Fujitsu DL7600 User Manual page 38

SETTING UP
2-8
5. Remove the ribbon cassette from its package. Push in the two ribbon
release tabs. The tabs snap into the cassette and the ribbon feed
mechanism engages.
Preparing the ribbon cassette
6. Remove the ribbon guide (green part) from the ribbon cassette.
Don't turn the ribbon feed knob before installation.
Preparing the ribbon cassette
User's Manual