IBM 3 User Manual page 303

into place.
Ribbon
Lift
Assembly
5. While turning the ribbon advance knob, press the left side of the ribbon
cartridge down until it snaps into place. Then press the right side down until
is snaps into place.
6. Turn the ribbon advance knob again in the direction of the arrow to take up
slack in the ribbon.
Ribbon
Shield
Chapter 19. Supplies, Optional Features, and Maintenance
293