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Drum Unit, Make sure the scan glass and platen glass is clean. Run copies from glass and document feeder to see if line appears on one or both. Both Drum unit or fusing Film. Will need a copier tech to remove parts for inspection.
3 things it could be. Easy 1st! run a copy using auto doc feeder and then run off the glass. If you only have a line after document feeer then it is somting on the small scan glass. If it is on both most likly you need a new drum. Or your fixing film in your fusing unit is bad. Pulling the drum unit is not to bad but a tech might be needed.
Do the black lines show up when you use the adf or if you make a copy from the copyboard glass. If the lines only show with the adf > there is a small **** of glass on the left side of the copy board glass > I would clean the slip glass with windex or a damp cloth..... Good Luck
Do you have dadf installed? If Yes run a copie from it and second from platen glass.If you have lines on dadf copy but not on copie from glass, you should very good clean the left narrow glass (dadf glass). But if you have lines on both copies you should check/ replace drum unit, but be sure thath fixing film unit is ok.
Do the lines appear when you place a blank piece of paper on the glass and make a copy??If not then you need to thoroughly clean the **** glass, that is the separate narrow glass to the left of the machine when the top is up.Even a tiny dot of dust will appear as a vertival line on the copy.
Dear sir; Streak line, I have two things come out from my mind I need to clear; no. 1 do you make copy through ADF and got streaking line? if your answer is "yes" would you to make another copy direct from glass plateform, if copy coming out same problem that's means you need to replace drum cleaning blade, if copy coming out perfect then you need to clean the glass especial the narrow piece if they have, try it out and let me know, good luck!
HAVE A HAPPY HOLIDAY!!!
if the lines on the copies happen only when you use the doc feeder then you have something on the small slot glass if you put the document on the glass and make a copy if there is still a line it is probably the drum
Try dusting the feeder out with compressed air. Then clean the glass with a flat razor blade to get any stubborn gunk that glass cleaner won't get. then spray a rag with streak free glass cleaner and rub the glass strip several times. good luck.
Lift the lid to expose the top glass. To the left of the main glass panel, you will see a narrow glass strip.
Clean this strip using a soft cloth or sponge moistened with a nonabrasive glass cleaner, then dry it off with a dry chaois cloth or cellulose sponge.