FUJITSU DL9300 - Manual (Page 150)

Maintenance
User's Manual 6-5
MAINTENANCE
Munting pin
5. Remove the new ribbon cartridge from its package. Push in
the sides of the two ribbon release tabs. The tabs will snap into
the cartridge and the ribbon feed mechanism will engage.
Turn the ribbon feed knob clockwise to be sure that it feeds
properly.
Ribbon release tabs
Ribbon feed knob
Turn clockwise
to tighten.
Ribbon release lever
Preparing the new ribbon cartridge