{"id":31435,"date":"2026-09-03T16:28:46","date_gmt":"2026-09-03T10:58:46","guid":{"rendered":"https:\/\/stitchpartner.com\/?post_type=product&p=31435"},"modified":"2026-09-03T17:12:18","modified_gmt":"2026-09-03T11:42:18","slug":"jack-9100b-904a-pcb-control-board-9950017800","status":"publish","type":"product","link":"https:\/\/stitchpartner.com\/hi\/product\/jack-9100b-904a-pcb-control-board-9950017800\/","title":{"rendered":"Jack 9100B 904A PCB Control Board 9950017800"},"content":{"rendered":"

Jack 9100B 904A PCB Control Board 9950017800<\/h3>\n

The Jack 9100B 904A PCB Control Board 9950017800<\/strong><\/a> is the main electronic control board for compatible Jack JK-9100B series direct-drive single-needle lockstitch machines. It is designed to manage the electronic functions of the sewing machine and its direct-drive motor system.<\/p>\n

This replacement PCB is identified by Part No. 9950017800<\/strong> \u0914\u0930 PCB Code 904A<\/strong>. The same part number and 904A designation are also identified by specialist sewing-machine-parts listings for the Jack JK-9100B control box.<\/p>\n

\u092a\u0948\u0915 \u092e\u093e\u0924\u094d\u0930\u093e:<\/strong> 1 \u091f\u0941\u0915\u0921\u093c\u093e<\/p>\n

Designed for Jack JK-9100B Series Machines<\/a><\/h3>\n
    \n
  • \u091c\u0948\u0915 \u091c\u0947\u0915\u0947-9100\u092c\u0940<\/li>\n
  • Jack JK-9100BS<\/li>\n
  • Jack JK-9100BP<\/li>\n<\/ul>\n

    The primary application is the single-needle direct-drive lockstitch machine<\/strong>. Before ordering, compare the part number and PCB marking on your existing board with 9950017800 \/ 904A<\/strong>.<\/p>\n

    \u092a\u094d\u0930\u092e\u0941\u0916 \u0935\u093f\u0936\u0947\u0937\u0924\u093e\u0910\u0902<\/h3>\n

    High-Capacity Power Filtering<\/strong>
    The PCB incorporates a main electrolytic capacitor and filtering components designed to help smooth the machine’s rectified power supply and support stable electronic operation.<\/p>\n

    Direct-Drive Motor Control<\/strong>
    The control circuitry manages the electronic operation of the direct-drive motor system, supporting controlled sewing speed, acceleration response and needle-position functions where supported by the machine system.<\/p>\n

    Integrated Power Supply Section<\/strong>
    An onboard high-frequency transformer and associated circuitry provide the low-voltage power required by internal electronic control and logic circuits.<\/p>\n

    Voltage Protection Components<\/strong>
    Protection components such as varistors and diodes are incorporated into the board to help protect sensitive electronic circuits from electrical transients.<\/p>\n

    Multi-Pin Electrical Connections<\/strong>
    The board uses dedicated terminal connectors for connecting compatible machine wiring, sensors and control components. Always reconnect each plug according to the original machine wiring arrangement.<\/p>\n

    \u092e\u0936\u0940\u0928 \u0905\u0928\u0941\u0915\u0942\u0932\u0924\u093e<\/h3>\n
    \n
    \n\n\n\n\n\n\n\n\n\n
    \u092e\u0936\u0940\u0928 \u0915\u093e \u092a\u094d\u0930\u0915\u093e\u0930<\/th>\n\u0905\u0928\u0941\u0915\u0942\u0932<\/th>\n<\/tr>\n<\/thead>\n
    \u091c\u0948\u0915 \u091c\u0947\u0915\u0947-9100\u092c\u0940<\/td>\n\u0939\u093e\u0901<\/td>\n<\/tr>\n
    Jack JK-9100BS<\/td>\n\u0939\u093e\u0901<\/td>\n<\/tr>\n
    Jack JK-9100BP<\/td>\n\u0939\u093e\u0901<\/td>\n<\/tr>\n
    Single-Needle Direct-Drive Lockstitch Machine<\/td>\nYes, for the specified Jack models<\/td>\n<\/tr>\n
    TA1 \u091b\u093e\u0924\u093e \u0938\u093f\u0932\u093e\u0908 \u092e\u0936\u0940\u0928<\/td>\nNo \/ Not specified<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

