Epson p700 prints narrow vertical section in center

[mbarath]

I recently purchase an Epson p700. I print wirelessly from my iMac through Photoshop. Everything worked flawlessly initially. Now, however, after printing one or two jobs, the printer begins printing a one-inch vertical strip in the middle of the paper. It continues to print the small strip on subsequent jobs until I shut down the printer and restart. Then, usually, it prints the entire image but only a couple of times. Any ideas?