Drum Units: When to Replace Yours

Introduction

In a laser printer, the drum unit is the part that transfers toner onto the paper. It is not the toner cartridge. This guide explains the difference between a drum and a toner cartridge, and when to replace the drum.

1. Drum vs toner: what is the difference?

The toner cartridge holds the toner — the fine powder that acts as the ink. The drum unit is the roller that carries the toner onto the page. In many Brother printers, the toner and the drum are two separate parts: a TN toner cartridge and a DR drum unit. In some printers, they come together in one cartridge. If your printer has separate parts, you replace each one when it is finished — you do not need to replace both at the same time.

2. When to replace a drum

A drum usually lasts much longer than a toner cartridge — several times longer. Replace the drum when the print quality drops and a new toner cartridge does not fix it: lines, spots, streaks or faded areas on the page. Many printers also keep count of the drum's pages and show a message when the drum is at the end of its life. If your printer says the drum needs replacing, it is time.

Examples sold on Accuprint Québec:

3. How to find the right drum

Drums are made for specific printer models, so the first step is to find your printer model number — it is printed on the front or on a label on the machine. Then check the "compatible with" section on the product page. A drum for one model usually does not fit another model.

4. What happens if you do not replace it?

The print quality keeps getting worse: more lines, more spots, more faded areas. Replacing the toner alone will not fix it, because the problem is the drum, not the toner. A new drum restores clean, sharp printing.

So the rule is simple: if a new toner did not fix the print quality, check the drum next.

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