    Part Number:<\/strong> 9950017800
    PCB Code:<\/strong> 904A
    \u092a\u0948\u0915 \u092e\u093e\u0924\u094d\u0930\u093e:<\/strong> 1 \u091f\u0941\u0915\u0921\u093c\u093e<\/p>\n

    The product listing from StitchSpares identifies 9950017800<\/strong> as a JK-9100B PCB and places it within the Jack 9100\/9100B\/9100BP\/9100BS industrial sewing-machine parts category.<\/p>\n

    Who Is This PCB For?<\/h3>\n

    This replacement control board is suitable for sewing-machine technicians, garment factories, tailoring workshops and maintenance professionals working with compatible Jack direct-drive lockstitch equipment.<\/p>\n

    It can be considered when the existing control board has an electronic fault or requires replacement. Because PCB versions can look similar, checking the part number, PCB code, connector arrangement and existing board<\/strong> before purchase is important.<\/p>\n

    \u0907\u0902\u0938\u094d\u091f\u093e\u0932\u0947\u0936\u0928 \u0917\u093e\u0907\u0921<\/h3>\n
      \n
    1. Switch off the sewing machine and disconnect it from the electrical supply.<\/li>\n
    2. Allow the machine electronics to discharge before opening the control-box area.<\/li>\n
    3. Photograph or label the existing wire and connector positions.<\/li>\n
    4. Remove the existing PCB carefully from its mounting points.<\/li>\n
    5. Compare the replacement board with the original board, including 9950017800 \/ 904A<\/strong> markings and connectors.<\/li>\n
    6. Install the replacement PCB in the same orientation.<\/li>\n
    7. Reconnect the electrical connectors according to the original arrangement.<\/li>\n
    8. Close the control-box assembly securely.<\/li>\n
    9. Power on the machine and test its basic functions.<\/li>\n
    10. If the machine does not operate correctly, switch off the power and have the wiring and PCB installation checked by a qualified technician.<\/li>\n<\/ol>\n

      \u0905\u0915\u094d\u0938\u0930 \u092a\u0942\u091b\u0947 \u091c\u093e\u0928\u0947 \u0935\u093e\u0932\u0947 \u092a\u094d\u0930\u0936\u094d\u0928\u094b\u0902<\/h3>\n

      Is 9950017800 the PCB for Jack JK-9100B?<\/h4>\n

      \u0939\u093e\u0901\u0964.<\/strong> \u092d\u093e\u0917 \u0938\u0902\u0916\u094d\u092f\u093e 9950017800<\/strong> is identified as the main control board associated with the Jack JK-9100B control box and 904A PCB designation. The available specialist listing specifically names the JK-9100B, 9950017800 and 904A PCB together.<\/p>\n

      What is the 904A PCB used for?<\/h4>\n

      The 904A PCB is used as the main electronic control board in the compatible Jack JK-9100B direct-drive lockstitch system.<\/strong> It handles electronic control functions within the machine’s control-box assembly and interfaces with the machine’s electrical components.<\/p>\n

      Does this PCB fit Jack JK-9100BS?<\/h4>\n

      It is specified for the Jack JK-9100BS within the supplied compatibility information.<\/strong> Before purchase, compare your existing board’s part number and PCB identification. If the markings differ, verify compatibility before installing a replacement.<\/p>\n

      Does this PCB fit Jack JK-9100BP?<\/h4>\n

      It is specified for the Jack JK-9100BP within the supplied compatibility information.<\/strong> Check the existing PCB’s 9950017800 \/ 904A<\/strong> identification and connector layout before ordering.<\/p>\n

      How do I know if I need to replace the control board?<\/h4>\n

      A PCB should only be replaced after the machine’s electrical fault has been properly diagnosed.<\/strong> Problems involving motor control, power supply, sensors or machine operation can have several causes. Check the wiring, connectors and other related components before assuming that the PCB itself is defective.<\/p>\n

