Oki C330 - Manual (Page 93)

93 – C330/C530 Replacing Consumables and Maintenance
2. Holding it by its handles, lift the image drum assembly,
complete with toner cartridges, up and out of the printer
Place the assembly in a safe place away from direct sources
of heat, and cover it to protect it from exposure to light.
CAUTION!
The green image drum surface at the base of each
cartridge is very delicate and light sensitive. Do
not touch it and do not expose it to normal room
light for more than 5 minutes. If the drum unit
needs to be out of the printer for longer than this,
please wrap the cartridge inside a black plastic
bag to keep it away from light. Never expose the
drum to direct sunlight or very bright room
lighting.