Question about Canon NP 6551 Black and White Copier

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Copies come out perfect on the top of the page but the image is fades to almost nothing at the bottom of the page. Adjusting light/dark settings either bleeds out the whole image or causes Shading. What may Cause this? What can I do to fix the problem?

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Have you changed the paper or flipped the paper over yet? Have you gone to add. funcations and go to cleaning and run the wire cleaning. Also, I would clean and replace all of the corona wires.

Posted on Aug 31, 2010

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1 Answer

Why is my printer printing faded colours


Hi Kath,
I expect you have it sorted by now.
I think you might have had one off the developer tanks stuck or broken. If the developer roller does not turn then the colour quickly fades along the page. If you tried to do a test page and that was good then there was nothing wrong with that side of things.
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Our copier is copying in light shade. how to make it darker


To adjust the default lighter/darker setting

1. On the LaserJet 3015, press MENU/ENTER.

2. Use the < or the > button to select Copy setup, and then press MENU/ENTER.

3. Use the < or the > button to select Def. Light/Dark, and then press MENU/ENTER.

4. Use the < or the > button to adjust the setting. Move the slider to the left to make all of the

copies lighter than the original, or move the slider to the right to make all of the copies

darker than the original.
5. Press MENU/ENTER to save the selection.

Page 48 of the User Guide has instructions for adjusting the light/dark setting during a copy job.

Also see the Troubleshooting section of the User Guide for other possible reasons for light/faded copies.

If your copies continue to come out too light, you may need to clean the insert a new toner cartridge or change brands of toner. I tried several "generic" toner cartridges and refills, but my prints and copies were always faded or streaky. After going back to genuine HP cartridges, I haven't had any print quality problems.

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Konika Minolta Copier prints half dark pages


If it is only causing an image problem when you copy and not when you print, then there is something wrong with the optics under the glass. Check and see if you have any mirrors out of place or if the scanner looks crooked. If you have the machine set up to scan try and scan to SMB or email to see if it still has the problem. If everything looks correct under the glass and scans to SMB and email look bad like the copies, you may have a bad CCD assembly, or a bad board.

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Adjust the printer's lightness/darkness setting to 2-3 different variables and see if problem disappears. Look at the fusing assembly - is the roller torn or does it have any black buildup? Use caution!!! It gets HOT!

Try another toner also.

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Some of the text on the copies faded out


Hello am called Martin you have to replace the drum of the printer if the machine does that again that's what i can tell you and you have to check on the type of the toner in the cartridge thx success

Jan 29, 2010 | Toshiba e-STUDIO 352 Black and White...

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Phaser 7300 - one color fading on diagnostics page


Are you using third party toner? That is one thing that causes that problem. Use only xerox toner.
The other thing is that your image unit could have come defected, if it was brand new. Try changing the image unit and that should fix that problem. Good luck. 016-1993-00 image unit & toner 016-1977-00

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Dark copies in normal mode.


Cleaning the optics and corona wires will clean up your image quality. It's just dust build up on the mirrors and lens.

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Copies fine on bottom, but fade to nothing at top


Could be one of many things. Possible new transfer roller - make sure the transfer roller is not jammed.

Check the developer roller (at exit from toner hopper), to see if it is rotating properly. Check all connections to/from drum and transfer rollers.

This is most likely a dev unit problem. Not sure if dev/hopper and transfer are all in one unit - if so, replace the lot, or you'll be chasing one problem after the other.

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Light copies on canon imageRunner 3170i


No, but if you put a yellow plastic sheet under your document you will be surprised by the improved copy quality.

Sep 24, 2007 | Office Equipment & Supplies

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