Question about Brother MFC 7840W Printer
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
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
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
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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