White lines, bands or ribbing across the page

Colours are light or unclear on the whole page

Vertical streaks in a light background

White spots or hollow print

Toner scatter or toner stain

All one colour

Uneven density appears periodically across the page

Wrinkle

Offset image

Poor fixing

Curled or wavy

Envelope creases

White streaks or bands down the page

Coloured streaks or bands down the page

Coloured lines across the page

Completely blank or some colours are missing

Coloured spots at 94mm (3.7in.)

Coloured spots at 30mm (1.2in.)

Colour misregistration

Uneven density or faded

1. The drum unit may be damaged. Put in a new drum unit as follows:
   
   1. Click here to print the chart. [185KB/ PDF]
   2. Compare your printed document with the printed chart to identify the color of the drum unit causing the problem.
   3. Replace the drum unit of the colour.
      Please refer to the instructions, "How do I replace the drum unit?".

1. Make sure Toner Save mode is off in the control panel of the machine or the printer driver.
   Please refer to the instructions, "How can I turn the Toner Save Mode on or off?".
2. Make sure that you choose the correct media type in the printer driver or in the machine's Paper Type menu setting.
3. Take out all the drum unit and toner cartridge assemblies and then shake all four toner cartridges gently.
   Please refer to the instructions, "How do I replace the toner cartridge?".
4. Wipe the windows of all four LED heads with a dry lint free soft cloth.
   Please refer to the instructions, "How do I clean the LED head?".
5. Perform the print calibration to improve the colour density.
   Please refer to the instructions, "How do I improve the color density?".

1. Clean the LED heads as follows:
   
   1. Click here to print the chart. [345KB/ PDF]
   2. Compare your printed document with the printed chart to identify the colour of the LED head causing the problem.
   3. Wipe the windows of the LED head with a dry lint free soft cloth.
      Please refer to the instructions, "How do I clean the LED head?".

1. Clean the drum unit as follows:
   
   1. Click here to print the chart. [345KB/ PDF]
   2. Compare your printed document with the printed chart to identify the colour of the drum unit causing the problem.
   3. Clean the drum unit of the colour.
      Please refer to the instructions, "How do I clean the drum unit?".
2. Make sure that the media type settings in the printer driver and in the machine's Paper Type menu matches the type of paper you are using. We recommend trying to change Thick Paper or Thicker Paper mode in the printer driver, and Thick or Thicker in the machine's Paper Type menu setting.
3. Check the machine's environment. Conditions such as high humidity can cause white spots or hollow print.
   Temperature: 10ºC to 32.5ºC (50ºF to 90.5ºF)
   Humidity: 20% to 80% (without condensation)

1. Check the machine's environment. Conditions such as high humidity can cause white spots or hollow print.
   Temperature: 10ºC to 32.5ºC (50ºF to 90.5ºF)
   Humidity: 20% to 80% (without condensation)
2. The toner cartridge may be damaged. Put in a new toner cartridge as follow:
   
   1. Click here to print the chart. [345KB/ PDF]
   2. Compare your printed document with the printed chart to identify the colour causing the problem.
   3. Replace the toner cartridge of the colour.
      Please refer to the instructions, "How do I replace the toner cartridge?".
3. If the problem continues, the drum unit may be damaged. Put in a new drum unit of the colour causing the problem.
   Please refer to the instructions, "How do I replace the drum unit?".

1. The drum unit may be damaged. Put in a new drum unit as follows:
   
   1. Click here to print the chart. [345KB/ PDF]
   2. Compare your printed document with the printed chart to identify the colour of the drum unit causing the problem.
   3. Replace the drum unit of the colour.
      Please refer to the instructions, "How do I replace the drum unit?".

1. Perform the print calibration to improve the colour density.
   Please refer to the instructions, "How do I improve the colour density?".
2. The toner cartridge may be damaged. Put in a new toner cartridge as follow:
   
   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.
      Please refer to the instructions, "How do I replace the toner cartridge?".
3. If the problem continues, the drum unit may be damaged. Put in a new drum unit of the colour causing the problem.
   Please refer to the instructions, "How do I replace the drum unit?".

1. Make sure that the media type settings in the printer driver and in the machine's Paper Type menu matches the type of paper you are using.
2. Make sure that two grey levers inside the back cover are in the up position.
   

