Hi. I’ve just installed piezo pro inks in my 7900. It had been sitting with piezoflush in the lines for several months (and had clean nozzle check with piezoflush when I installed that). On starting it up again there were a number of channels almost completely missing on the nozzle check; I assumed that’s just because the piezoflush had pulled back a little from the nozzles while it was sitting for a few months. So I ran a standard clean and the nozzle check came up fine.
I then did an init fill with piezo pro inks (made sure all cartridges were properly primed with no visible air bubbles). The first nozzle check had a few missing in various places so I ran a standard clean, which resulted in only one nozzle position missing.
I then printed a couple of A4 pages of quad tone purge files (all channels), and noticed some banding toward the end of that, so I ran another nozzle test. More (random) nozzles missing. I then ran a power clean, but still resulted in various nozzles missing.
Just in case, I have done all the standard maintenance cleaning as in Dana’s video, run another standard cleaning cycle, but still getting some random nozzle dropouts.
Any suggestions? My guess is maybe dampers? I had hoped they would be alright having been sitting in piezoflush for quite a few months.