Lexmark 4I3 - Manual (Page 195)

Installing the Ribbon Cartridge
To install a new ribbon cartridge, follow these steps:
1. Get a new ribbon cartridge and remove it from the package.
2. Remove the yellow clip from the ribbon.
3. Turn the blue ribbon advance knob clockwise to take up slack
in the ribbon. If the ribbon does not move, contact your place of
purchase and replace the ribbon cartridge.
R e m o v e Ye llo w C lip
B lu e R ib b o n A d v a n c e K n o b
Chapter 4. Replacing Your Ribbon 4-5