Getting grey background on documents when copying

what kind of printer are you using. Is your colored ink nearly out. if so, replace it.

check printer settings or document settings back ground color settings
you can print a page color to any of the color bar settings so there is a setting that has been change to grey that is causing the problem

Giacomos,

Is the paper a shade of grey with no image? or is there an image with a grey background?
If there is a image with a grey background you should try a new toner module. If that doesn't resolve the issue, clean the xerographic drum, make 10 blank copies, if the cleaning doesn't resolve the issue than install a new xerographic module.

Hope this help.

You might be scanning and copying in full color even for regular documents. When you do this, it treats the document as a photograph or color document and therefore, the background, even if white, is scanned in as a bit yellow

A copy is a copy. you get what it sees.

I think you may be successful in scanning the picture to your hard drive, then print it in grey scale.

Double check your cables/ harness especially to the document scanner section.
If you can print internal test pages ok, without the background, then a part of the document scanner is bad. The document scanner CCD JC96-05207A which is what reads the document.
Also, there is a "shading profile" adjustment, in case you just have a little grey background.

Whit
Item, Inc

If the background color is light (yellow for example) you can probably play with the contrast and density settings to make it better, but otherwise you can't, unfortunately.

You can set it to B+W but it will revert to its default setting the next time you print.

I dont know what kind of copier you have but white vertical lines are virtually always caused by a dirty charge corona.There is usually a little plastic handle, blue, green or grey, that cleans the charge corona.pull it out ONCE, push it back in and try another copy.If you have an operators manual, it should have instructions for cleaning the charge corona.Good Luck, O'scope

I have found that when scanning b/w documents, its helpful to start with a black and white copy, not a grayscale, pen written, or printed form a printer in grayscale mode copy, but a true black and white on the copier or fax copy. The scanner doesnt read shades of black so well and when scanning multiple page documents, my pixma tends to scan in lightly. I havent found a piece of software to do just this, batch darken what has been scanned (at least not for free). Copying before scanning is the work around. Hope this helps everyone who's had this problem. It also doesnt hurt to darken what your scanning down a notch when copying