I occasionally saw banding like that on prints from my 2200 as it got to be older (though never on only part of the print, but on the whole thing - but I suppose that could happen if only one ink color is bad). I found that sometimes a nozzle clean wasn't enough, I had to go through the print head realignment maintenance routine. At least start by doing a couple of nozzle cleans and one head realignment; there's a good chance that will fix your problem.
Lisa