This is a Dell 5100cn, from what I can tell it is also a Xerox Phaser 6300. anyway
where there is supposed to be a grey bar with black printing in it, the grey box is darkened so much(almost black) that you cant see the words printed in that bar.
My customer happened to have a new drum imaging unit, that I put in and it made no difference. they are using oem toners. Have not been able to see if a colored bar would do the same thing.
I can not find any kind of density adjustment in the printers menu or in the properties of the driver. It's just printing too dark in those grey bars. No background, nice and white page.
The other print looks fine too, just these grey bars with the print in them, gets blacked out, will nearly blacked out.