{"id":74811,"date":"2026-09-05T17:42:37","date_gmt":"2026-09-05T12:12:37","guid":{"rendered":"https:\/\/stitchpartner.com\/?post_type=product&#038;p=74811"},"modified":"2026-10-06T09:05:47","modified_gmt":"2026-10-06T03:35:47","slug":"gt-900d-speed-controller-pcb-overlock-machine","status":"publish","type":"product","link":"https:\/\/stitchpartner.com\/hi\/product\/gt-900d-speed-controller-pcb-overlock-machine\/","title":{"rendered":"GT-900D Speed Controller PCB for Overlock Machine"},"content":{"rendered":"<p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"105\" data-end=\"464\">If your <strong data-start=\"113\" data-end=\"152\">GT-900D industrial overlock machine<\/strong> has inconsistent foot-pedal speed control, this <strong data-start=\"201\" data-end=\"243\">Speed Controller Foot Pedal PCB Module<\/strong> is designed as a replacement electronic control board. It uses the <strong data-start=\"311\" data-end=\"347\">SUPU Pedal Potentiostat VER:1.25<\/strong> configuration to read pedal movement and provide variable speed control to the compatible direct-drive motor system.<\/p>\n<p data-start=\"466\" data-end=\"700\">The PCB is intended for <strong data-start=\"490\" data-end=\"567\">GT-900D, GT-700D and compatible direct-drive industrial overlock machines<\/strong> using the specified SUPU pedal potentiostat system. The supplied board is a <strong data-start=\"644\" data-end=\"663\">PCB module only<\/strong>, not a complete foot pedal assembly.<\/p>\n<p data-start=\"702\" data-end=\"931\">The competitor listing also positions the GT-900D speed controller as a replacement part for industrial overlock machines and describes its purpose as smoother, more precise speed regulation.<\/p>\n<h2 data-section-id=\"341tem\" data-start=\"933\" data-end=\"971\">What This Speed Controller PCB Does<\/h2>\n<p data-start=\"973\" data-end=\"1227\">The pedal PCB converts the movement of the sewing machine foot pedal into an electronic control signal for the motor drive. This allows the operator to start at a controlled speed, increase speed progressively and reduce speed by changing pedal pressure.<\/p>\n<p data-start=\"1229\" data-end=\"1522\">A functional foot controller is important for controlled overlock sewing, especially when handling detailed sections or working at lower speeds. General SUPU foot-controller documentation likewise describes variable speed operation through pedal pressure.<\/p>\n<h3 data-section-id=\"1iz91iu\" data-start=\"1524\" data-end=\"1540\">\u092a\u094d\u0930\u092e\u0941\u0916 \u0935\u093f\u0936\u0947\u0937\u0924\u093e\u0910\u0902<\/h3>\n<ul data-start=\"1542\" data-end=\"1978\">\n<li data-section-id=\"11153yt\" data-start=\"1542\" data-end=\"1598\"><strong data-start=\"1544\" data-end=\"1580\">SUPU Pedal Potentiostat VER:1.25<\/strong> PCB configuration<\/li>\n<li data-section-id=\"8k61hx\" data-start=\"1599\" data-end=\"1672\">Integrated <strong data-start=\"1612\" data-end=\"1643\">Hall-effect magnetic sensor<\/strong> for pedal position detection<\/li>\n<li data-section-id=\"o2gdrn\" data-start=\"1673\" data-end=\"1710\">Onboard signal-processing circuitry<\/li>\n<li data-section-id=\"194n41j\" data-start=\"1711\" data-end=\"1777\">Protective silicone\/resin coating over critical electronic areas<\/li>\n<li data-section-id=\"1jfqbil\" data-start=\"1778\" data-end=\"1814\">Multi-pin header connection points<\/li>\n<li data-section-id=\"5ih0wm\" data-start=\"1815\" data-end=\"1872\">Rigid PCB mounting base with pre-drilled mounting holes<\/li>\n<li data-section-id=\"vqrl6e\" data-start=\"1873\" data-end=\"1956\">Suitable replacement component for compatible direct-drive overlock pedal systems<\/li>\n<li data-section-id=\"1krv80j\" data-start=\"1957\" data-end=\"1978\"><strong data-start=\"1959\" data-end=\"1978\">Pack of 1 piece<\/strong><\/li>\n<\/ul>\n<p data-start=\"1980\" data-end=\"2054\">The PCB marking\/revision is specified as <strong data-start=\"2021\" data-end=\"2053\">VER:1.25 (2019.1.2 \/ 2023.2)<\/strong>.