Question about Canon imageCLASS D780 All-In-One Laser Printer

1 Answer

Feeder issue When I use the document feeder, I get a black line down the center of the page. How do I fix this?

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 10 Answers


Posted on Nov 06, 2007


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a Epson cx11 and get a black vertical line down the middle of scans and copies

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

Feb 04, 2013 | Epson AcuLaser CX11NF Printer

1 Answer

We have a black line down the center of all copies...

If the problem only happens on copies or sent faxes then no it is not your drum. There is something on your scan glass. My guess is you are getting the line on your copies when you run the original through the document feeder. If you get lines through the document feeder but not on copies made off the glass then it is a dirty scan glass. There is a thin glass strip where the document feeder feeds the original. Usually something like white out that did not dry smears off an original and ends up on this thin strip of glass. Scratch it off with your finger nail and use some glass cleaner to resolve the problem. The scan glass is about 1/2 an inch to an inch wide and will be on the same side of the machine that the copier feeds the originals in on

May 20, 2010 | Office Equipment & Supplies

2 Answers

Black lines down on printed page

This is caused by dirt/debrise on the ADF (automatic document feeder) scanner glass. You need to open up the feeder where your originals are fed in and look for a strip of glass that runs from front to back. It is about an inch or so wide. You need to clean this glass to get rid of the lines. Some models have this glass just to the left of the large main glass, but in your case I beleive it is in the feeder itself.
Good Luck.

Apr 23, 2010 | Brother MFC-7820N Printer

1 Answer

Blank line down left side of outgoing fax or feeder copy

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.

Mar 11, 2010 | HP Officejet Pro L7680 All-In-One Printer

2 Answers

Brother Intellifax 1" black line on right in send & copy modes

lift up your document feeder and check for something on the **** glass

Nov 16, 2009 | Brother IntelliFAX 4100 Laser Fax

1 Answer

Black line when using feeder

Not familiar with this model in particular, but if you lift the document feeder, as if to place an original on the glass, there is either a narrow filter glass on the left of the main contact glass, or in many cases it is attached (clipped on) and lifts up with the document feeder cover. Clean this glass. If it is clipped on to the cover, remove it, and clean both sides. I hope this helps.

Please rate solution :)

Apr 24, 2009 | Office Equipment & Supplies

1 Answer

Black Line Down Center of Page

I had the same problem. I cleaned the strip above the glass and this fixed the problem. Hope it helps!

Feb 14, 2008 | Canon MultiPASS MP730 All-In-One InkJet...

Not finding what you are looking for?
Canon imageCLASS D780 All-In-One Laser Printer Logo

Related Topics:

79 people viewed this question

Ask a Question

Usually answered in minutes!

Top Canon Office Equipment & Supplies Experts


Level 3 Expert

102366 Answers

old marine
old marine

Level 3 Expert

2068 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a Canon Office Equipment and Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides