Check the following points to resolve the issue:

1. Perform the calibration using the Touchscreen/Control Panel or the printer driver.
   Click here to see the details of how to carry out calibration.
2. Clear the Improve Gray Color check box in the printer driver.
3. Identify the color causing the problem and put in a new toner cartridge.
   
   To identify the color of the toner cartridge or replace toner cartridge, follow the steps below:

    

   1. Click here to print the chart. [345KB/ PDF]
   2. Compare your printed document with the printed chart to identify the color that is uneven.
   3. Replace the toner cartridge of the color. Click here to see the details of how to replace the toner cartridge.
4. Install a new drum unit. Click here to see the details of how to replace the drum unit.