Oki C 9400 - Manual (Page 312)

3. Lift out the appropriate image drum (corresponding to XXX on the display) and discard it
and the toner cartridge in accordance with local regulations.
Caution!
Avoid touching the green surface of the image drum.
Be careful not to set the cartridge down on anything that might scratch the
green surface.
Keep the drum from exposure to direct sunlight and don't let it sit in room light
for more than 5 minutes.
4. Unpack the new drum, then remove the protective sheet.
5. Remove the tape.
311