Oki B6200 Series User Manual page 52

Cover B:
Remove the rear tray (if fitted) when opening the back cover.
Open Cover B (For B6300, raise the lever as shown in the diagram and
open cover B (1)). After opening cover B, hold the part marked with a *,
open the cover of the fuser unit (2) and remove any jammed paper.
Cover C (Duplex Unit):
Remove the rear tray (if fitted) when opening the back cover.
Push up the lever (1) to open the duplex unit cover.
NOTE
NOTE
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