Oki C3520 - Manual (Page 111)

Troubleshooting > 111
13. If you are not using the rear stacker, close it once paper
has been removed from this area.
14. Press the front cover release and pull open the front
cover.
15. Check inside the cover for sheets in this area and remove
any that you find, then close the cover.
16. Pull out the Cassette Tray and ensure that all paper is
stacked properly, is undamaged, and that the paper
guides are properly positioned against the edges of the
paper stack. When satisfied, replace the tray.
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