Christian Schaefer, can you also post the output of "lpstat -v", of "sudo usb_printerid /dev/usb/lp0", of "sudo usb_printerid /dev/usb/lp1", and your PPD file (/etc/cups/ppd/IP5200.ppd?
Christian Schaefer, can you also post the output of "lpstat -v", of "sudo usb_printerid /dev/usb/lp0", of "sudo usb_printerid /dev/usb/lp1", and your PPD file (/etc/cups/ ppd/IP5200. ppd?