Epson LQ-2170 User Manual page 32

6. Lift the ribbon guide and insert it firmly over the metal pins
behind the print head. Press down on the guide until it clicks
into place. Make sure the ribbon is not twisted or creased and
that it is in place behind the print head. Turn the
ribbon-tightening knob to remove any slack in the ribbon.
7. Slide the print head from side to side to make sure it moves
smoothly.
Setting Up the Printer 1-7