We have a fairly new 320, great printer, but we seem to have some kind of problem with the electronics. What happens is one of the jets goes out, and the short works back to the boards (main and carriage) and blows them out too. I have replaced 2 main boards (and many jets) in a year and there has to be something wrong that keeps causing this. Anyone have any ideas? Could it be the heat? We are in LA so it gets hot, but by-and-large the temp is reasonably consistant. Vutek has had no ideas so far.
most of my following assumptions are based on a 3360...which is a very similar setup to my 200/600 and probably you 320 then.
on our 3360 we have cracked many resistors on our Carriage Interface Board. The original revision ones did not have any heat sinks on them. What we did was add heat sinks, and a fan that blows directly down onto the resistors. This helps keep there temperature down. They directly control the electrical pulse which tells the head to fire.
when you say a head goes out do you mean stops firing completely or just clogs and starts printing bad? If it's completely out it could be the resistors or the pixel boards which Vutek has released a free upgrade for.
can you give more detail about the problem? Is it always the same jet or different jets? I don't think it is ambient heat causing this problem.
As my tech explained it to me, the main board went bad, sent a wrong signal to the Voltage regulator board, which, in turn, fried both the 2 Jet Packs and the planter board. Aaaaaarrrggg. Big dollars. So we replaced the Main board, the Planter board, and the Jet Packs and everything prints perfect. I then decided to replace the voltage board just in case something in that board caused this trainwreck. The printer is back to form (very nice prints), but I want to make sure that I do everything possible to prevent a repeat of this mess.
Based on Pressvu 200/600's ( over 1.5millon sq/ft each ) and 2360 and 3360.
Unfortunately you may not be out of the woods yet. Do you have ink spilled on the backplane board ( you may have listed it under another name )( large horizontal board in the carriage that everything plugs into. Some boards do not have a good silicone or other coating over the componets and ink can work itself into the circuits and short. I would check this but also check every head for over temp and or shorted heater.
Since you say all is fine and after the problem occurs , it will be trial and error.
