Ensure reliable communication with the SUB-B control board using the genuine Epson Relay SUB-B Harness W-971 (Ref. 219, 2228311). Designed for the Epson SureColor F9530 and F9530H printers, this replacement relay harness provides secure electrical connectivity and stable signal transmission between the SUB-B board and other critical printer components, ensuring smooth operation, dependable performance, and consistent print quality. Ideal for replacing damaged or worn wiring harnesses in professional dye-sublimation printing environments. This genuine Epson spare part offers a precise fit, dependable performance, and long-lasting durability.