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After a month or so of neverending tests, in conclusion we got informaiton, that it's one of two small mainboards, which controlos heads. After swaping one with another, we swaped the problem - so this is our cause. Maybe it will help someone in the future :)

Yesterday we've got spare parts arrival, so we changed the dampers on the head we blamed at the begining, but nothing changed. After that, we started to experimenting with colors, makeing rectangles of full color of each CMYK. It shown to us, that problem comes from Cyan channel. So we changed...

Hello, some time ago I described in some diffrent topic, a problem that sometimes was happening on our machine. Now from couple days now we got this problem all over again, and we cannot make any way further from it, cannot do anything about it. It looks like this. When printing dark colors...

Hello, I've got couple of basic/general quesitons, and I hope someone will be kind enough to help me out. Here they're: 1. When should I change heads, i.e is there any rule, which will say "after xxxxx Mdots" head should be changed. This question comes from very annoying behaviour of my machine...

Hello! This thing broke down today in our ValueJet 1204. Can this part be repaired in any way ? From how it look, I'd say that in some way 'vulcanised', made as one, so it's not-recovareble. But it seems silly, that if one of those is bad, whole part must be changed.. What is the name...