Oki MB472dn User Manual page 746

Note
Toner may remain on the reverse side of the toner cover. Use care not to stain other parts when removed.
Use extra care when handling the image drum (the green cylinder), because it is fragile.
Do not expose the image drum to direct sunlight or strong light (approximately 1,500 lux or more). Do not leave the image
drum for 5 minutes or more even under room light.
Do not leave the image drum for 1 hour or more, even if it is covered with black paper.
Memo
Dispose of the toner cover as incombustible waste.
11.
Install a new toner cartridge.
For the installation method, refer to steps 9 to 11 in
12.
Close the top cover.
13.
Close the scanner unit.
Memo
"Replacing the Toner Cartridge".
745