Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I opened my printer to change the drum unit and I noticed a lot of black powder on top of the toner and the drum unit.

  • Is this normal?
  • Does this mean the drum unit/toner is bad?
  • Should I just change both of them or can I just change one?
  • If I change one, say just the toner, but the drum unit is bad - will it damage the new toner cartridge - and vice versa?

I cleaned the dust powder (which I guess is toner) off, but the printer still prints dirty.


Edit 1: All of this stems from this question - Can a generic drum unit cause a Brother HL-2170w Laser B&W printer print dirty?

share|improve this question
up vote 0 down vote accepted

Toner dust is gonna happen, so don't worry too much.

However, if you start getting unfused toner on your output paper, it could be a sign of a bad fuser roller and you may need to replace it.

share|improve this answer
I updated the question to include a link to another question I asked that has an image of an output from my printer. So, the bad fuser that in the drum unit? I have a new drum unit, I am wondering if I should use it with the existing toner or will that possibly damage it? Am I better off just changing both? – marcamillion Jul 15 '12 at 0:36
Here's a great site: Often, a bad fuser results in the print looking ok until you touch it and then it smears... Random toner on the page that doesn't rub off seems more like a toner cartridge. – BrianAdkins Jul 15 '12 at 0:56

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.