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I have a MFC-7820N printer. A solid black vertical line appears on scanned documents. I have cleaned the laser scanner window, and the corona wire, and returned the blue tab to the correct position. Please help. Thank you Philippa White

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Clean mirrows in the scanner unit with the special liquid or 99% pure isopropyl

Posted on Nov 19, 2008

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My Brother MFC-7420 Printer always prints black lines and splotches down the left side of my paper. This happens whether I'm scanning or printing from my PC. When I looked at my drum, it appears a


If you are seeing vertical streaks/black lines your primary corona wire is dirty and or the fax scanner may be dirty.
1)To clean the corona wire you take the drum unit and toner cartridge and place it on disposable paper to avoid spilling.
2) Clean the primary corona wire inside the drum unit by sliding the blue tab from right to left several times.
3) Return the blue tab and snap it into the home position.
4) Reinstall the drum unit and toner cartridge.
5) Close the front cover.
Caution: if you do not return the blue tab to the home position it may repeat the black lines.

Nov 29, 2012 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Copies are being printed with a line vertically down the side of the page. Only happens when copying using the hopper.


If it's a thin, sharp line, it's just a blob of ball-point pen ink on the scanner glass. Lift the lid, and you'll see the narrow strip of glass that the scanner uses when you feed a document through the feeder. Clean that with a rag dampened with window cleaner, or, better yet, alcohol. Even a dot of ink too small to see will show as a solid black line on anything you copy, scan, or fax via the doc. feeder.
Don't use so much cleaner that it runs under the glass.

Nov 10, 2010 | Brother MFC 7420 All-In-One Laser Printer

2 Answers

Brother MFC-7820N Printer--vertical lines


You need to clean the scanner glass. Also known as the strip glass. It is a 1 inch wide strip of glass that runs from the front to the back. Your documents pass over this glass when they are scanned. Some of the wax crayon probably smeared off onto the glass and now when you scan the scanner sees these marks as stationary and thus records them as solid lines. Just look into the scanner section where your documents are fed in or depending on model, some are just to the left of the large original glass.
Good Luck and thank you for using Fixya.

Feb 25, 2010 | Brother MFC-7820N Printer

1 Answer

Brother 7820N has black vertical line when using ADF


It's the same scanner ccd, after you make sure the narrow scanner window is clean, you need to power down the machine and power up again so it will calibrate to a clean window, if it has a scratch like from a staple, you will need a new glass.

Jan 18, 2010 | Brother MFC-7820N Printer

3 Answers

When using the ADF for scanning to pdf, it creates black lines vertically down the left side of the document. If I use the flatbed scanner, no lines.


Hi,
Your machine ADF is dirty or dust in adf glass please clean it by soft cloth and scane again its clear and sharp.
thanks.

Nov 24, 2009 | Brother MFC-7820N Printer

3 Answers

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

2 Answers

Scanner leaves three vertical lines on scanned page


Hello,

A dirty glass base can cause ‘spots’ or blemishes to appear on your final printout. Additionally, if you had some sort of opaque liquid that may have transferred on to the glass base from a previous operation. But the majority of the unwanted vertical lines are generally caused by either a dirty or damaged print roller or faulty LEDs in the Scanner Module.

To separate one from the other you have to check the following:

Do you only see the lines with a Scan operation?
Do your print jobs print fine without any unwanted lines?

If you only see the unwanted lines during a Scan operation, then most likely you have a fault/dirty/obstructed LED module.

If you see the unwanted lines with all print operations (Scan, Print and Copy), then you most likely have a worn out, damaged or dirty Print Roller.

Hope this helps…
RojoSho

Sep 29, 2008 | Brother MFC-7820N Laser Printer

5 Answers

Stripe on receiving fax Brother MFC 7820N


I had the same problem, and I just fixed it.  It was a tiny little black dot which was stuck to the glass where the document feeder passes the paper to.  First you need to figure out where the line is on paper with respect to the paper, and just carefully run your finger on the glass to see if there is something on the glass.  I removed it, cleaned the glass, and anything which I run through the document feeder is now fine.  Hope this helps.

Aug 15, 2008 | Brother MFC-7820N Printer

1 Answer

Line down page on copies


what kind of line. Is it solid and think with well defined edges or is it a small thin and dotted? If it is solid with strait crisp edges you will need a new scanner. If it is just a small somewhat dotted you might just have a little something on the scanner glass. Clean it with regular rubbing alcohol and a cotton cloth like an old t-shirt. Don't use swabs or tissue because they can leave lint behind and just give you more lines.

Feb 18, 2008 | Brother MFC 7420 All-In-One Laser Printer

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.

Feb 23, 2007 | Brother MFC-7820N Laser Printer

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