07-21-2013 08:20 PM
Please try the following to resolve the issue:
Remove the Ink Tanks
Reseating the Print Head
Installing the Print Head
Re-Installing the Ink Tanks
Insert ink tanks into the print head.
NOTE: Press the mark <PUSH> on the ink tank firmly until you hear a click.
The above illustration depicts ink tanks being installed in an MX850.
Ensure that all the ink tanks are installed properly and the ink tank lamps light red.
<1> The ink tanks are installed properly.
<2> The ink tanks are not installed properly.
07-25-2013 12:24 AM
Hi karl1, Thank you for sending the visual instructions to solve the "type of print head is incorrect..." problem. By the way the LCD screen with the error message had "U052" on it, if that is any help. I think I followed the instructions correctly, but the same message comes up again and nothing prints. I should also tell you that I before the problem occurred I tried to update to the latest driver for the MP520, if that is any help.
07-29-2013 09:09 PM
Since reseating the print head did not resolve the issue, I would recommend using the Contact Us link to get in touch with our support staff as it would appear that the unit would require service. They can inform you of any available service options.