Oki B412dn User Manual page 220

Do not expose the image drum to direct sunlight or strong light (approximately 1,500 lux or more). Even under room
lighting, when leaving the image drum cartridge for 5 minutes or more, put sheets of paper over it to shield it from the light.
Even with sheets of paper put over the image drum cartridge, do not leave it for one hour or more.
3.
Remove the jammed paper if necessary.
If the top end of the paper is visible
Hold the top end of the jammed paper, and then pull the paper out gently.
If the top end of the paper is visible behind the transparent resist guide
Turn the resist guide (1) toward the fuser unit side, hold the top end of the jammed paper (2), and then pull the paper out
gently.
If neither the top end nor the bottom end of the paper is visible
Slide the jammed paper in the direction of the arrow, hold the top end of the paper, and then pull the paper out gently.
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