Epson U200B - TM Color Dot-matrix Printer Operator's Manual page 20

Note:
Make sure the ribbon is installed between the print head and the
platen without wrinkles or creases.
5. Turn the ribbon cassette's knob 5 or 6 times in the direction of
the arrow again to take up any slack in the ribbon.
6. Close the auto cutter by using the tab.
7. Close the printer cover.
1–12 Setting Up the Printer