Spannung sofort durch.<\/p>\n\n\n\n<p>Umgekehrt f\u00fchrt der Anschluss einer 24-Volt-Leiste an eine 12-Volt-Stromversorgung dazu, dass die Leiste nicht startet oder eine extrem geringe Helligkeit aufweist.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-led-strip-damage-or-circuit-board-breakage\">Besch\u00e4digung von LED-Streifen oder Bruch der Leiterplatte<\/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\">Wie schneidet man LED-Streifen richtig zu?<\/h2>\n\n\n\n<p>Die Beherrschung der richtigen Schneidemethode ist der Schl\u00fcssel zur Gew\u00e4hrleistung der ordnungsgem\u00e4\u00dfen Funktion von LED-Streifen. Das Schneiden von LED-Streifen ist generell notwendig.<\/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=\"Schneiden, L\u00f6ten und Verbinden von COB-LED-Streifen\" 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\">Schritt 1: Ausschaltvorgang<\/h3>\n\n\n\n<p>Trennen Sie vor dem Schneiden des LED-Streifens immer die Stromzufuhr. Vergewissern Sie sich, dass der Streifen vollst\u00e4ndig ausgeschaltet ist. Das Schneiden unter Spannung ist nicht nur gef\u00e4hrlich, sondern kann auch den Streifen durch einen Kurzschluss besch\u00e4digen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-2-precise-positioning\">Schritt 2: Pr\u00e4zise Positionierung<\/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\">Schritt 3: Werkzeugauswahl<\/h3>\n\n\n\n<p>Zum Schneiden m\u00fcssen wir eine scharfe Schere oder ein Universalmesser verwenden. Stumpfe Werkzeuge dr\u00fccken die Leiterplatte zusammen, was zu einer Verformung oder sogar zum Bruch der inneren Kupferfolie f\u00fchren kann. Professionellen Anwendern wird empfohlen, f\u00fcr einen saubereren Schnitt eine auf elektronische Bauteile zugeschnittene Schere zu verwenden.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-4-vertical-cutting\">Schritt 4: Vertikales Schneiden<\/h3>\n\n\n\n<p>Halten Sie die Klinge senkrecht zur Oberfl\u00e4che des Lichtstreifens und machen Sie einen einzigen, schnellen Schnitt; vermeiden Sie wiederholtes oder schr\u00e4ges Schneiden. Die Schnittkante sollte sauber und glatt sein, frei von Graten oder abgerissenen Kunststoffresten.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-5-inspect-the-cut\">Schritt 5: Pr\u00fcfen Sie den Schnitt<\/h3>\n\n\n\n<p>Pr\u00fcfen Sie unmittelbar nach dem Schneiden beide Enden des Schnittes, um sicherzustellen, dass die Kupferfolienpads vollst\u00e4ndig freigelegt sind. Die Oberfl\u00e4che der Pads sollte glatt und flach sein, frei von abdeckenden Kunststoffresten; dies ist f\u00fcr die sp\u00e4teren Verbindungen entscheidend.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-6-protective-treatment\">Schritt 6: Sch\u00fctzende Behandlung<\/h3>\n\n\n\n<p>Wenn das abgeschnittene Ende des LED-Streifens nicht sofort verwendet werden soll, empfiehlt es sich, die L\u00f6tpunkte mit Isolierband zu umwickeln, um das Eindringen von Staub und Feuchtigkeit zu verhindern oder um versehentliche Kurzschl\u00fcsse zu vermeiden.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-summary\">Zusammenfassung<\/h2>\n\n\n\n<p>Das richtige Schneiden von LED-Leuchtb\u00e4ndern ist wichtig, um sicherzustellen, dass sie danach richtig funktionieren. Wir gehen davon aus, dass Sie nun ein umfassendes Verst\u00e4ndnis der Funktionsweise von LED-Leuchtb\u00e4ndern, der Schneidetechniken und der Fehlersuche haben. Sie haben Fortschritte gemacht vom Verst\u00e4ndnis <em>warum<\/em> sie k\u00f6nnen reduziert werden, wenn man wei\u00df, wie man die Fallstricke vermeidet, die sie verursachen <em>nicht<\/em> zu beleuchten. Wenn Sie LED-Lichtleisten ben\u00f6tigen oder <a href=\"https:\/\/neonledstrip.com\/de\/neon-streifen\/\" type=\"link\" id=\"https:\/\/neonledstrip.com\/neon-strip\/\" target=\"_blank\" rel=\"noreferrer noopener\">Neon-Flex<\/a>, z\u00f6gern Sie bitte nicht, uns zu kontaktieren.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-faqs\">FAQs<\/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\">Wie unterscheidet man zwischen 12V und 24V LED-Lichtleisten?<\/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\">Kann ein sehr kurzes Segment eines LED-Streifens nach dem Schneiden noch unabh\u00e4ngig verwendet werden?<\/strong> <p class=\"schema-faq-answer\">Ja, das kann es. Vorausgesetzt, Sie schneiden an der richtigen Stelle und k\u00f6nnen eine kompatible Stromquelle bereitstellen - entweder durch L\u00f6ten oder mit einem Miniaturstecker - kann jedes Segment des Lichtstreifens, das l\u00e4nger als eine einzelne Schneideeinheit ist, unabh\u00e4ngig funktionieren.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1762571455742\"><strong class=\"schema-faq-question\">K\u00f6nnen LED-Lichtleisten \u00fcberall geschnitten werden?<\/strong> <p class=\"schema-faq-answer\">Nein, LED-Lichtleisten k\u00f6nnen nur an bestimmten Stellen geschnitten werden. Sie m\u00fcssen den auf dem Streifen markierten Schnittlinien folgen. Unsachgem\u00e4\u00dfes Schneiden kann dazu f\u00fchren, dass der Lichtstreifen nicht mehr richtig funktioniert oder der Stromkreis besch\u00e4digt wird. Jeder Lichtstreifen verf\u00fcgt \u00fcber vordefinierte Schnittpunkte.<\/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\">Daf\u00fcr gibt es mehrere m\u00f6gliche Gr\u00fcnde. Zu den Gr\u00fcnden, warum ein LED-Streifen nach dem Schneiden nicht aufleuchtet, geh\u00f6ren: Schneiden an der falschen Stelle, Verwechseln der positiven und negativen Polarit\u00e4t, besch\u00e4digte L\u00f6tstellen, eine falsche Spannung zwischen dem Streifen und der Stromversorgung oder eine Besch\u00e4digung der Leiterplatte.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1762571457534\"><strong class=\"schema-faq-question\">Beeintr\u00e4chtigt das Schneiden eines LED-Streifens seine Helligkeit oder Farbleistung?<\/strong> <p class=\"schema-faq-answer\">Wenn der Schnitt an der richtigen Stelle erfolgt und die Schaltung unbesch\u00e4digt bleibt, werden die Helligkeit und die Farbleistung des LED-Streifens nicht beeintr\u00e4chtigt. Im Allgemeinen werden durch das Schneiden des Streifens weder die Lichtwirkung noch die Farbwiedergabe ver\u00e4ndert.<\/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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