MFC-L8850CDW

FAQs & Troubleshooting

FAQs & Troubleshooting

Clean the drum unit

If your printout has black or white dots or other repeating marks at 94 mm (3.7 in.) intervals, the drum may have foreign material, such as glue from a label, stuck on the drum surface. Follow these steps below to clean the drum unit.
 

  1. Make sure the machine is in Ready mode.
  2. Press Settings(Settings).
  3. Press All Settings.
  4. Press the Up or Down arrow key to display Print Reports.
  5. Press Print Reports.
  6. Press the Up or Down arrow key to display Drum Dot Print.
  7. Press Drum Dot Print.
  8. The Touchscreen displays Press [OK]. Press OK.
  9. The machine will print the Drum Dot Check Sheet. Then press Home(Home).
  10. Press and hold down Power_key(Power On/Off) to turn off the machine.
  11. Press the front cover release button and pull open the front cover.
    Open_front_cover
  12. Hold the blue handle of the drum unit. Pull the drum unit out until it stops.
    Pull_drum
  13. Turn the blue lock lever (1) at the left of the machine counterclockwise to the release position. Holding the blue handles of the drum unit, lift the front of the drum unit and remove it from the machine.
    Lock_lever_counerclockwise
  14. Hold the handle of the toner cartridge and gently push it forward to unlock it. Then pull it out of the drum unit. Repeat this for all the toner cartridges.
    Pull_toner
  15. Turn the drum unit over by holding the blue handles. Make sure that the drum unit gears (1) are on the left hand side.
    Drum_gear
  16. Read following information from the drum dot check sheet.
    • Dot Color problem: The color of printed dots is the color of the drum you should clean.
    • Dot location: The sheet has eight numbered columns. The number of the column with the printed dot in it is used to find the dot position on the drum.
  17. Use the numbered markers next to the drum roller to find the mark. For example, a cyan dot in column 2 on the check sheet would mean that there is a mark in the “2” region of the cyan drum.
    Marker
     
  18. Identify the drum indicated by the colored dot in step 17. Hold the drum unit frame with both hands, place your left thumb on the drum unit gear, and roll the drum toward you, as illustrated in the drawing below. Look in the numbered area identified in step 17 for any marks or scratches..
    Drum_surface
  19. When you have found the mark on the drum that matches the drum dot check sheet, wipe the surface of the drum gently with a cotton swab until the mark on the surface comes off.
    Cotton_swab
  20. Turn the drum unit over by holding the blue handles.
  21. Hold the handle of the toner cartridge and slide the toner cartridge into the drum unit, then gently pull it toward you until you hear it locks into place. Make sure that you match the toner cartridge color to the same color label on the drum unit. Repeat this for all the toner cartridges.
    Slide_toner
  22. Make sure the blue lock lever (1) is in the release position as shown in the illustration.
    Lock_lever_release_position
  23. Gently slide the drum unit into the machine until it stops at the blue lock lever.
    Slide_drum
     
  24. Turn the blue lock lever (1) clockwise to the lock position.
    Lock_lever_clockwise
  25. Push the drum unit in until it stops.
    Push_drum
  26. Close the front cover of the machine.
     

If your question was not answered, have you checked other FAQs?

Have you checked the manuals?

If you need further assistance, please contact Brother customer service:

Related Models

MFC-L8850CDW, MFC-L9550CDW

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