Canon imageCLASS MF3010 VP Multifunction Monochrome Laser Printer - Manual (Page 216)

Hold the toner cartridges properly.
When handling the toner cartridge, hold it properly, as shown in the illustration below. Do not stand it
vertically or hold it upside down.
Do not touch the toner cartridge memory (A) or the electrical contacts (B).
This may result in damage to the cartridge.
Do not open the drum protective shutter (A).
Print quality may deteriorate if you touch or damage the drum inside the drum protective shutter (A). Do
not touch or open the drum protective shutter (A).
When pulling out the sealing tape
● Do not pull the sealing tape at an angle or sideways. If the tape breaks, the tape may not be pulled out
completely.
Maintenance
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