<\/p>\n<h2 data-section-id=\"1s5rwj2\" data-start=\"2056\" data-end=\"2080\">\u092e\u0936\u0940\u0928 \u0905\u0928\u0941\u0915\u0942\u0932\u0924\u093e<\/h2>\n<div class=\"group TyagGW_tableContainer\">\n<div class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2082\" data-end=\"2374\">\n<thead data-start=\"2082\" data-end=\"2111\">\n<tr data-start=\"2082\" data-end=\"2111\">\n<th class=\"last:pe-10\" data-start=\"2082\" data-end=\"2097\" data-col-size=\"md\">\u092e\u0936\u0940\u0928 \u0915\u093e \u092a\u094d\u0930\u0915\u093e\u0930<\/th>\n<th class=\"last:pe-10\" data-start=\"2097\" data-end=\"2111\" data-col-size=\"sm\">\u0905\u0928\u0941\u0915\u0942\u0932<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2122\" data-end=\"2374\">\n<tr data-start=\"2122\" data-end=\"2167\">\n<td data-start=\"2122\" data-end=\"2160\" data-col-size=\"md\">GT-900D Industrial Overlock Machine<\/td>\n<td data-col-size=\"sm\" data-start=\"2160\" data-end=\"2167\">\u0939\u093e\u0901<\/td>\n<\/tr>\n<tr data-start=\"2168\" data-end=\"2213\">\n<td data-start=\"2168\" data-end=\"2206\" data-col-size=\"md\">GT-700D Industrial Overlock Machine<\/td>\n<td data-start=\"2206\" data-end=\"2213\" data-col-size=\"sm\">\u0939\u093e\u0901<\/td>\n<\/tr>\n<tr data-start=\"2214\" data-end=\"2294\">\n<td data-start=\"2214\" data-end=\"2287\" data-col-size=\"md\">Compatible Direct-Drive Overlock Machine using SUPU VER:1.25 pedal PCB<\/td>\n<td data-col-size=\"sm\" data-start=\"2287\" data-end=\"2294\">\u0939\u093e\u0901<\/td>\n<\/tr>\n<tr data-start=\"2295\" data-end=\"2337\">\n<td data-start=\"2295\" data-end=\"2331\" data-col-size=\"md\">\u0938\u093f\u0902\u0917\u0932 \u0928\u0940\u0921\u0932 \u0932\u0949\u0915 \u0938\u094d\u091f\u093f\u091a \u092e\u0936\u0940\u0928<\/td>\n<td data-col-size=\"sm\" data-start=\"2331\" data-end=\"2337\">\u0928\u0939\u0940\u0902<\/td>\n<\/tr>\n<tr data-start=\"2338\" data-end=\"2374\">\n<td data-start=\"2338\" data-end=\"2368\" data-col-size=\"md\">TA1 \u091b\u093e\u0924\u093e \u0938\u093f\u0932\u093e\u0908 \u092e\u0936\u0940\u0928<\/td>\n<td data-start=\"2368\" data-end=\"2374\" data-col-size=\"sm\">\u0928\u0939\u0940\u0902<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"2376\" data-end=\"2564\"><strong data-start=\"2376\" data-end=\"2390\">\u092e\u0939\u0924\u094d\u0935\u092a\u0942\u0930\u094d\u0923:<\/strong> Compatibility depends on the pedal electronics and motor-control system. Please compare your existing PCB marking, connector arrangement and mounting layout before ordering.<\/p>\n<p data-start=\"2566\" data-end=\"2704\">If your existing board does not match the <strong data-start=\"2608\" data-end=\"2644\">SUPU Pedal Potentiostat VER:1.25<\/strong> configuration, please verify compatibility before purchase.<\/p>\n<h2 data-section-id=\"19wny3c\" data-start=\"2706\" data-end=\"2746\">Why Replace the Pedal Controller PCB?