Commodore MPS-801 User Manual page 12

6.
b . Remove the ribbon cassette from the packet and place it carefully
in front of you.
c. Look at the cassette. You will notice that one side has a ribbon
advance knob.
d. Rotate ribbon advance knob in the direction of the arrow until
all the slack is taken out of the ribbon. (See 2.2)
2.2
e. Pull the paper thickness adjusting lever toward the front of the
printer until it stops. (pull it while pushing outward.) (See 2.12)
f.
Place the rib bon cassette on the carrier until. Be sore that the
ribbon is between the print head and the platen. (See 2.3)
g. Push down the left side of the ribbon cassette with your finger.
Be sure that the left claw snaps into the cassette supporter of the
carrier unit. (See 2.3)