Oki LE810DT User Manual page 17

8. Adjust the media sensor to compensate for irregularities in the media (i.e.:
notch, tag hole, gap, perforation or markings). The proper position will be
media-dependent. To properly adjust the sensor position, loosen the green
Sensor Adjust Knob located on the bottom side of the Media Transport Assembly
and move the sensor in ¼-inch increments (or finer) until the sensor error is
cleared. After the error is cleared, retighten the Sensor Adjust Knob.
9. Pull out the bottom of the Outside Media Guide so that it is upright, then push
the guide inward until it barely contacts the outside edge of the media.
LE810DT User's Guide 17