Hello, My acculaser cx11nf is prining four little colored dots representing each toner color in two spots on the right side of the printed page. If it is a black text page only, a single black dot appears in the same two spots. I have seen the solution to what appears to be a similar issue on this site, but my photoconductor is relatively new, as well as all toner cartidges. I have tried cleaning the print head and all other parts as described in my user manual. Any other suggestions? Thanks, Kevin McKee

Check your print driver settings. And if you are printing from any of the microsoft office applications look at the page setup to see if something was changed. Click file, then right near print is the page setup.

Could be toner build-up on the fuser sleeve. Pull out the fuser and check the rollers for spots.
Try running cleaning pages before replacing fuser.

I have a Brother HL 4040cn color laser printer and I had the same problem. On every page I printed there were these black dots that appeared down the right side of the page in regular intervals. I tried the automatic drum cleaner and that didn't work. I opened the printer from door, removed the black toner cartridge and looked at the drum. Sure enough there was a speck of black crusted toner stuck to the drum. I used a q-tip and lightly scrubbed at the spot to remove the toner then I used the gear on the left side of the drum to rotate it and check for any other smudges and there were none. Put the toner cartridge back in and it was good to go again...no black dots!!

Hope this helps someone because I couldn't find the solution myself when I searched.

The problem lies with the black toner cartridge. This is a common problem in these machines due to poor design by Brother. Best solution is to replace the offending color toner cartridge.

Rev. Gregory.
Its looks like you have a small pinhole, or divot, on a imaging conponent that is common to all four toner cartridges. Remove the drum unit from the prtr and keeping the green handle close to you pull back the shutter which covers the drum, and look for spots of toner at the either end. If you hold the page with the spots on it, with the leading edge centered and touching the drum, it will give you some idea where the edgeis relative to the end of the drum. If you can't see any corresponding spots on the drum surface.
Put the drum unit back into the prtr and allow the prtr to restart, then switch off and remove drum, this will have turned the drum to a new position, and should show any defects. Only expose the uncovered drum to light for a minute at a time, and avoid touching the surface.
Let me know what you find.
Cheers
DeJudge

Make sure the toner trap is cleared out, open the front panel (A) on your right hand side there will be a leaver to pull out, pull this and on the right side of the printer there is a little blue cap, take this off, pull out the trap and wipe it off with a cloth and puch it back. put the cap back and also the front leaver and close (A). Hopes this help

Oh-ho! The coloured spots are what is known as "traffic lights". To be sure these are the symptoms: You will have a black spot then a slightly larger gap then the three colours regularly spaced, the pattern will repeat every 150mm or so. If you print a black only page then only the black dot will appear, print with any colours and all four dots will be printed. It is caused by a tiny/slight scratch on the photoconductor (PCU) drum (usually caused by mishandling, a loose or foreign object inside the printer or even trying to print on stapled paper!). Polishing the drum using a very soft dry cloth can often help to get rid of the scratch, but remember to keep it away from any bright light as this will damage the sensitivity of the drum. The traffic lights will be in line with the scratch so concentrate your efforts in that area. Also, while the PCU is out, take a good look inside the printer for any loose or protruding objects, rotate the toner cartridges from above with the front cover closed (opening the front locks the cartridge carousel in position). I sincerely hope this helps as the only other remedy is to replace the PCU with a new one.

from what you are saying, if color is fine and black is not, its most likely the black drum that is the problem. the toner is part of it. try taking the black toner out and shaking it, and putting it back in, if it still does not help, most likely it is the toner/drum.

thanks adi

did you check the drum? drum might be bad

Hi.. To fix the E527 error, close the front panel (cover A) and open the top cover (cover B). With the photoconductor unit removed, the toner carousel will rotate. It only rotates if cover A is closed all the way. You can easily rotate the carousel to a position where you can remove/reinstall the toner cartridge if stuck.

Thanks
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