<\/h2>\n<p data-start=\"2748\" data-end=\"2978\">A damaged or malfunctioning pedal sensor board can affect how the machine responds to foot pressure. Symptoms may include irregular speed response, difficulty controlling low-speed operation or an inconsistent start\/stop response.<\/p>\n<p data-start=\"2980\" data-end=\"3150\">Replacing the PCB can restore the pedal&#8217;s electronic position-sensing function when the original board is faulty and the replacement matches the machine&#8217;s control system.<\/p>\n<p data-start=\"3152\" data-end=\"3331\">This is particularly useful for <strong data-start=\"3184\" data-end=\"3284\">tailors, garment factories, overlock machine technicians and sewing-machine repair professionals<\/strong> maintaining direct-drive industrial equipment.<\/p>\n<h2 data-section-id=\"l1uxj5\" data-start=\"3333\" data-end=\"3350\">\u0938\u0930\u094d\u0935\u094b\u0924\u094d\u0924\u092e \u0909\u092a\u092f\u094b\u0917 \u0915\u0947 \u092e\u093e\u092e\u0932\u0947<\/h2>\n<p data-start=\"3352\" data-end=\"3477\">This electronic spare part is intended for <strong data-start=\"3395\" data-end=\"3440\">industrial overlock machine speed control<\/strong>, rather than fabric-specific sewing.<\/p>\n<p data-start=\"3479\" data-end=\"3582\">The controller can be useful when the operator needs controlled machine speed for operations involving:<\/p>\n<ul data-start=\"3584\" data-end=\"3739\">\n<li data-section-id=\"1l01dqo\" data-start=\"3584\" data-end=\"3601\">Cotton garments<\/li>\n<li data-section-id=\"4zjqsi\" data-start=\"3602\" data-end=\"3622\">Polyester garments<\/li>\n<li data-section-id=\"9vxt57\" data-start=\"3623\" data-end=\"3643\">Lightweight fabric<\/li>\n<li data-section-id=\"16zab3x\" data-start=\"3644\" data-end=\"3663\">Knitted materials<\/li>\n<li data-section-id=\"1e62axp\" data-start=\"3664\" data-end=\"3693\">\u0938\u093e\u092e\u093e\u0928\u094d\u092f \u0935\u0938\u094d\u0924\u094d\u0930 \u0913\u0935\u0930\u0932\u0949\u0915\u093f\u0902\u0917<\/li>\n<li data-section-id=\"mnh6g8\" data-start=\"3694\" data-end=\"3719\">Detailed edge finishing<\/li>\n<li data-section-id=\"c4cqne\" data-start=\"3720\" data-end=\"3739\">Production sewing<\/li>\n<\/ul>\n<p data-start=\"3741\" data-end=\"3854\">The fabric itself does not determine PCB compatibility. The <strong data-start=\"3801\" data-end=\"3853\">machine&#8217;s pedal and motor-control electronics do<\/strong>.<\/p>\n<h2 data-section-id=\"b0zjmv\" data-start=\"3856\" data-end=\"3881\">How To Install the PCB<\/h2>\n<ol data-start=\"3883\" data-end=\"4464\">\n<li data-section-id=\"y3340y\" data-start=\"3883\" data-end=\"3957\"><strong data-start=\"3886\" data-end=\"3923\">Switch off and unplug the machine<\/strong> before opening the pedal housing.<\/li>\n<li data-section-id=\"1u1dmem\" data-start=\"3958\" data-end=\"4043\">Remove the existing foot-pedal cover according to the machine&#8217;s service procedure.<\/li>\n<li data-section-id=\"10rg655\" data-start=\"4044\" data-end=\"4157\">Compare the old PCB with the replacement, including the PCB marking, connector arrangement and mounting holes.<\/li>\n<li data-section-id=\"1gnohpa\" data-start=\"4158\" data-end=\"4201\">Disconnect the existing board carefully.<\/li>\n<li data-section-id=\"csy2ve\" data-start=\"4202\" data-end=\"4279\">Install the replacement PCB in the same orientation and mounting position.<\/li>\n<li data-section-id=\"1j52w3h\" data-start=\"4280\" data-end=\"4368\">Reconnect the wiring and terminals exactly as required by the original configuration.<\/li>\n<li data-section-id=\"5du1wi\" data-start=\"4369\" data-end=\"4405\">Close the pedal housing securely.