Good day! I ask for help in solving the problem. Mimaki JV-33 printer. For three years, channels have been falling out. Fallout is sudden, can happen during printing, or can happen during downtime. A simple software cleaning returns all the nozzles to their place. Fallout does not occur as contamination of the nozzles, i.e. all the nozzles of one channel disappear at the same time. During this period, we replaced 2 print heads, three types of ink, several parking lots, damper kits, ink tract tubes, a continuous ink supply system, several pumps, a cable from the motherboard to the print head. Grounding has been checked and is present. Please help solve this problem.