Canon imageCLASS MF266dn II User Manual page 576

Check the Remaining Amount of Toner in the Drum Cartridge.
Check the remaining lifetime of the drum cartridge. If the remaining lifetime is short, replace the drum
cartridge.
Checking the Remaining Amount of Consumables(P. 540)
Replacing the Drum Cartridge(P. 536)
* Depending on the usage condition of the machine, the actual remaining amount of toner may be lower than
indicated or the parts may be deteriorated (may be damaged or may malfunction). It is recommended to
replace the drum cartridge with a new one.
Are You Using the Machine in a Humid Environment?
Setting [High Humidity Mode] to [On] may solve the problem.
Touch Panel Model
[Home] screen on the control panel
[Special Processing] [High Humidity Mode]
5 Lines LCD Model
on the control panel
Processing] [High Humidity Mode]
* Setting this to [On] may blur images and text in an environment with low humidity.
Are You Using the Machine in an Environment with Sudden Temperature Changes?
Sudden temperature changes can create condensation, which can result in faded or blurry images and text.
Setting [Control Condensation] to [On] may solve the problem.
Touch Panel Model
[Home] on the control panel
Condensation] [On]
5 Lines LCD Model
on the control panel
Condensation]
* During condensation removal, a blank sheet of paper may be output without being printed correctly. If you
set this to [On], you can set whether to restrict printing.
Is the Machine Installed in a Location Subject to Strong Wind Such as from an Air
Conditioner?
If so, adjust the air direction and volume of the air conditioner.
If that does not work, setting [Switch Paper Feed Method] to [Print Side Priority] may improve the problem.
Touch Panel Model
[Home] on the control panel
Paper Feed Method] select the paper source
5 Lines LCD Model
Troubleshooting
[Menu] [Adjustment/Maintenance]
[On]
[Adjustment/Maintenance]
[Menu] [Adjustment/Maintenance]
[Adjustment/Maintenance]
[On]
[Menu] [Function Settings]
[Print Side Priority]
567
[Adjust Image Quality]
[Adjust Image Quality]
[On]
[Maintenance]
[Maintenance]
[Common] [Paper Feed Settings]
[Special
[Control
[Control
[Switch