Referbished CoPrint3D Chromahead Control Board. This is the upgraded version board that includes the runout sensor connection. Note - Failed TVS diode may have been removed from this unit. Removal of TVS diode does not effect operation of unit. Please always power down the KCM Module before plugging or unplugging the chromahead to prevent damage to the unit. Authorised Co-Print referbished parts supplier - please get in touch if there are any Co Print specific parts you require.