MX870 Black text is looking bad all of a sudden!

[bobdirects]

Hello all, 

Newly registered, but I have had an MX870 for a long time.  Great printer, but all of a sudden it isn't printing BLACK very well at all.  I did a nozzle print...it looks acceptable.  I did cleanings, even a deep one.  

But when I print BLACK TEXT, the letters are unevenin the coloring and basically unreadable. 

If I have white text on a color background, it looks fine.  If I have blue text, it is okay.  The black is the problem.

Also, I replaced the black ink cartridges.  So it shouldn't be that.

Help?  Please?  I really like this printer.

Bob

[Michael]

Hello.

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