L-6534VW Operation Guide Basic Operations P Wind up the substrate to remove any slack on the unwinder side. c Important: Wind up the substrate to remove any slack. When installing the electrode cartridges in the previous position, if the substrate is slack, the substrate and electrode cartridge could be damaged. Q Install the electrode cartridge in its previous position. R Close the unwinder roll cover on the press, and the front cover and the top cover on the corona treater. 112