Ensure reliable communication between the SUB-Z and SUB-B control boards with the genuine Epson Relay SUB-Z / SUB-B Harness W-178 (Ref. 218, 2227740). Designed for the Epson SureColor F9530 and F9530H printers, this replacement relay harness provides secure electrical connectivity and stable signal transmission between critical internal control boards, ensuring smooth printer 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.