Troubleshooting- 406 -For the error code 652The error code [652] is displayed only in B842.1 Pull out the paper cassette of Tray 1 by holding its handle until it stops, raise the paper cassettea little by holding its both sides, and take it out.2 Remove the jammed paper.3 Insert the paper cassette into the main unit from slightly above and install it back to its originalposition.If you return the paper cassette to the main unit by force, the paper stopper may shift.

Oki COREFIDO B822dn User Manual