      Is this PCB suitable for all industrial sewing machines?<\/h4>\n

      \u0928\u0939\u0940\u0902\u0964.<\/strong> This board is specified for compatible Jack JK-9100B-series direct-drive lockstitch machines.<\/p>\n

      Can I install the PCB myself?<\/h4>\n

      PCB replacement should preferably be performed by a qualified sewing-machine technician.<\/strong> Incorrect wiring or handling of powered electronic components can damage the board or machine. Disconnect the machine from power before inspection or installation.<\/p>","protected":false},"excerpt":{"rendered":"

      Jack 9100B 904A PCB Control Board, Part No. 9950017800, for compatible JK-9100B, JK-9100BS and JK-9100BP single-needle direct-drive lockstitch machines. Designed for electronic motor control, power regulation and machine control functions. Pack of 1 piece.<\/p>","protected":false},"featured_media":31473,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_yoast_wpseo_focuskw":"Jack 9100B 904A PCB control board","_yoast_wpseo_title":"Jack 9100B 904A PCB Control Board 9950017800 %%sep%% %%sitename%%","_yoast_wpseo_metadesc":"Buy Jack 9100B 904A PCB Control Board 9950017800 for compatible JK-9100B, JK-9100BS and JK-9100BP direct-drive lockstitch machines. 1 piece.","_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":"","_angie_page":false},"product_brand":[967],"product_cat":[766,1103,765,952],"product_tag":[3282,3283,3152,976,3281,3284,3285,3287,3286,2126,3271,3289,3130,3288],"class_list":["post-31435","product","type-product","status-publish","has-post-thumbnail","product_brand-jack","product_cat-9100-9100bp-9100bs-spare-parts","product_cat-sewing-machine-motherboard-and-chip","product_cat-jack-sewing-machine-spare-parts","product_cat-sewing-motor-and-spare-parts","product_tag-904a-pcb","product_tag-9950017800-pcb","product_tag-direct-drive-pcb","product_tag-industrial-sewing-machine-parts","product_tag-jack-9100b-pcb","product_tag-jack-control-board","product_tag-jack-jk-9100b-parts","product_tag-jack-jk-9100bp-parts","product_tag-jack-jk-9100bs-parts","product_tag-jack-sewing-machine-spare-parts","product_tag-lockstitch-machine-pcb","product_tag-pcb-replacement","product_tag-sewing-machine-control-board","product_tag-sewing-machine-electronics","first","instock","sale","shipping-taxable","purchasable","product-type-simple"],"acf":[],"yoast_head":"\nJack 9100B 904A PCB Control Board 9950017800 - Stitch Partner<\/title>\n<meta name=\"description\" content=\"Buy Jack 9100B 904A PCB Control Board 9950017800 for compatible JK-9100B, JK-9100BS and JK-9100BP direct-drive lockstitch machines. 1 piece.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/stitchpartner.com\/hi\/product\/jack-9100b-904a-pcb-control-board-9950017800\/\" \/>\n<meta property=\"og:locale\" content=\"hi_IN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jack 9100B 904A PCB Control Board 9950017800 - Stitch Partner\" \/>\n<meta property=\"og:description\" content=\"Buy Jack 9100B 904A PCB Control Board 9950017800 for compatible JK-9100B, JK-9100BS and JK-9100BP direct-drive lockstitch machines. 1 piece.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/stitchpartner.com\/hi\/product\/jack-9100b-904a-pcb-control-board-9950017800\/\" \/>\n<meta property=\"og:site_name\" content=\"Stitch Partner\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/467613100111433\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-03T11:42:18+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/stitchpartner.com\/wp-content\/uploads\/2026\/09\/jack-9100b-904a-pcb-control-board-9950017800.jpg.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1040\" \/>\n\t<meta property=\"og:image:height\" content=\"1040\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0905\u0928\u0941\u092e\u093e\u0928\u093f\u0924 \u092a\u0922\u093c\u0928\u0947 \u0915\u093e \u0938\u092e\u092f\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 \u092e\u093f\u0928\u091f\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Jack 9100B 904A PCB Control Board 9950017800 - 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