Error Code 7D – Drum Error on the Brother 8480, 8890, 8080, 8085

 

Diagnostic Aids for the Error Code 7D Drum Error on the Brother 8000 Series Machines

The Drum Error  on Brother machines is typically a result of dirt on the corona wire. I usually find this error on machines that are used in dirty environments, use third-party  or compatible toners, and on machines where the customer didn’t replace the drum when the machine called for it. In this article I’d like to talk about a few of the things I noticed to hopefully resolve your issues on your machine.

Brother 8480, 8890 Error code 7D - Drum Error

First, thing to try is to clean the corona wire and charge grid area. Whenever you replace a toner cartridge you are supposed to  take the blue tab on top of the drum unit and run it back and forth across the corona wire 5 to 10 times. When I clean a customers machine I use a damp Q-tip and gentle swipe it across the corona wire a few times, this seems to work better than the blue tab. Also, I blow out the charge grid if I find it really dirty. Some times this will fix your drum error problems. I’d say about 50% of the time it fixes it, the other times you have to replace the drum or reset the counter. A lot of times when I get called out to work on a machine that has a drum error I arrive on site and ask the customer what they have done. Majority of the time they say they cleaned the corona wire and some times have changed the drum unit. However, most forget to do the most important step and that is resetting the drum counter. I’ve found on a lot of these drum errors the only way to clear the message is to reset the counter so make sure before you give up all hope you have completed the last and most important step and fixing this problem.

Service Manual Advice and Drum Reset Procedure
1. Clean the Corona Wire in the Drum Unit, Clean the electrodes of the main body and the drum unit. See picture below.
2. Replace the Drum Unit with a new one and Reset the Counter.
3. Charge HVPS PCB failure, replace if needed.
4. Main PB Failure, replace if needed.

Brother 8480, 8890 Electrode Cleaning Drum Error photo

Drum Reset Procedure for the 8480, 8890, 8080, and 8085 Series machines
On these machines you have two options of how to reset the Drum Life.
Option One
1. Open the front door like you are going to change the drum or toner.
2. Press the Clear/Back Button
3. Display will read Replace Drum? 1.Yes 2.No
4. Select 1.Yes and press the OK button
Option Two
1. Press the 3 and 9 button at the same time
2. Display will read Reset Menu Select Drum and press OK
3. Display will read Reset Menu Drum 1.Reset 2.Exit Select 1.Reset and press OK




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