Since I think we've got at least a couple people here very familiar with printers, I figured I'd float this here before going to a specialist forum... We've got a Xerox Phaser 7500 (12x18" color laser ...

I've got an Oki C6100 printer that I've been using for a while, and recently had to replace both the black toner AND drum at the same time. Ever since, black has not been printing at all correctly.