Cause of error code U075

See below

Solution for error code U075

A "FINE" cartridge is the tri coloured cartridge used in your Canon printer. If it is installed incorrectly, this error message may appear. Only official Canon cartridges will display this message but that doesn't mean you can't use compatibles to resolve the issue. The slots in your Canon printer may look the same but they are geared towards identifying a colour and black cartridge.