It is because you are missing and have some deflected black nozzles. It is not a big deal on that vertical test, just use the best of the black to align the other colors.I got the manual and did all the calibrations but I am still showing a big gap and not sure what to do. All of the calibrations were out of wack and I have seemed to fix them but still getting a big gap in the middle of the black( see the attached photo)
Please let me know if you have any ideas
Thanks!