The Heidelberg part number 00.781.4 is a critical component of the CD102 and SM102 printing machines, as well as the SM74 series. This power supply board, identified by the EXK230 designation, is essential for the reliable operation of these industrial printing systems. It ensures that the machines receive the necessary electrical power to function efficiently, contributing to the overall performance and longevity of the equipment. This board is a key element in maintaining the high standards of quality and productivity expected in industrial printing environments.