Canon LBP7210Cdn Manual page 376

Hold the toner cartridges properly.
When handling the toner cartridges, hold them properly as shown in the figure. Do not place it
vertically or upside-down.
When removing a toner cartridge which is being used from the printer
Immediately attach the drum protective cover
*
protective bag , or wrap it with a thick cloth.
* The packing material in which the toner cartridge is originally packed.
Replace a toner cartridge with that of the same color.
When replacing a toner cartridge, be sure to replace the toner cartridge of the same color.
Other precautions
Do not expose the toner cartridges to direct sunlight or strong light.
Do not disassemble or modify the toner cartridges.
Condensation (water droplets on the inside or outside) may form on the toner
cartridges when they are brought into an environment with a sudden change in
temperature or humidity.
When moving a new toner cartridge to a location with change in temperature, leave
the cartridge in the protective bag at the new location for two or more hours to
allow it to adjust to the new temperature.
Keep toner cartridges away from products that generate magnetic waves, such as a
computer or computer display.
*
to the toner cartridge and place it into the