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Black line appears on scanned document - Brother MFC 7840W Printer

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Hi there! When does the black line appears?When you are using the ADF module or when you are using the normal copy glass under the top cover?If the lien is appearing when you are using the ADF open the top cover and clear the little glass from any dust.if the line appears when you are using the normal glass the your scanner unit need cleaning or replacing , for which you are going to need a service help! Please replay if you have any other questions!

Posted on Mar 15, 2011

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Posted on Jan 02, 2017

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EPIJAB
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SOURCE: black lines

Not sure what you have tried but if there are no lines when printing but there when scanning there is something on the scanner. Could be something as small a single dot of dirt and it will put a line down the whole page. Try cleaning the glass.

Posted on Dec 14, 2007

  • 9 Answers

SOURCE: Black lines when scan and copy documents

It is because coping is not the best way to get a perfect copy on the printer, Try scanning with computer using black and white photo it will come out much better if you are doing a pic. then use color picture.

Posted on Feb 17, 2008

antiochpc
  • 1314 Answers

SOURCE: 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.

Posted on Jun 01, 2009

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