Brother HL-J6000DW Online User's Manual page 261

8. If your LCD error message was [Jam Front/Rear] or [Repeat Jam Front/Rear], do the following:
a. Open the Jam Clear Cover (1) at the back of the machine.
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b. Make sure you look carefully inside for jammed paper and slowly pull it out of the machine.
c. Close the Jam Clear Cover. Make sure the cover is closed completely.
9. If your LCD error message was [Jam Front/MP Tray] or [Repeat Jam Front/MP Tray], make sure
you look carefully inside the MP tray for jammed paper. Push the release lever (1) towards the back of the
machine, and then slowly pull the jammed paper out of the MP tray.
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