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Re: intermitantly streaking copies
Sounds like the wiper blade in one of your cartridges has failed. Try swapping cartridges and see if this helps. The problem could be with only one of the cartridges, so try changing one at a time to find which one is causing the problem
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A) Black Streaks, Shadows, And Ghosting Adjust the printer's lightness/darkness setting to 2-3 different variables and see if problem disappears.
Look at the fusing assembly - is the roller torn or does it have any black buildup? Use caution!!! It gets HOT!
This can be anything from something on the glass to charge corona dirty, laser dirty, drum or blade or fuser rollers need to be replaced. For the average person, the best you can do yourself is to make sure glass is clean. Question..... do you get this line if you're printing also? If yes then that would eliminate the glass and has to be something inside. If no, then look very carefully at the glass and long skinny glass on top, if it has that, for white out or something on the glass. Sometimes you won't even see spot unless you look at just the right angle. Good luck. Please rate this if it helps.
You probably have some build up on the glass, which happens if you use the auto feeder most often. Alcohol type cleaner will remove with a very softcloth. One small dot will look like a long streak on a feeder, much like a streaked fax. The other issue is the photoreceptor belt has nicks or is dirty eaither way it needs to be replaced. Try the cleaning first and you may have to look hard for the small dots built up on the glass.
Does this streaking problem occur when printing (not copying)? If it does then you are probably looking at a consumable issue. Alot of times black streaking is caused by a defective or spent drum. Is your drum new? There is also a blue piece on the drum unit used to clean the corona wire that cleans the drum. Have you tried moving it back and forth several times?
If the problem only happens when copying and the streaks are as bad as you make them out to be then you problem have a bad CIS unit (scans your originals for faxing or copying)
It is because coping is not the best way to get a perfect copy on the printer, Try scanning with computer using black and white photo it will come out much better if you are doing a pic. then use color picture.