Question about Canon PIXMA MP830 All-In-One InkJet Printer

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Scan Copy no good

When I scan I end up with coloured vertical lines on my scan copy

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  • 286 Answers

Most likely the document scanner has gone bad. I'm not sure, but I think you may have to replace the entire scanner assembly and not just the scanner itself.

Canon parts are not cheep. Call a Canon shop and get a price on a replacement scanner unit.

Posted on Nov 04, 2008

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Run the "clean inkjets" routine followed by test pages until printout appears correct. Maybe the print cartridges are defective.

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if you make a copy form the glass is there any lines. if not clean the small glass on you left.

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My officejet pro 8500A prints black vertical lines down the page when I make a copy. I have cleaned and aligned the printheads. What else can I do?


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.

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I have an HP Officejet 6500 wireless printer. If I scan or copy a document through the feeder the scanned or copied document has vertical lines from top to bottom. If I lay the document on the glass and...


Lift the scanner top, then look at the narrow pane of glass. There probably is a spek of dust or ink on it. Clean it with alcohol. I've had to remove the glass, due to the speck being on the undersaide of the glass.

Also, lift the ADF cover and clan the rollers with a damp cloth.

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1 Answer

Very crisp vertical grey line appears (glass clean)


I have the exact same problem. It was there since I first bought the MFC-7840W.
Vertical line appears in scans using the automatic document feeder (ADF).
Vertical line does not appear when scanning single page (placing it directly on the glass -- i.e. not using the ADF).

Cleaning the glass strip for the ADF (or the white pressure bar overhead) does not solve the problem.
The problem does not occur with copies using the ADF (using the COPY button which is basically a scan and print). This would suggest that dust and dirt is not to blame because that would also appear on the copies.
But since I believe a copy is basically a scan plus print, they should be using the same electronics -- a hardware problem on the scan would likely appear on a copy also -- there is some difference between how they accomplish this.
It's definitely not a software issue since it occurs on all versions of Windows and Mac OS X (and multiple computers). It also does not matter whether I "push" the scan to the computer by using the scan button on the MFC... or "pull" the scan from the MFC using the Brother Control Center software.

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Vertical black line in scan document not in copies through document feeder


Lift the lid and to the left of the main glass is a smaller glass; that is what scans during the feeding process. Make sure that it is completely clean; even a speck of dust can cause a line to appear. I took a lens wipe and cleaned mine and my line was gone.

Jun 01, 2009 | Brother MFC-7820N All-In-One Laser Printer

1 Answer

Two black vertical lines appear on copy, pdf, and scan results


  1. Unplug the power cord and the phone line from the wall.
  2. Open the control panel.
  3. Pull the roller lever forward, and then lift the white roller out of the All-In-One.
  4. Note: The scan lens is located under the white roller.
  5. Use a clean, lint-free cloth dampened with water to wipe the white roller and the scan lens.
  6. Reinstall the white roller.
  7. Reconnect the power cord and the phone line.
  8. And then try to copy if get the dame line then its the hardware problem in the printer you must need to replace the scanner unit in the printer ..
Good luck..


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4 Answers

Print Problem - vertical lines


If the problem only occurs when using the document feeder, the problem is not usually caused by the drum. When using the document feeder, try to notice where the scanner (the light assembly under your scan glass)stops just before the paper is being fed. Some multifunction machines have a small piece of glass that is separate from the large scan glass and the scanner assembly stays parked underneith it as the original is being fed over it. Most likely there is something on the glass where the scanner parks as originals are being fed thru the feeder. When putting your original on the large scan glass to copy, the mark on the glass will only show as a spot, but will show as a vertical line thru the whole copy when using the feeder.

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