Hello, I’m a bit of a newbie, so please bear with me. I recently purchased a used Epson 9900 which I knew had a bad PK/MK channel; aside from deep shadow areas which would have banding, color prints were otherwise fine before converting to piezo inks; this was confirmed by a nozzle check.
Talking with the Inkjetmall folks, I learned that I could use the 9 remaining channels with the Piezo Pro set of 9, filling the PK/MK cartridges with PiezoFlush to keep the unused channel cool during auto cleans and nozzle cleanings. I have cleaned the capping station, replaced the wiper blade, the flushing box and the bottom of the print head (via the Inkjetmall YouTube video instructions), run a regular and power cleaning, and yet I continue to see light stripes on my b/w prints (for some reason, I’m unable to attach photo examples to this page). Having checked the forums here, I saw one post similar to mine from a few years back, which the original poster concluded as resolved, but there are no posts or comments explaining what the fix was (efforts from that older post included updating firmware, which did not work - but clearly something eventually worked). Any thoughts? Thanks in advance!