<\/li>\n<li data-section-id=\"a2vukg\" data-start=\"4406\" data-end=\"4464\">Power on the machine and test pedal response gradually.<\/li>\n<\/ol>\n<p data-start=\"4466\" data-end=\"4621\"><strong data-start=\"4466\" data-end=\"4621\">Electrical installation should be performed by a qualified sewing-machine technician when you are unsure about the wiring or control-board connections.<\/strong><\/p>\n<hr data-start=\"4623\" data-end=\"4626\" \/>\n<h2 data-section-id=\"13h5kf5\" data-start=\"4628\" data-end=\"4659\">3. FREQUENTLY ASKED QUESTIONS<\/h2>\n<h3 data-section-id=\"8osaw3\" data-start=\"4661\" data-end=\"4695\">Is this a complete foot pedal?<\/h3>\n<p data-start=\"4697\" data-end=\"4908\"><strong data-start=\"4697\" data-end=\"4704\">\u0928\u0939\u0940\u0902\u0964.<\/strong> This listing is for <strong data-start=\"4725\" data-end=\"4771\">one Speed Controller Foot Pedal PCB Module<\/strong>. It is the electronic PCB component used inside the compatible pedal assembly, not a complete pedal housing or complete foot controller.<\/p>\n<h3 data-section-id=\"hy6iju\" data-start=\"4910\" data-end=\"4971\">Is this PCB compatible with the GT-900D overlock machine?<\/h3>\n<p data-start=\"4973\" data-end=\"5237\"><strong data-start=\"4973\" data-end=\"4981\">\u0939\u093e\u0901\u0964.<\/strong> It is specified for the <strong data-start=\"5006\" data-end=\"5045\">GT-900D industrial overlock machine<\/strong> and uses the SUPU Pedal Potentiostat VER:1.25 configuration. The GT-900D is also listed commercially with a dedicated speed-controller replacement board.<\/p>\n<h3 data-section-id=\"mx6baf\" data-start=\"5239\" data-end=\"5275\">Can I use this PCB with GT-700D?<\/h3>\n<p data-start=\"5277\" data-end=\"5484\"><strong data-start=\"5277\" data-end=\"5338\">Yes, according to the supplied compatibility information.<\/strong> It is specified for GT-700D as well as GT-900D and compatible direct-drive overlock systems using the same SUPU pedal potentiostat configuration.<\/p>\n<h3 data-section-id=\"14hocn4\" data-start=\"5486\" data-end=\"5544\">What does a sewing machine pedal speed-control PCB do?<\/h3>\n<p data-start=\"5546\" data-end=\"5775\"><strong data-start=\"5546\" data-end=\"5652\">It detects foot-pedal movement and converts it into an electronic control signal for the motor system.<\/strong> This lets the operator vary sewing speed through pedal pressure rather than simply switching the motor between on and off.<\/p>\n<h3 data-section-id=\"10szzbe\" data-start=\"5777\" data-end=\"5839\">Does this PCB work with every industrial overlock machine?<\/h3>\n<p data-start=\"5841\" data-end=\"6060\"><strong data-start=\"5841\" data-end=\"5848\">\u0928\u0939\u0940\u0902\u0964.<\/strong> Compatibility depends on the machine&#8217;s motor-control system, pedal electronics, connectors and PCB configuration. Check your existing board for the <strong data-start=\"5997\" data-end=\"6033\">SUPU Pedal Potentiostat VER:1.25<\/strong> marking before purchasing.<\/p>\n<h3 data-section-id=\"lbe0p4\" data-start=\"6062\" data-end=\"6123\">Is this suitable for a Single Needle Lock Stitch Machine?<\/h3>\n<p data-start=\"6125\" data-end=\"6312\"><strong data-start=\"6125\" data-end=\"6132\">\u0928\u0939\u0940\u0902\u0964.<\/strong> This product is specified for compatible <strong data-start=\"6174\" data-end=\"6206\">industrial overlock machines<\/strong>, including GT-900D and GT-700D. It should not be treated as a universal sewing-machine speed-control PCB.