Epson C11C560111 - PLQ 20 B/W Dot-matrix Printer User Manual page 40

11. Put the ribbon guide at the bottom of the print head and push
it up until it clicks.
12. Turn the ribbon-tightening knob to help feed the ribbon into
place.
c
30
Replacing the Ribbon Cartridge
Caution:
The ribbon should not be twisted or creased.