Dell C3760dn Color Laser Printer User Manual page 341

2 Turn the waste toner box lock lever 90-degrees counterclockwise to unlock the waste toner box.
3 Grasp the handle on the waste toner box and pull it out making sure to hold it upright so that the waste toner does
not spill out.
CAUTION:
Take care not to drop the waste toner box while you are removing it.
CAUTION:
After removing the waste toner box, do not touch the parts shown in the illustration. Toner can dirty or stain
your hands.
4 Stand the removed waste toner box upright on a level surface.
WARNING:
Never lay the waste toner box on its side as this may cause its malfunction or toner spills.
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Maintaining Your Printer