Replace drum message
The printer has reached its estimated drum-life limit or the drum counter was not reset after fitting a replacement.
Help with drum units, warnings and print defects
Learn the difference between toner and drum units, how to replace a drum correctly, when a drum counter needs resetting and what to check if marks, lines or shading continue to appear.
Many laser printers use a toner cartridge and a separate imaging drum. Replacing the toner will not clear a genuine drum warning, and replacing a drum may require a separate counter-reset procedure.
Choose the issue that matches your printer
Start with the message or print symptom that most closely matches your problem.
Drum warning remains
A new drum may need a model-specific reset before the warning clears from the printer display.
Repeating marks
Spots or marks appearing at regular intervals may indicate contamination or damage on a rotating drum or roller.
Lines down the page
Vertical lines may relate to the drum surface, corona wire, toner cartridge or internal printer components.
Grey background or shading
Background toner can be caused by drum wear, contamination, density settings or loose toner elsewhere in the printer.
Unsure which part to replace
Check whether your printer uses a separate toner and drum before ordering or resetting any supply counter.
What is the difference between toner and a drum unit?
The toner cartridge contains the powder used to create the printed image. The drum is a light-sensitive imaging component that transfers that image through the printing process.
Some laser cartridges contain toner and a drum in one combined unit. Other printers, particularly many Brother models, use separate toner cartridges and drums that are replaced at different intervals.
Toner cartridge
Holds the toner powder. It is normally replaced when printing becomes faint, a colour runs out or the printer displays a low or replace-toner message.
Drum unit
Forms and transfers the image during printing. It normally lasts through several toner cartridges and is replaced when its life expires or print defects indicate wear or damage.
Replacing toner does not reset the drum
Toner and drum life are normally tracked separately. Do not reset the drum counter simply because a toner cartridge has been replaced.
Replacing a separate drum unit
The precise method varies by printer, but many separate-drum systems require the toner cartridge to be removed from the old drum and fitted into the new one.
- Switch off the printer and allow it to cool where recommended by the manufacturer.
- Open the printer and remove the complete toner-and-drum assembly while keeping it level.
- Place the assembly on clean paper or a disposable protective surface.
- Release the locking lever and carefully remove the toner cartridge from the old drum unit.
- Unpack the new drum without touching its photosensitive surface.
- Install the toner cartridge into the new drum until it locks securely into place.
- Clean the corona wire where the drum includes a cleaning slider, then return the slider to its marked home position.
- Reinstall the complete assembly and follow the correct drum-reset procedure for your printer model.
Do not touch the drum surface
Fingerprints, scratches and exposure to strong light can affect the photosensitive coating and cause permanent marks on printed pages.
Drum counter resets
Installing a new drum and resetting the drum counter are often two separate actions. The printer may continue to display “Replace Drum”, “Drum End Soon” or a similar message until the correct reset is completed.
- Use the reset procedure for your exact printer model.
- Confirm whether the printer has one drum or separate drums for each colour.
- Select the correct colour if the printer asks which drum was replaced.
- Complete the reset only after installing a new drum.
- Print a supplies-status page to confirm that the drum life has updated.
- Do not use a toner reset when the printer is asking for a drum reset.
Do not reset an old drum to hide a genuine warning
Brother drum replacement and reset guides
View model-specific instructions for popular Brother drum units and
printer families.
A reset does not repair a worn or damaged drum. Continuing to use a drum beyond its service life may result in worsening print quality or repeated maintenance messages.
Cleaning the corona wire
Some drum units include a small coloured slider used to clean the corona wire. A dirty corona wire can cause vertical lines, uneven output or print-quality warnings.
- Remove the toner-and-drum assembly according to the printer instructions.
- Locate the small coloured cleaning tab or slider on the drum unit.
- Move the slider slowly from one side to the other several times.
- Return the slider precisely to its marked home position.
- Reinstall the assembly and print a test page.
Return the slider to its home position
Leaving the corona-wire tab away from its marked starting position can itself produce a vertical line on printed pages.
