Hello Deer colleges. This is my first post, don't know maybe anybody could point int the right direction. We are trying to revive an oldish workhorse. The problem is that all colors seem to diaper occasionally. This is best seen on dark mono color pictures. We have flushed lines and ink tanks, changed filters and check valves. Low vacuum is set to 24 and is stable 0.2-3 mb deviancy. Secondary ink reservoirs levels stay under thresholds. We have also attached extra cable for high voltage lines, because the wire in wire chain looks a bit crusty. It also hapens when printing in uni-direction. I have attached picture of a problem. Maybe there is a guru who could help point in the right direction. Much ablage in advance!