This is a very simple problem, but require much skill.
You must disassembly the scanner unit, remove any screw you see (you need an no. 2 phillips screwdriver) and very gently remove the upper side (with glass) from the rest of scanner unit. Please note that is several plastic fasteners to be disposed.
after you remove the glass (with a plastic frame) you get a small tissue of cotton and soaking with an windows cleaner solutions. Gently clean the BOTH surfaces of scanner glass.
For assembly follow the reverse procedure.
Beware to the glass, it has only 3 mm thickness. Don't broke!
Like I sad: simple problem, but require much skill. If you think is to difficult for you, please go to the service.
a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Technician (only for users in the US for now) and get all the help you need. Goodluck!
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I recommend you do not take off the glass. I have done it and was never able to get rid of the dust, which really shows up on every scan. The fogging has something to do with an optical coating on the underside of the glass. If I knew then what I know now, I would let it be. If the fogging doesn't show up in scans, leave it. If it really does show up, the glass itself is often held down by simple double stick tape. You try to keep the tape intact so you can put it back down. It may be strong enough that the plastic frame on top of it could snap. Do it in as clean (not dusty) environment as possible so dust does not drift down inside the scanner. Never touch the lamp or move the scan mechanism. Again, don't do it unless it's showing up on scan results. Sadly, nobody "fixes" scanners, they are disposable, like coffee pots, even if they cost 300.00.
Lines on scanned and copied documents is usually caused by something on the scanner glass such as ink, correction fluid or trash. Open the top of the printer and clean the scanner glass surfaces with windex and paper towels. See this article for more details:
Open the scanner cover and you will see two glasses. One long and thin and the other larger than an A4 sheet of paper. The long thin glass is used to scan thru the adf and the larger glass is for flatbed scanning. As your lines are from the adf scanning, you will see tippex on the long thin glass. just clean it off and all will be well. Clean the flatbed glass as well while you are doing the job on the adf glass.
look at the scanner glass. It probably has some dust specs on it, clean it . Also clean the small glass toward the left of the scanner glass. If the dust specs are under the small glass, you can carefully remove the glass and clean it.
Simple, clean the ADF glass that the paper passes over during a scan (not the flatbed glass itself, just the thin strip of glass at the head of the flatbed glass). A speck of dirt on the glass will appear as a line down the length of the paper.
The scanner glass which reads your document has something on it (whiteout usually). Carefully lift up the top cover. There should be a thin piece of glass on the left hand side. Carefully clean it with rubbing alcohol. Shine a flashlight on this glass to really get a good look at the glass. You may have to scrape whatever is on the glass with your fingernail. DONT BREAK THIS GLASS.
The line doesn't show up when you print, right? If you are feeding your original from the document feeder when you get the line, there is most likely Wite-Out, dirt or other debris on the thin strip of glass to the left of the main scanner glass. You'll probably be able to see whatever is causing the line and clean it off, but if you can't see anything, try cleaning that glass strip with isopropyl alcohol and a lint-free rag.
If you get the line when copying off of the main scanner glass, there is dirt or dust on your scanner's mirrors, lamp, or lens. To get rid of the line, you'll have to take the glass and surrounding covers off and blow compressed air onto the mirrors and other pieces of the optics assembly. If that doesn't get rid of the line, wipe the mirrors down with a dry lint-free rag.
That means, your scanner lens are not reflecting images properly so you need to clean ADF kits and Glasses of Lens. i highly recommend not to mess up with your scanner if you are not aware of those all parts and if you are just open up scanner glass cover and clean those all ADF kits otherwise better getting help of a printer Tech. Good luck and rate all answers.
Does the line show up on PRINTS FROM YOUR COMPUTER also, or only when SCANNING A DOCUMENT? If the line is only from scanned documents, the SCAN GLASS has something stuck on it. The SCAN GLASS is a GLASS **** located under the ORIGINAL FEEDER. It is NOT the plate of glass you place the original on . Look UNDER the original feeder for a scrap of paper stuck in the optical path of the GLASS ****, and remove the scrap, or CLEAN THE SCAN GLASS IF CORRECTION FLUID, INK, ETC ARE STUCK ON IT. If the line shows up on ALL prints, your CHARGE CLEANING SLIDER located in the IMAGING (DRUM) UNIT must be slid all the way to one end of the charger, OR IT WILL CAUSE A BLACK LINE ON ALL PRINTS. Otherwise, the IMAGING UNIT may need to be cleaned or replaced. Toner smudges on the drum would indicate need for cleaning or replacement.