Repeating marks and drum-related print defects
A defect that repeats at equal intervals often points to a rotating component. The spacing between marks can help identify whether the cause is a drum, roller, transfer component or fuser.
| Print problem | Possible cause | Suggested first check |
|---|---|---|
| Marks repeat at regular intervals | Drum, roller or fuser component | Print several pages and measure the distance between matching marks. |
| Single vertical line | Corona wire, drum surface or toner contamination | Clean the corona wire and return its slider to the home position. |
| Grey or coloured background | Drum wear, toner leakage or density setting | Inspect the cartridge area for loose toner and print a test page. |
| Random spots or dots | Drum contamination, paper dust or loose toner | Print several blank pages and compare whether the spots repeat. |
| Ghost image repeated further down | Drum, fuser or transfer issue | Check whether the repeated image appears at a consistent interval. |
| One colour has repeated defects | Colour-specific drum or toner cartridge | Print a colour test page to identify the affected supply. |
| Defect affects every colour | Shared transfer, fuser or paper-path component | Contact support, as the fault may not be one individual drum. |
Handling and storing drum units
Drum units are more sensitive than ordinary toner cartridges. Careful handling helps prevent scratches, contamination and light damage.
- Keep the drum in its protective packaging until it is required.
- Store it in a cool, dry place away from direct sunlight.
- Do not touch the green, blue or glossy photosensitive surface.
- Do not clean the drum with household sprays, solvents or abrasive cloths.
- Place removed assemblies on clean paper to protect furniture from toner.
- Keep the drum level and avoid exposing it to strong light unnecessarily.
Avoid direct sunlight and bright light
Leave the drum covered if it must remain outside the printer for more than a short period. Prolonged light exposure may damage the photosensitive surface.
When the fault may not be the drum
Drum units are commonly blamed for laser print defects, but similar symptoms can be caused by the toner cartridge, transfer belt, fuser, paper type or internal printer contamination.
- Toner that rubs off the page may indicate a fuser or paper-setting problem.
- A completely blank page may involve toner transfer or another printer fault.
- A defect affecting all colours may originate in a shared printer component.
- Faint printing may relate to toner distribution or an enabled economy mode.
- Grinding, clicking or scraping noises should be investigated before further printing.
- Replacing a drum may not resolve a fault that remains identical with several different supplies.
When to contact our support team
Contact us if the drum warning remains after installing and resetting a new drum, or if marks, lines or shading continue after the basic checks.
Please provide:
- Your order number.
- The full printer make and model.
- The drum-unit and toner-cartridge codes.
- The exact printer message.
- A photograph of the printer display.
- A clear scan or photograph of the affected test page.
- The measured distance between repeating marks, where applicable.
- Confirmation of whether the drum counter was reset.
Drum unit questions
Do I need to replace the drum every time I replace toner?
No. On printers with separate toner and drum units, a drum normally lasts through several toner cartridges. Replace it when its service life expires or when its condition causes print-quality problems.
Why does the printer still say replace drum?
The new drum may not have been installed correctly or its counter may still need to be reset. Follow the model-specific replacement and reset instructions for your printer.
Can I reset the drum without replacing it?
A reset should normally be completed only after installing a new drum. Resetting a worn drum does not repair it and may allow print quality to deteriorate without an accurate life warning.
Can I clean the drum surface?
Avoid touching or wiping the photosensitive surface unless the printer manufacturer provides a specific cleaning procedure. Incorrect cleaning can scratch or permanently damage the drum.
Why are marks repeating down the page?
Repeating marks often indicate contamination or damage on a rotating component. Send us a sample page and measure the distance between matching marks so we can help identify the likely source.
Does a drum warning mean the printer will stop immediately?
This varies by printer. Some printers continue printing during an early drum-life warning, while others eventually stop and request a replacement. Monitor print quality and arrange the correct drum before the current unit reaches the end of its useful life.
Should I return the drum unit immediately?
No. Contact us first. We may need to confirm the installation, reset procedure and print defect before arranging a return, replacement or further printer checks.
Still having trouble with a drum unit?
Contact our UK-based support team with your order number, printer model, drum code, exact warning and a clear sample of the print problem.