Pixma G5020 Printing Purple Instead of Black

[matthewjschultz]

All of a sudden, my G5020 is printing purple instead of black.

It's been working absolutely ok and printing actual black up until now, but today, in the middle of a sheet, it started printing purple instead of black. I'm printing out the nozzle-check pattern, and even on that, now I'm seeing purple instead of black… intermittently.

See the nozzle print example, below. The blacks are purple.

Please help!

[matthewjschultz · Accepted solution]

Follow up:

I had to do an ink flush to get it working again, which uses about half of your ink supply. Ugh.

Here's the thing, though: I'm printing in black and white, so why was the printer printing purple in the first place?

[Boogie007]

Having same problem with my TR8520,  sometimes Black and White but mostly colors, and the colors do not duplicate the original work.