Brother MFC-7860DW Drum Error Replacing drum unit DR-420

Brother MFC-7860DW Drum Unit DR-420. A new drum unit can print approximately 12,000 Letter or A4 size single-sided pages.

Note

•  There are many factors that determine the actual drum life, such as the temperature, humidity, type of paper, type of toner used and so on. Under ideal conditions, the average drum life is estimated at approximately 12,000 pages. The actual number of pages that your drum will print may be significantly less than this estimate. Because we have no control over the many factors that determine the actual drum life, we cannot guarantee a minimum number of pages that will be printed by your drum.
• For best performance, use only genuine Brother toner. The machine should be used only in a clean, dust-free environment with adequate ventilation.
• Printing with a non Brother drum unit may reduce not only the print quality but also the quality and life of the machine itself.
  Warranty coverage does not apply to problems caused by the use of a non Brother drum unit.

Brother MFC-7860DW Drum Error

The corona wire has become dirty. Clean the corona wire in the drum unit.
If you cleaned the corona wire and Drum Error was not cleared, replace the drum unit with a new one.

Brother MFC-7860DW Appear Error Message Replace Drum
Please replace the drum unit with a new one. We recommend a genuine Brother drum unit be installed at this time.
After replacement, reset the drum counter by following the instructions included with the new drum unit.

Brother MFC-7860DW Show Drum Stop
We cannot guarantee the print quality. Please replace the drum unit with a new one. We recommend a genuine Brother drum unit be
installed at this time.
After replacement, reset the drum counter by following the instructions included with the new drum unit.

Replacing the drum unit for Brother MFC-7860DW printer

1. Make sure that the machine is turned on.
2. Open the front cover and leave the machine turned on for 10 minutes to cool down.
   
3. Take out the drum unit and toner cartridge assembly.
   
4. Push down the green lock lever and take the toner cartridge out of the drum unit.
   

Resetting the Brother MFC-7860DW drum counter

When you replace the drum unit with a new one, you need to reset the drum counter by completing the following steps:

• Press Clear.
  To confirm you are installing a new drum unit, press 1.
• When the LCD shows Accepted, close the front cover.