IBM Personal Computer AT Manual To Operations page 114

5
Push down on the top of the ribbon (where it
goes through the print-head ribbon guide wires)
to clear it from under the curved guides.
Pull
the
ribbon sightly forward, then up to remove it
from the print-head ribbon guide.
Ribbon Guide Wires
6
Lift the ribbon from around the left and right
guide posts.
Guide Posts
1-4 Color Printer