I have replaced the printhead, following your instructions, several times but the error message still occurs and will not let me even use the menu button. The red light on the "M" ink cartridge blinks slowly instead of staying on solid. By the way, your instructions left out a step: remove all the ink cartridges before lifting the print head lock lever.
This error message came on as i was using the printer to print and i had not removed the print head or replaced any cartridges.
I have tried every thing you have suggested and all I get is the error message, seems like this is programed into the printer, why should the print head prevent the printer from being used as a scanner, this is very dissapointing. I am 74 years old and find this very hard to believe. I am the only one using this printer and rarely print anything, I do use it as a scanner but almost never print. I have now a unit, MX892, that is completely useless, the warranty is expired and I have accumilated about 25 spare ink cartridges that are now worthless.
This was the very best printer I ever owned and I was proud of it, now I think Canon is a rip off company finding ways to make sure people have to buy new equipment when they should not have to, I have been buying Canon products since I got into photography in the '50s and always trusted Canon, but after reading and experiencing this "wrong print head" error message U052 I am changing my mind about Canon. I will pray for you, and in short while I'll be in Heaven asking the Lord to give you the grace to treat people with Love and fairness.
God bless and guide you
The response I got from Canon was: "Buy a new printer. We'll give you 10% off the list price as part of our Customer Loyalty Program." Of course, Amazon and Staples sell the same printer for 50% off the list price, so loyal customers pay a lot more. I doubt the class action suits will do much better.
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.