   

    
3. Check the machine's environment. Conditions such as high humidity can cause white spots or hollow print.
   Temperature: 10ºC to 32.5ºC (50ºF to 90.5ºF)
   Humidity: 20% to 80% (without condensation)
4. The drum unit may be damaged. Put in a new drum unit as follows:
   
   1. Click here to print the chart. [345KB/ PDF]
   2. Compare your printed document with the printed chart to identify the colour of the drum unit causing the problem.
   3. Replace the drum unit of the colour.
      Please refer to the instructions, "How do I replace the drum unit?".

1. Wipe the windows of all four LED heads with a dry lint free soft cloth.
   Please refer to the instructions, "How do I clean the LED head?".
2. Clean all four drum units.
   Please refer to the instructions, "How do I clean the drum unit?".
3. The toner cartridge may be damaged. Put in a new toner cartridge as follows:
   
   1. Click here to print the chart. [185KB/ PDF]
   2. Compare your printed document with the printed chart to identify the colour of the toner cartridge causing the problem.
   3. Replace the toner cartridge of the colour.
      Please refer to the instructions, "How do I replace the toner cartridge?".

1. Clean all four corona wires (one for each colour) inside the drum unit by sliding the green tab. After completing the cleaning, make sure the corona wire cleaners are at their home positions.
   Please refer to the instructions, "How do I clean the corona wire?".
2. The toner cartridge may be damaged. Put in a new toner cartridge as follow:
   
   1. Click here to print the chart. [185KB/ PDF]
   2. Compare your printed document with the printed chart to identify the colour causing the problem.
   3. Replace the toner cartridge of the colour.
      Please refer to the instructions, "How do I replace the toner cartridge?".
3. If the problem continues, the drum unit may be damaged. Put in a new drum unit of the colour causing the problem.
   Please refer to the instructions, "How do I replace the drum unit?".

1. The toner cartridge may be damaged. Put in a new toner cartridge as follow:
   
   1. Click here to print the chart. [345KB/ PDF]
   2. Compare your printed document with the printed chart to identify the colour causing the problem.
   3. Replace the toner cartridge of the color.
      Please refer to the instructions, "How do I replace the toner cartridge?".
2. If the problem continues, the drum unit may be damaged. Put in a new drum unit of the colour causing the problem.
   Please refer to the instructions, "How do I replace the drum unit?".

1. The toner cartridge may be damaged. Put in a new toner cartridge as follow:
   
   1. Click here to print the chart. [345KB/ PDF]
   2. Compare your printed document with the printed chart to identify the colour causing the problem.
   3. Replace the toner cartridge of the colour.
      Please refer to the instructions, "How do I replace the toner cartridge?".
2. If the problem continues, the drum unit may be damaged. Put in a new drum unit of the colour causing the problem.
   Please refer to the instructions, "How do I replace the drum unit?".

1. The drum unit may have glue from a label stuck on the drum surface. Clean the drum unit as follow:
   
   1. Click here to print the chart. [345KB/ PDF]
   2. Compare your printed document with the printed chart to identify the colour causing the problem.
   3. Clean the drum unit of the colour.
      Please refer to the instructions, "How do I clean the drum unit?".
2. If the problem continues, the drum unit may be damaged. Put in a new drum unit of the colour causing the problem.
   Please refer to the instructions, "How do I replace the drum unit?".

1. The toner cartridge may be damaged. Put in a new toner cartridge as follow:
   
   1. Click here to print the chart. [345KB/ PDF]
   2. Compare your printed document with the printed chart to identify the colour causing the problem.
   3. Replace the toner cartridge of the colour.
      Please refer to the instructions, "How do I replace the toner cartridge?".

1. Make sure that the machine is on a solid level surface.
2. Perform the auto colour registration using the control panel. If the problem continues, perform the manual color registration using the control panel.
   Please refer to the instructions, "How do I adjust the print position of each colour?".
3. The drum unit may be damaged. Put in a new drum unit as follow:
   
   1. Click here to print the chart. [345KB/ PDF]
   2. Compare your printed document with the printed chart to identify the colour causing the problem.
   3. Replace the drum unit of the colour.
      Please refer to the instructions, "How do I replace a drum unit?".
4. If the problem continues, the belt unit may be damaged. Put in a new belt unit.
   Please refer to the instructions, "How do I replace the belt unit? ".

1. Fully open the top cover and then close it again.