<\/p>","protected":false},"excerpt":{"rendered":"<p>Speed Controller Foot Pedal PCB Module with SUPU Pedal Potentiostat VER:1.25 for GT-900D and GT-700D direct-drive industrial overlock machines. Designed for precise pedal speed sensing and smooth motor control. Pack of 1 piece.<\/p>","protected":false},"featured_media":75717,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_yoast_wpseo_focuskw":"GT-900D speed controller PCB","_yoast_wpseo_title":"GT-900D Speed Controller PCB for Overlock Machine %%sep%% %%sitename%%","_yoast_wpseo_metadesc":"Buy GT-900D speed controller PCB with SUPU Pedal Potentiostat VER:1.25 for compatible direct-drive overlock machines. Pack of 1.","_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_meta-robots-nofollow":"","_yoast_wpseo_bctitle":"","_yoast_wpseo_canonical":"","_yoast_wpseo_opengraph-title":"","_yoast_wpseo_opengraph-description":"","_yoast_wpseo_twitter-title":"","_yoast_wpseo_twitter-description":""},"product_brand":[2184],"product_cat":[1103],"product_tag":[3368,3364,3273,3362,3361,3360,3248,3272,3370,3363,3365,3369,3150,3367,3366],"class_list":["post-74811","product","type-product","status-publish","has-post-thumbnail","product_brand-stitch-partner","product_cat-sewing-machine-motherboard-and-chip","product_tag-direct-drive-overlock-spare-part","product_tag-foot-pedal-pcb","product_tag-garment-machinery-spare-parts","product_tag-gt-700d-speed-controller","product_tag-gt-900d-pcb","product_tag-gt-900d-speed-controller","product_tag-industrial-overlock-spare-part","product_tag-overlock-machine-pcb","product_tag-overlock-pedal-controller","product_tag-overlock-speed-controller","product_tag-pedal-potentiostat-pcb","product_tag-pedal-sensor-pcb","product_tag-sewing-machine-pcb","product_tag-sewing-machine-speed-control-board","product_tag-supu-ver-1-25-pcb","first","instock","sale","shipping-taxable","purchasable","product-type-simple"],"acf":[],"pure_taxonomies":{"product_brand":[{"term_id":2184,"name":"STITCH PARTNER","slug":"stitch-partner","term_group":0,"term_taxonomy_id":2184,"taxonomy":"product_brand","description":"","parent":0,"count":22,"filter":"raw","image":""}],"product_cat":[{"term_id":1103,"name":"Sewing Machine Motherboard &amp; PCB Control Boards","slug":"sewing-machine-motherboard-and-chip","term_group":0,"term_taxonomy_id":1103,"taxonomy":"product_cat","description":"<p><strong>Sewing machine motherboard and PCB control boards for industrial machines:<\/strong> main boards for Jack, Qi Xing, Zoje, Messer and Magneto machines cost \u20b91,500 to \u20b94,650 in our live catalogue, with display panels and pedal boards from \u20b9300. Match the part number printed on your old board, then order with COD across India.<\/p>\n<h2>Sewing Machine Motherboard Price List (Live Catalogue)<\/h2>\n<p>A sewing machine motherboard, also called a PCB, control board or circuit board, runs motor speed, needle position, auto-trimming and pedal response. Price depends on the machine model, not the brand name alone. Here is the current price range by board type.