Colors or Stains Appear on the Background of Printouts

Troubleshoot by checking in the following order:
Are White Areas Lightly Colored?
Setting [Prevent Fogging] to [Mode 1] may solve the problem. If that does not work, set the item to [Mode 2] and [Mode 3] in that order.
Touch Panel Model
[Home] screen on the operation panel [Menu] [Adjustment/Maintenance] [Adjust Image Quality] [Special Processing] [Prevent Fogging] select the mode.
Black and White LCD Model
[Home] screen on the operation panel  [Menu]    [Adjustment/Maintenance]    [Adjust Image Quality]    [Special Processing]    [Prevent Fogging]    [Mode 1], [Mode 2], or [Mode 3]  
* When this setting is enabled, the print density may decrease.
Check the Remaining Amount of Toner in the Toner Cartridges.
Check the remaining amount of toner in the toner cartridges, and replace any toner cartridges, as needed.
Checking the Remaining Amount of Consumables
Replacing the Toner Cartridges
* 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. If the condition persists even after replacing the toner cartridge indicated to have a low amount of toner, it is recommended to replace the other toner cartridges as well.
8K6C-09S