Is a malfunctioning circuit motherboard causing sudden shutdowns, unresponsive buttonhole cycles, or stubborn error codes on your factory floor? The Jack 781D Main Board is the definitive factory-original replacement component designed to bring your high-speed electronic buttonhole machine back to original manufacturing specifications.

As the central processing unit of your equipment, Jack 781D Main Board ensures flawless communication between your foot pedal controls, the integrated direct-drive servo motor, and the automated knife-dropping mechanisms.

Key Features & Technical Details

• 100% Genuine Factory Part: Provides seamless hardware and firmware integration, completely eliminating the compatibility glitches common with generic aftermarket electronics.

• Advanced Circuit Protection: Built with high-grade solid-state capacitors designed to absorb unstable factory power grid surges and prevent secondary electronic shorts.

• Plug-and-Play Installation: Engineered with standardized multi-pin terminal ports to make a direct motherboard swap quick and painless, drastically cutting down on workshop downtime.

• Optimized Cycle Control: Delivers perfect mechanical synchronization for neat, clean, and repeatable buttonhole stitch patterns across heavy and light textiles alike.

Technical Specifications

• Component Type: Industrial Sewing Machine Main Circuit Board (Motherboard / PCB)

• Compatible Machine Model: Jack JK-781D Series

• Machine Type: Industrial Electronic Button Hole Machine

• Condition: Brand New, Genuine Jack Replacement Part