Make a copy when you here the paper getting picked up count 2 seconds and open front cover or side stopping the process open the copier and see if the dark line is on your drum or transfer is the problem
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fuser drum is bad. photocopier use electricity to transfer the toner to the paper, then it is heat fused to paper. it appears that the problem is occurring around the time that the toner is attracted to the paper.
Put paper in the manual feed tray(tray 1).
When the paper gets about 1/2 way into the printer, open the top cover.
Pull out the toner. Look down at the paper in the printer.
Do you see a thick dark line? Replace the toner.
No thick dark line, check the fuser for damage.
Did you clean the lens and the mirror under the lens cover? If so, There is a VR behind the front cover of most small Xerox machines. One VR makes the image darker/lighter and one VR changes the lead edge registration.
Whats the make and model of the copier?
One culprit might be the drum. If you can take a look at the drum from your copier and you see black lines on it. It could be scratches on the drum or it may need a new cleaning blade to clean the toner off the drum.
It depends... never use a Reman cart in these machines... only use sharp...especially if the machine is under warranty. Does this happen when, Using the Doc Feeder When making copies from the Glass Or when you print from a computer (assuming you print from a PC) If you print something and this happens then it is inside the machine Probably toner or developer dumping... Take a few pieces of large white paper and cover the entire glass surface... make a copy is the line there? If so see the answer above... if not then close the top and make a copy with no paper on the glass... is that black line there.. If so then your top needs adjustment... One more test If you make a copy using the doc feeder, this black line only occurs when making copies with the doc feed, clean the **** glass, and try again...
bit vague...Cq not good? What does that mean? Light copies> could be related to toner or ROS unit (laser unit) if prints OK but copies U/S clean mirrors and ccd lens Dark copies , streaking? Cleaning blade /drum unit U/S or could be streaking from fuser roll Patchy copies , dark edges, light edges ??????? more detail please
dark lines is probably caused by the thin glass of the copier. test by making copy on glass, does it have lines? if no look carefully at the small 1" glass there is probably some ink dots or white out or something on it, clean with alcohol and try.
fish scales uniformly are coming from the fuser, ( where it gets hot as its coming out) check.You already changed drum which was a posssibility.
Also check the toner and see if it is solid black.