Pages were yellowish. Thought it was leaking yellow toner so changed yellow cartridge and fitted new waste container but pages are now reddish-yellow.
SOURCE: laser printer horizontal streaks go away after a few pages
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.
SOURCE: My Panasonic FP-7722 is printing
Hello. Use a wee bit of rubbing alcohol to clean the rollers. Let it dry and then clean them all again. Joe
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