I just talked to Canon yesterday about the U052 message on my MX892. It came down to the same thing. After he suggested everything that I had already tried, he gave me the choices of a repair facility or discounted replacement. The repair would eas...
I have the MX892. The U052 Error Code about the wrong print head occured today after 1.5 years of using the printer. I tried all the suggestions. Nothing worked. It doesn't sound like there is much hope in spending any more time trying to fix it....