Was having difficulty with the Pixma Ix 6820 and B200 errors followed by 1403. I found a comment on another website that B200 and 1403 errors can be caused by a corrupt printer driver. Since I live in SWFL where power blinks are fairly common, I tried it. Took three tries of downloading ad installing, but the past two weeks or so, I've had no errors. I also changed the connection to an wired ethernet.
As I was having so much trouble, and this model does work for me with limited rustration over the fact that non standard paper sizes are limited to 2 selections, I bought another one. I figured it was insurance against being without a printer at a critical time. It's the same model as I have ink and didn't want to have to change carts.