Settings for UP OHP with Epson SC P7000

Hi all.

Saw the thread Paper Feed Adjustment to the max but still some dark bands - #9 by dtrout

I am getting these dark bands on some extremely homogenous areas of my negs. Can barely see this in the neg but shows up subtly on the pt print. Not good. So, I think I need to do those 1-meter printouts that Walke and Rafael talked about in the linked thread. But a) do not have parallels/Windows and cannot run the Maintenance software b) do not know how to do this from the printer control panel — how do I enter maintenance mode? Can’t seem to find this info anywhere.

Could someone walk(er) me through the steps please?