Of course, dirty glass is easy to test simply by using the copy function too! I'm afraid that it is the fuser, that realistically means replacement of the entire printer (or using it only to copy and print from from the computer)! Any help on the parallel magenta lines. I have replaced the toner cartridge (and obviously set the printer settings proper from Windows software)! DOES ANYONE KNOW HOW TO RESET THE FIRMWARE IN THE PRINTER!!!!
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With very limited information, I suspect if you observe closely on the side that has the line printing you will find a dark smudge on the glass. If this is found you should be able to use a little rubbing alcohol on a clean cloth an remove the smudge.
Happened with me too. Turned out to be a small sticky smudge on the ADF glass. That is the smaller glass scan area to the left of the large glass scanning area. When using the ADF to scan or copy, make sure the smaller glass area is clean along with the rollers.
lift the top as if I were going to scan or copy something. I checked
the glass. On the far left is a separate glass area. This is what the
feeder uses to actually copy or scan a document. This had a smudge on
it. I cleaned the glass and it was fixed.
The most common cause of blank (void) lines on a scanned document is from whiteout on the glass where the page is scanned when using the document feeder.
If there is a clear mylar sheet on the bottom of the document feeder, the whiteout may be there instead.
If there was dirt or a dark smudge on the glass (or mylar), it would show up as a black line, but whiteout is white, and shows up as a void (blank) line.
Do you see the same smudge mark if you lay the original on the platen rather than using the document feeder? If it only shows when using the document feeder, clean the scanning glass for the document feeder. It's the small glass to the left of the main glass with the cover open. Use a damp cloth and clean off any dirt or white-out.
Very nice trouble shooting. The image defect you describe point to the OPC or drum unit this is essentially the toner cart. In your case black. Measureing the distance between repetitive defects is a sure way of diagnosing problems such as yours. Again nice work.
Google repetitive defect ruler for your model to help in the future.
If you are running your copies through the document feeder then see if the line goes away if you make a copy directly from the glass. If the line goes away then open up the doc feeder assy. by hinging it to the left. Underneath you will find that there is a thin strip of glass that the document passes over when it is scanned. Clean this strip of glass and this should correct your problem. If there is a smudge of dirt or small line, it will come out as a solid verticle line when scanned.
Take a look and see if the drum near the door moves up vertically. It shouldn't move more than 3/16ths of an inch. If it does, replace the upper felt seal/plastic slide. The upper seal that supports the front of the drum on the front of the dryer is worn out to the point that clothes can get stuck in the gap between the drum and the front of the machine. This leaves brown wedge marks on clothes. While it's apart, replace the lower felt seal as well.