Question about Brother MFC 7420 All-In-One Laser Printer

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Old canon copier prints thick balck line down right side of paper

Very old canon PC 6RE is printing half inch black line down right side of page

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  • Anonymous Mar 13, 2014

    black line down the side of the page

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Tthis is really old 25 years plus. replaced the drun cartridge which also contains the toner good luck canon sr tech

Posted on Jan 24, 2009

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Posted on Jan 02, 2017

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My HL2040 printer is printing black vertical lines along the right-hand side of the page, about 3" or so. A month ago I took it apart and cleaned the roller. Still doing it.


If the lines go all the way down the page, check the position of the corona wire cleaner tab (blue or green) at the top front of the drum unit. if not parked fully to one side it will create a solid black lines where it blocks the laser. Otherwise look for some other foreign object (or torn paper piece) that may be blocking the laser from the drum. If the lines are thin and shark, check for scratches on the drum (not repairable without replacing drum). If the lines are uneven thickness but in a pattern that repeats down the page every few inches, then the film on the drum is probably worn or wearing away and the drum needs to be replaced.

Mar 04, 2015 | Brother HL-2040 Laser Printer

1 Answer

Savin 9935DPE is printing one thick vertical balck line down the copy or print pages. About 2 of every 3 pages printed. What's wrong?


are you printing from Doc feeder or glas?? if from feeder then try to make a copy from the glass, does it still do it? yes problem is with drum.
No? problem is with the small scanning glass to the left, look carefully see if any spots or lines on the 1inch glas --- clean it

Sep 05, 2012 | Savin 9945dpe 9935dpe 2035dpe 2045dpe...

2 Answers

E 210


there is an lance home position sensor problem... open the platen glass, then open the lance cover (black Metal).. then turn on the machine and check the lance is moving forward and back to center.... if not clean the lance home position sensor or replace that.....

Nov 28, 2011 | Canon NP 6050 Copier

2 Answers

I have a grey/black line all the way down the right hand side of the page


Run a half test.
Put paper in the manual feed tray.
Print something, anything
When the paper is 1/2 way into the printer, open the cover.
Pull out the toner cartridge. Look down at the paper.
Does it have a black line on the right side?
If yes, replace the cartridge. If no, replace the fuser.

May 11, 2011 | HP LaserJet 1010 Printer

1 Answer

Thick black line on printed page


If the line runs the way that the paper does I.E. vertical on a portrait then it is dirty rollers normally.
If you open the lid and wipe the rollers this shoukd reduce or eliminate the black lines.

May 03, 2009 | Canon PIXMA® MP530 All-In-One Printer

1 Answer

Printer prints a black streak down the reverse side


You have a build up of ink inside the printer. I had a Canon that did this. I had to take the ink & print head out, and tear a paper towel strip 1 " wide and 13" long or however long the paper towel is. I folded it in half down the length so it was 1/2x13. Then used a plastic strip to shove it under the part the print head sits in. Once I got the towel to the other side, I grabbed it with my hand. I removed the plastic strip used to shove the paper towel under. So now the paper towel sticks out both sides underneath the print head cradle. I gently pull the paper towel back and forth so the paper towel can clean off the ink build up. Hope this helps.

Mar 29, 2009 | Office Equipment & Supplies

2 Answers

Thin black lines (mp 530)


Here's the link for how to clean the unit... I was going to post the instructions here, but there are pictures that might be helpful to you.

http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=SupportDetailTabAct&fcategoryid=238&modelid=13371

Before doing anything more drastic, I would try this.. let us know how it turns out.. if it doesn't work, we'll go from there.

Maggie B

Feb 23, 2008 | Canon PIXMA MP530 All-In-One InkJet...

1 Answer

Black line prints on back of paper


I have the same problem and I have not found any fix yet.

Oct 03, 2007 | Canon Pixma MP500 All-In-One InkJet...

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