<\/p>\n<table><thead><tr><th>Board type<\/th><th>What it does<\/th><th>Price range<\/th><\/tr><\/thead><tbody><tr><td>Main motherboard \/ PCB control board<\/td><td>Controls motor, needle stop, trimmer and sensors<\/td><td>\u20b91,500 \u2013 \u20b94,650<\/td><\/tr><tr><td>Universal direct drive servo control board<\/td><td>Replaces a dead servo control board on direct drive motors<\/td><td>\u20b92,500<\/td><\/tr><tr><td>Overlock control board<\/td><td>Speed and function control for overlock heads<\/td><td>\u20b93,200 (Qi Xing); \u20b9649 (GT-900D speed controller)<\/td><\/tr><tr><td>Display panel \/ LED speed panel<\/td><td>Shows speed and settings, takes your button input<\/td><td>\u20b9300 \u2013 \u20b9499<\/td><\/tr><tr><td>Pedal board and foot controller<\/td><td>Sends speed signal from the foot pedal<\/td><td>\u20b9450 \u2013 \u20b91,300<\/td><\/tr><tr><td>Connectors and voltage regulator<\/td><td>Wire connectors and small support boards<\/td><td>\u20b920 \u2013 \u20b9299<\/td><\/tr><\/tbody><\/table>\n<h2>Which Motherboard Fits Which Machine<\/h2>\n<p>Do not choose a board by how the machine looks. Choose it by the part number on your old PCB. Here are the boards we stock for common industrial machines.<\/p>\n<table><thead><tr><th>Machine \/ board<\/th><th>Part number or model<\/th><th>Price<\/th><\/tr><\/thead><tbody><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/jack-a2b-pcb-19510031200\/\">Jack A2B main control board<\/a><\/td><td>19510031200<\/td><td>\u20b92,900<\/td><\/tr><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/jack-a2-cz-9950014900-pcb\/\">Jack A2-CZ motherboard PCB<\/a><\/td><td>9950014900<\/td><td>\u20b93,499<\/td><\/tr><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/jack-a2c-a2-cz-pcb-control-board\/\">Jack A2C \/ A2-CZ control board<\/a><\/td><td>A2C A2-CZ<\/td><td>\u20b92,900<\/td><\/tr><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/jack-9100b-904a-pcb-control-board-9950017800\/\">Jack 9100B 904A control board<\/a><\/td><td>9950017800<\/td><td>\u20b93,099<\/td><\/tr><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/jack-9950009500-pcb-control-board-9100bs-9100bp\/\">Jack JK-9100BS \/ 9100BP control board<\/a><\/td><td>9950009500<\/td><td>\u20b92,999<\/td><\/tr><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/jack-781g-main-pcb-control-board-19950020300\/\">Jack 781G main control board<\/a><\/td><td>19950020300<\/td><td>\u20b94,650<\/td><\/tr><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/qd8633-qi-xing-sewing-machine-control-board\/\">Qi Xing control board<\/a><\/td><td>QD8633<\/td><td>\u20b93,100<\/td><\/tr><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/qd8626-qi-xing-control-board\/\">Qi Xing control board<\/a><\/td><td>QD8626<\/td><td>\u20b93,200<\/td><\/tr><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/8623-qi-xing-control-board-zoje-sewing-machine\/\">Qi Xing control board for Zoje machines<\/a><\/td><td>QD8623<\/td><td>\u20b93,200<\/td><\/tr><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/qixing-mother-board-model-c\/\">Tova TTM Messer servo motor motherboard<\/a><\/td><td>TTM<\/td><td>\u20b91,799<\/td><\/tr><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/c3-sewing-machine-circuit-board\/\">C3 motherboard<\/a><\/td><td>C3<\/td><td>\u20b92,500<\/td><\/tr><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/magneto-motherboard-for-single-needle-sewing-machine\/\">Magneto motherboard, single needle<\/a><\/td><td>Magneto<\/td><td>\u20b92,500<\/td><\/tr><tr><td><a href=\"https:\/\/stitchpartner.com\/product\/esda-servo-motor-pcb-control-board-sewing-machine\/\">ESDA servo motor PCB control board<\/a><\/td><td>ESDA<\/td><td>\u20b91,500<\/td><\/tr><\/tbody><\/table>\n<h2>How to Choose the Right PCB for Your Machine<\/h2>\n<h3>1. Read the part number on the old board<\/h3>\n<p>Unplug the machine, open the control box and read the number printed on the green board. Order that exact number. For Jack machines you can also check our <a href=\"https:\/\/stitchpartner.com\/jack-sewing-machine-part-numbers\/\">Jack sewing machine part numbers lookup<\/a>.<\/p>\n<h3>2. Check the generation of the board<\/h3>\n<p>Some machines have an old type and a new type of the same board, for example on the Jack F4 line. Their connectors and firmware can differ, so match the type, not just the model name.<\/p>\n<h3>3. Compare connectors and voltage<\/h3>\n<p>Count the connector sockets and compare their layout with the old board. A board can physically fit and still lose trimmer, foot lifter or display functions if pins are missing.<\/p>\n<h3>4. Send us a photo before you order<\/h3>\n<p>If you are not sure, send a photo of the old PCB and the machine model. We check the match first, so you do not pay for a board that will not work.<\/p>\n<h2>Motherboard, PCB, Control Board and Control Box: What Is the Difference?<\/h2>\n<p>Buyers use these words for the same part, but a control box is the casing that holds the PCB, the power supply and the connectors. A motherboard replacement is only the board inside. If your control box is damaged or burnt, ask us whether you need the board alone or the full box such as the <a href=\"https:\/\/stitchpartner.com\/product\/direct-drive-servo-motor-control-board\/\">direct drive servo control board<\/a>.<\/p>\n<h2>Signs Your Sewing Machine PCB Has Failed<\/h2>\n<p>A failing board usually shows erratic motor speed, no reaction to the foot pedal, a frozen or blank display, or no power despite a good socket. Before you buy, rule out a loose pedal wire or a faulty motor. Our guides on <a href=\"https:\/\/stitchpartner.com\/sewing-machine-servo-motor-problems-error-codes-troubleshooting\/\">servo motor problems and error codes<\/a> and <a href=\"https:\/\/stitchpartner.com\/jack-sewing-machine-error-codes-all-models\/\">Jack error codes for all models<\/a> help you tell a board fault from a motor fault.<\/p>\n<h2>Sewing Machine Motherboard FAQ<\/h2>\n<h3>What is the price of a sewing machine motherboard in India?<\/h3>\n<p>Main PCB control boards in our catalogue cost between \u20b91,500 and \u20b94,650, depending on the machine. Jack A2B is \u20b92,900, Jack 781G is \u20b94,650 and Qi Xing QD8633 is \u20b93,100. Display panels and pedal boards cost less, from \u20b9300. Prices on this page are live catalogue prices and COD is available.<\/p>\n<h3>How do I know which PCB fits my sewing machine?<\/h3>\n<p>Match the part number printed on your old board, not the machine's looks. Then compare the connector layout and the voltage rating, and check whether your board is an old or new type. Our stock list above shows the part number for each board, so you can compare it before ordering.<\/p>\n<h3>Can I use a universal or generic PCB instead of the original?<\/h3>\n<p>A universal board works only where its connector layout and functions match your machine, for example the direct drive servo control board for servo motors. For machines with auto trim and sensors, a model-specific board is safer, because a generic board may not drive every function.<\/p>\n<h3>How do I know if the PCB is faulty and not the motor?<\/h3>\n<p>If the motor runs only at full speed, stops at random, or ignores the pedal while the pedal and wires are good, the board is the usual cause. If the machine has no power at all, check the plug, fuse and power cable first. When in doubt, send us the symptoms and the machine model.<\/p>\n<h3>Are Jack A2B and Jack A2C PCBs the same?