How to fix Error Code 7D Dirt on the Drum Unit in Brother Printer?

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 Manual Advice and Drum Reset Procedure by experts.

1. First clean Corona Wire in the Drum Unit, Clean electrodes of main body and drum unit.
2. Now Replace Drum Unit with a new one and Reset Counter.
3. Charge HVPS PCB failure, replace if required.
4. Main PB Failure, replace if required.


On machines you have two options of how to reset the Drum Life.


1. Open front door like you are going to change the drum or toner.
2. Press Clear/Back Button
3. Display will read Replace Drum?

  • Yes
  • No

4. Select 1.Yes and click the OK button

Second Option

1. Press the 3 and 9 button simultaneously.
2. Display read Reset Menu Select Drum and press OK
3. Display read Reset Menu Drum

  • Reset
  • Exit Select

4.Reset and press OK

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