Question about Brother HL-4040CN Laser Printer
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Posted on Jan 02, 2017
More than likely the grey streaks are from dirty fuser rollers open the fuser area and insect the fuser rollers i think they should be grey take silicone lubricant and wiat ntil rollers cool down and clean with a coton cloth do not scrape with anything sharp if this does not work then you ned to remove the glass platen and clean the optics( mirror and lens with tissue and glass cleaner wen machine is not hot also insect expsoure lamp( do not touh lamps because the oil from your hands will cause the lamp to get extremly hot and burn out good luck
One other thought is there could be marks from the stripper fingers at the fuser section look for build up of toner on them if so clean with q tip and alcohol
Posted on Dec 30, 2008
The operating principles behind laser printers are fairly simple. In fact, Brother machines more closely resemble large copiers than conventional laser printers, this is why they are so reliable.
There are a couple of things to look at:
On the drum unit: is the imaging drum worn or scratched? When did you last clean the corona wire?
If the drum is scratched or otherwise with defect it should be replaced. If the corona wire is dirty it can fail to properly charge the drum and lead to print defects.
On the toner cartridge: Does the toner roller have any noticeable lines or banding in the toner?
Behind the toner roller is a "Doctor Blade" that ensures an even and consistent coating of toner. If there are lines in it they can produce print defects as well. Lines would be likely caused by toner accumulation on that blade. If there are lines, are you are careful, you may be able to clean the blade by gently and slowly scrubbing the non adhesive end of a post-it note between the toner roller and the doctor blade where the lines are.
Posted on Jan 15, 2010
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