Maintenance and inspections – Canon Color imageCLASS MF9280Cdn User Manual
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Important Safety Instructions
Confirm that the power plug or power connecter is 
inserted completely after moving the machine. Failure 
to do so can result in an overheating and fire.
Do not drop paper clips, staples, or other metal objects 
inside the machine. Also, do not spill water, liquids, 
or other flammable substances (alcohol, benzene, 
paint thinner, etc.) inside the machine. If these items 
come into contact with a high-voltage area inside the 
machine, this may result in a fire or electrical shock. If 
these items are dropped or spilled inside the machine, 
immediately turn off the power switches of the 
machine and computer and disconnect the interface 
cable if it is connected. Then, unplug the power plug 
from the AC power outlet and contact your local 
authorized Canon dealer.
When plugging or unplugging a USB cable when the 
power plug is plugged into an AC power outlet, do not 
touch the metal part of the connector, as this can result 
in electrical shock.
Do not place heavy objects on the machine. The object 
or the machine may fall, resulting in personal injury.
Turn off the power switch when the machine will not 
be used for a long period of time, such as overnight. 
Turn off the machine and unplug the power plug if the 
machine will not be used for an extended period of 
time, such as for several days.
Open or close covers and install or remove cassettes 
gently and carefully. Be careful not to hurt your fingers.
Keep your hands and clothing away from the roller in 
the output area. Even if the machine is not printing, 
the roller may suddenly rotate and catch your hands or 
clothing, resulting in personal injury.
The output slot is hot during and immediately after 
printing. Do not touch the area surrounding the output 
slot, as this may result in burns.
Printed paper may be hot immediately after being 
output. Be careful when removing the paper and 
aligning the removed paper, especially after continuous 
printing. Failure to do so may result in burns.
When performing copy with a thick book placed on 
the platen glass, do not press the feeder forcefully. 
This may damage the platen glass and cause personal 
injury.
Be careful not to drop a heavy object, such as a 
dictionary, on the platen glass. This may damage the 
platen glass and cause personal injury.
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Close the feeder gently so as not to catch your hand. 
This may result in personal injury.
The laser beam can be harmful to human bodies. The 
laser beam is confined in the laser scanner unit by a 
cover, so there is no danger of the laser beam escaping 
during normal machine operation. Read the following 
remarks and instructions for safety.
Never open covers other than those indicated in this 
manual.
Do not remove the caution label attached to the 
cover of the laser scanner unit.
If the laser beam should escape and enter your eyes, 
exposure may cause damage to your eyes.
If you operate this machine in manners other than 
the control, adjustment, and operating procedures 
prescribed in this manual, this may result in hazardous 
radiation exposure.
Maintenance and Inspections
When cleaning the machine, turn off the machine and 
computer, and unplug the interface cables and power 
plug. Failure to do so can result in a fire or electrical 
shock.
Unplug the power plug from the AC power outlet 
periodically and clean the area around the base of the 
power plug’s metal pins and the AC power outlet with a 
dry cloth to remove all dust and grime. In damp, dusty, 
or smoky locations, dust can build up around the power 
plug and become damp, which can cause a short 
circuit, resulting in a fire.
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