What you just need is simply the knowledge on how to remove the unit’s consumable items inside particularly the drum and toner. So basically, it’s similar and very simple as if you are just about to replace an empty cartridge and drum with new ones. The process will only take about 10-15minutes depending on how fast you can execute the steps we provide below.
Note: This guide will also work with laser printer models inline with the MFC-8510 series and some MFC-series units.
Before you begin with the process, restart your unit first and see if the problem disappears. If it still appears then proceed on the instructions below.
While the unit is still ON, let it rest for like 10 minutes or so, letting it cool down a bit before you make any actions inside it. If you don’t want to get your hands dirty with toner particles you may wear protective gloves with antistatic or just a normal pair of gloves.
Open the front cover through pressing the release button found at the top-center of the printer. Pull it outward to access the Brother TN750 toner and drum.
With proper handling, take the whole part from which the cartridge and drum seat.
Cover a flat surface with newspaper sheets or anything that can work as a cover for the area where you will put the cartridge assembly down.
Separate the toner from the drum by unlocking the green lock tab at either side of the item. Simply push it down to release the cartridge so you can lift it up. Remember not to touch the shaded part (roller) to prevent any print problems.
Check if the cartridge has any defect or dent that might cause the error. If everything is fine, reseat it back into its drum slot by pushing it in place until the green lever lock makes a click sound.
Double-check the drum and toner by shaking gently to see if they’re properly and securely locked into place.
Install the cartridge assembly back inside the printer, close the front cover and restart your unit. With a bit of luck, it should work like good as new.