Oki ES3640MFP Service & Troubleshooting Manual page 78

380: Paper Jam
Condition
Paper jam that occurred while the paper was being transported by the registration roller after it was hopped normally.
1. The IN2 sensor does not change to ON-state within the predefined time after the registration roller started to rotate.
2. The WR sensor does not change to ON-state within the predefined time after the IN2 sensor changed to ON-state.
3. When the printer is turned on or the cover is opened and closed, IN1 or 2 is ON-state.
The printer stops printing immediately when the jam occurs.
Cause
1. Registration rollers cannot transport paper because they have become dirty with paper dust, toner, etc.
2. A piece of paper, foreign substance, etc.
How to remove the jammed paper
Open the tray1 side cover - Pull the jammed paper in the direction shown - Close the tray1 side cover
Pull the opener and open the side cover - Remove the jammed paper and close the side cover.
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
Open the tray1 side cover and the side cover, and check the following areas and clean them.