Check the listing for details. DUPLO DC-616 MAIN PCB BOARD. Condition: New – Open box. Listed at 350.00 USD. The DUPLO DC-616 Main PCB Board is a key component in bindery and finishing equipment used in the printing and graphic arts industry. This printed circuit board controls various functions and settings to ensure precision and accuracy in binding and stitching tasks. It is a crucial part of machines that help professionals in the industry to efficiently and effectively produce high-quality printed materials such as books, magazines, and documents.