We have a section on small format printer maintenance at
You will see the capping station in the video.
The print head rests on it when it is not printing and cleans itself on it.
Piezography Digital Negative prints much higher resolution than ABW. It prints the dots between the Epson dithering dots. But, in any event, you can not print Piezography with missing nozzles. In your case, you have a whole swath of missing nozzles and that implies that there is gunk under your printer head. It can be left behind by a dirty capping station of the wiper blade. It is very typical of that situation. So watch the entire video and try the cleaning procedures and let us know if it works.
If it does not and you have a blockage and this blockage had no effect on ABW negatives, it will have an effect on Piezography printing. Piezography requires a printer of the highest standard. You can try injecting PiezoFlush into the print heads as we instruct. if that does not clear it - make sure that your cartridges are vented correctly (you can install Epson carts) and print the nozzle check and send that to us to see.
But, somehow you need to free your print head. I think I have covered all of the possibilities in this reply for you to try.