THERE IS A LINE ON THE RIGHT SIDE OF THE SCANNED COPIES, CANNOT SEE ANY OBVIOUS DIRT ON ROLLERS

Run the printers maintenance software and run the align print head option and the run the clean print head option and check again and see if the streaking is still occurring.

Probably is just a dirt in scanner glass, try to clean the glass with eyewear cleaning wipes.

Hi,
When the paper is fed through Automatic Document Feeder (ADF) is is scanned before copy or fax. The scanner is fixed type and is located just below the ADF.
The lines are due to dirty scanner mirror. The printer/ scanner design is based Sheet-Fed Scanner. Open/Lift the Control Panel (scanner top )(by pulling it up from front - the area from where the paper to scan comes out). Look out for the horizontal mirror and use a soft, damp, lint-free cloth to gently clean the scanner mirror, rollers etc. and enjoy clear scanning and copying!

Inspect for any tron pieces of paper dirt etc.DONT USE PAPER, CHEMICALS OR ANY ABRASIVE CLOTH as it may damage the parts.
Also note that your machine can scan an image only 8.15 inches wide, regardless of how wide the paper is.

Hope it helps! Good Luck! Thanks for using Fixya!
CreativeTECH

This is caused by dirt/debris stuck to your ADF scanner glass. When you use the feeder on these type of machines what happens is that your documents are fed over a strip of glass when they are scanned. So anything stuck to the glass is scanned as a solid "line". You just need to locate and clean the strip glass. It will be located 1 of 2 places on your machine. The first location would be just to the left of the larger main glass. Just look for a strip of glass about an inch wide running from the front towards the back. The other location is harder to find as it would be located inside of the feeder assembly. Sometimes you have to open the feeder unit and look for the glass strip inside. But most machines it is located just to the left or right of the large main glass. Since your copies are fine when you use the main glass then be assured that the strip glass is what is causing this problem.
Good Luck and Thank You for using Fixya.
WheatlandServices

Check the small **** glass in the left side of the printer under the top feed for dirt, ink, whatever. Clean it with windex. That should solve your problem. The "whatever" is right in the path of the scanner, and the scanner is seeing that as permanent spot, which ends up as a line on copies.

Is this an analog or digital copier?
Multiple things could cause what you describe.
To answer your question rubber rollers can be cleaned with soap and water and a damp cloth.
Hot rollers cannot be cleaned and should be replaced as the teflon coating has failed.
Organic drums should not be cleaned with a cleaner but just a clean dry cloth.

I would look at your mirrors(under the glass) if there is dust on them it will darken your copies and could cause lines.

If it is digital print out a counter if it is a good print the your problem is dirty mirrors and / glass

You have a piece of dirt or whiteout on the scanner glass. When the paper is moving by, it creates a "Line" if the paper is sitting still on the glass, it may be a dot or it may even use a different glass alltogether for ADF vs Paltten scanning.

Do copies come out the same? How about when you print? If you get the stripes whenever the printer prints from the computer or copies, then you probably have a bad ink cartridge. If you get it only when you make copies or scan, then check for dirt on the scan glass. Clean it anyway with some commercial glass cleaner. See if that works.

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.

Nisha... If you haven't done so already, you need to run a few copies off the glass as opposed to through the feeder to determine "where" your problem is. Do the copies of your originals placed on the glass have the same line/streak defects as the ones made run through the feeder? IF NOT, then you probably have some sort of dirt or contamination on the FAR RIGHT side of the glass (ink, white-out, dirt, etc), and the machine is reading that as part of the image and printing it as a line. When running copies through the feeder, the scanner moves to the far right and parks there. Then the feeder moves the original over the scanner on the right side of the glass (the scanner stays still). So if you find the lines evident when using the feeder, but not there when copying off the glass, you need to clean the glass on the far right. IF YES (lines/streaks through the feeder AND off the glass), then your problem is most likely internal of the machine (bad drum in the L50 cartridge, dirty optical scanner, worn fuser rollers, etc) and I hate to say it, but will probably require a service call to rectify it. Sometimes you can actually take the L50 cartridge out immediately after running a few copies, and while holding it up, manually open the spring-loaded drum shutter on the under-side of the cartridge to expose the drum and visually inspect it to see if the line defects on your copies are evident on the drum itself. If so, you will most likely need to simply replace your cartridge and hopefully save a service call. If you can't really tell if the streaks are on the drum itself, then you're back to probably needing a service call. NOTE: DO NOT TOUCH, WIPE, CLEAN, OR OTHERWISE CONTAMINATE THE DRUM WHILE YOU ARE DOING THIS, and do not leave the unit exposed to light for longer than a minute or so, because if the problem isn't evident/obvious with the drum cartridge, you don't want to risk damaging/contaminating it and thereby causing one. Please let me know if any of this was helpful. Thanks.