emmerich
Last ditch effort I tried it and sets connection Do from terminal
Sorry I forgot about the connection setting.
1 lpinfo -v should see something like this for your RX520 (direct usb://ZP/LazerJet%20MFP?serial=42)
so it would look like this ( lpadmin -p Epson_Stylus_Photo_RX520 -v usb://ZP/LazerJet%20MFP?serial=42)
(Example)
2 add that line to the end of this and hit enter (lpadmin -p Epson_Stylus_Photo_RX520 -v )
3 should have changed the connection for the Epson_Stylus_Photo_RX520 printer
we should be connected to printer if all went well.
4 test
If you dont show your printer in 1 then we have deeper issues.
Note This is a follow up providing you didnt change your previous settings in previous post
meant to be done along with it.
Thanks for doing that