I we use the feeder to scan multiple sheets of paper, a yellow line shows up in the middle of the scans.
If we just use the flat bed scanner, it doesn show up, cleaned all the rollers and the scanner glass, still has the problem.
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When you use the flatbed the copy is perfect because the ccd sensor is under the glass cover and obviously is free form dust/ dirt.
On the other hand if you use the feeder the ccd sensor is located in between the roller assembly (not sure exactly for this model).
This means that the page is scanned by the ccd in the feeder, any dirt on the ccd will appear as a black line. I assume that you are feeding papers from the side and not from the top that is why you get a horizontal line.
A quick test to see if the ccd sensor is dirty is to feed the paper from the top side to the feeder. If you get a vertical line it is a proof that your ccd sensor needs to be cleaned.
The worst case is that the sensor in the feeder assembly has a tiny spot that is damaged and it is causing the black line.
So , first try the test, then open the feeder assembly, locate the ccd and clean it. Hope that this helps.
You need a document feeder. The printer has on or it doesn't. If it does you usually place the documents face up in the overhead feeder and the scan sensor in the printer will detect a load of paper in the feeder and choose to there instead of a single sheet under the glass.
Check your flat bed and Document feeder scanning glass need to be clean, if any dot or dust in scanning glass of document feeder it will appear a line, check this points first 1- Check printouts from computer or FAX if it is clean problem in scanning section 2- Check using Copying a blank paper using only Flatbed if it prints without any line its problem from document feeder Scanning glass So solution is clean the Document feeder scanning glass using wet cloth, note careful about wet cloth switch off the machine and clean it
Sometimes using technical jargon makes it harder for people to understand each other (this applies to both askers and answerers).
I always advise askers to use normal language as much as possible and answerers to do the same and where jargon is unavoidable, to explain as they go along.
Please post again to clarify what you mean by "..a duplex to pdf..", in normal language not in technical jargon.
A PDF is not a real, physical document. It is a digital document on a computer or a webpage created in PDF format.
A Duplex document is a real document, printed on both sides of each sheet of paper.
If you are trying to scan a multiple page Duplex Document using the Sheet Feeder of your scanner, the ink on the reverse side may be getting caught up in, affecting and/or staining one of the rollers in the Sheet Feeder.
The bottom roller in most non-industrial Scanner Sheet Feeders expects to touch only the plain reverse side of a sheet of paper as it is passed through and turned over to rest on the Platten (scanning surface) of the scanner ready to be scanned.
Multifunction printers with built in scanners and sheet feeders and duplex printing capability are designed in a way that makes them more forgiving of dealing with duplex printed paper.
Duplex printing printed in a laser printer is less likely to cause a problem as long as it is allowed to dry thoroughly. Inkjet printing that is allowed to drry thoroughly should also be okay.
If the scanning is being attempted very soon after printing, then the wetness of the printing may be the problem.
Sheet Feeders that handle duplex printed sheets invariably become stained and need periodic cleaning.
If the document is not too long, you may have to scan it manually, page-by-page.
If the document exists as a PDF somewhere on your computer or on the internet, then it is unclear why you would need to scan it. This is why your question is puzzling.
Post a further comment, if this answer does not help you solve the problem.
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.
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.
This could be one of many problems, i will tell you a few solutions that i know of, check the lid and see if there is a bulge in the middle of the lid (is the lid uneven in anyway?), if it is, i would suggest that you return your printer to the place where you bought it. This could also be a setting on your printer, the setting could be to scan a book or to scan two smaller pages.
If you would like a manual on how to sort this out (if the problem persists), please e-mail me at email@example.com
Believe it or not, there probably is something in your scanner. Often times it is a very small piece of dust/fiber. If you are using the document feeder, the check the small piece of glass as the scanner bulb remains stationary and the paper is fed by. If you are laying the paper on the glass and scanning, then you will need to look at the scanner bulb itself. Run a scan with no paper and see if you see anything. If not, you can try to take it apart and clean the bulb (but do not touch the bulb with your bare fingers), with a light wipe of a tissue. If after cleaning, it either moves or goes away, then it is dust related. If it remains in the same position on the page, then there is a scanner bulb problem.