Help with Bizhub c360

My bizhub c360 has been leaving white lines and the ocasional blank spot when printing (see images attached) does anyone know what is the cause and how to fix it?

Thanks
Kieran

 

We get this all the time. It is probably a corona (red lines). Try cleaning them then do a calibration. The white dots I have seen too. A tech had to come by and fix those for us. Little things like this happens often with these machines, unfortunately. Always clean and calibrate the machine after every different run. It helps a lot.

 

Awesome thanks for getting back so quick! could you please explain which parts need cleaning & how to do a calibration?
I will see if we can get a tech out to sort out the white dots, from what I've seen online it could be something to do with the transfer belt.