Oki ES3640MFP Service & Troubleshooting Manual page 83

390： Paper Jam
Condition
This is a Multi Purpose Tray mis-feed.
1. Even after the printer tries hopping operation three times, MPT HP sensor does not change to ON-state.
2. Even after the printer tries hopping operation three times, IN2 sensor does not change to ON-state, then, OFF-state.
The printer stops printing immediately when the jam occurs.
Cause
1. Hopping roller or Registration roller cannot transport paper because they have become dirty with paper powder, etc.
2. A piece of paper, foreign substance, etc., got stuck in the IN2 or MPT HP sensor lever.
3. IN2 or MPT HP sensor motion failure
How to remove the jammed paper
Remove the paper that was not loaded, in the direction shown - Remove all the paper from the Multi Purpose Tray,
then, align edges and reset them in the Multi Purpose Tray.
If you have been performing continuous printing, some paper may still remain in other areas. After opening and
closing the cover, if other error code is displayed, follow the jam clearance method of that code.
Check Points
Frequent Jams:
Check if the Hopping rollers are dirty/need replacement
Open the side cover - Open the paper supporter - Slide the paper guide to the center
Lift the white lever of the arm (left side) that supports MP Tray.
Lift MP tray slightly with left hand, move the lever inward with right hand, and free it.
Free the lever on the right in the same manner as above - Lift the cover toward the printer main unit - Slide the paper guide
to the outside.
Put finger in the hole under the roller and open the and clean or replace the three rollers