Epson TM-290-II Operator's Manual page 15

If the ribbon is slack, turn the ribbon cassette's feed knob in
the direction of the arrow.
Insert the ribbon cassette in the printer.
Reinstall the printer cover. Insert the tabs on the upper side of
the cover first, then place the bottom in place with a click.
CAUTIONS:
• Before installing the ribbon cassette, make sure the RELEASE
light is turned on.
• Make sure the ribbon is not creased or twisted.
• Turn the ribbon feed knob in the direction of the arrow.
• To remove the ribbon cassette, pull the protruding tab on the
cassette toward you.
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