Oki C3520 User Manual page 33

8. For face up printing, make sure the face up (rear) stacker
(1) is open and the paper support (2) is extended. Paper
is stacked in reverse order and tray capacity is
approximately 10 sheets, depending on paper weight.
9. Always use the face up (rear) Stacker for heavy paper
(card stock etc.).
Do not open or close the rear paper exit while printing
as it may result in a paper jam.
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CAUTION!
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