<\/h3>\n<p>No, treat them as different boards. Jack A2B uses part number 19510031200, while the A2-CZ board uses 9950014900. Both are in stock here, so compare the number on your old board before you order. Do not swap them just because both belong to the A2 range.<\/p>\n<h3>Do you deliver sewing machine motherboards across India with COD?<\/h3>\n<p>Yes, we ship pan-India and COD is available on these boards. Check the product page for the live price and stock status before you place the order, since stock changes through the day.<\/p>","parent":0,"count":40,"filter":"raw","image":""}],"product_tag":[{"term_id":3368,"name":"direct drive overlock spare part","slug":"direct-drive-overlock-spare-part","term_group":0,"term_taxonomy_id":3368,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3364,"name":"foot pedal PCB","slug":"foot-pedal-pcb","term_group":0,"term_taxonomy_id":3364,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3273,"name":"garment machinery spare parts","slug":"garment-machinery-spare-parts","term_group":0,"term_taxonomy_id":3273,"taxonomy":"product_tag","description":"","parent":0,"count":5,"filter":"raw","image":""},{"term_id":3362,"name":"GT-700D speed controller","slug":"gt-700d-speed-controller","term_group":0,"term_taxonomy_id":3362,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3361,"name":"GT-900D PCB","slug":"gt-900d-pcb","term_group":0,"term_taxonomy_id":3361,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3360,"name":"GT-900D speed controller","slug":"gt-900d-speed-controller","term_group":0,"term_taxonomy_id":3360,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3248,"name":"industrial overlock spare part","slug":"industrial-overlock-spare-part","term_group":0,"term_taxonomy_id":3248,"taxonomy":"product_tag","description":"","parent":0,"count":2,"filter":"raw","image":""},{"term_id":3272,"name":"overlock machine PCB","slug":"overlock-machine-pcb","term_group":0,"term_taxonomy_id":3272,"taxonomy":"product_tag","description":"","parent":0,"count":5,"filter":"raw","image":""},{"term_id":3370,"name":"overlock pedal controller","slug":"overlock-pedal-controller","term_group":0,"term_taxonomy_id":3370,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3363,"name":"overlock speed controller","slug":"overlock-speed-controller","term_group":0,"term_taxonomy_id":3363,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3365,"name":"pedal potentiostat PCB","slug":"pedal-potentiostat-pcb","term_group":0,"term_taxonomy_id":3365,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3369,"name":"pedal sensor PCB","slug":"pedal-sensor-pcb","term_group":0,"term_taxonomy_id":3369,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3150,"name":"sewing machine PCB","slug":"sewing-machine-pcb","term_group":0,"term_taxonomy_id":3150,"taxonomy":"product_tag","description":"","parent":0,"count":5,"filter":"raw","image":""},{"term_id":3367,"name":"sewing machine speed control board","slug":"sewing-machine-speed-control-board","term_group":0,"term_taxonomy_id":3367,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3366,"name":"SUPU VER 1.25 PCB","slug":"supu-ver-1-25-pcb","term_group":0,"term_taxonomy_id":3366,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>GT-900D Speed Controller PCB for Overlock Machine - Stitch Partner<\/title>\n<meta name=\"description\" content=\"Buy GT-900D speed controller PCB with SUPU Pedal Potentiostat VER:1.25 for compatible direct-drive overlock machines. 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