Check the following points to resolve the issue:

1. Perform the calibration using the machine's display.
   > Click here to see how to carry out calibration.
2. Adjust the copy density and contrast if you are copying.
3. Clear the Improve Grey Colour check box in the printer driver.
4. Identify the colour causing the issue and put in a new toner cartridge.
   
   To identify the colour 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 colour that is uneven.
   3. Replace the toner cartridge of the colour.
       > Click here to see how to replace the toner cartridge.
5. Install a new drum unit.
    > Click here to see how to replace the drum unit.