Yes since launch of this and the first gen I have taken care of more than these than i can count. Since the 3480 is a second gen, the process unit improved and some measures were taken to stop toner from blocking the sensors. If it is a true toner block then be prepared to be careful and find the root cause. The first gen liked to puke and leak toner on these. Not so much of a problem on this second gen.

The C5000 blows the doors off this machine in quality and high toner use performance. The C5000 drums do not over project and develop quality problems due to high color demand. Have a chat about C5000 improved quality and old business color that was designed ten year ago. You might be surprised what doors open up.