AS-4000 User’s Guide Basic Operations G When it is in the correct position, tighten the screw on the rear substrate guide to fix it in place. H Align the front substrate guide to the width of the substrate. When it is in the correct position, tighten the screw to fix it in place. I Make sure that the substrate passes correctly between the base of the registration mark presser and the roller. Once this is done, continue with the substrate replacement procedure to load the substrate. 21