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Kodak G4 Concertina Effect


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Does anyone know why we'd be getting a concertina effect on our 6850 printers?

As per Darren at Tetenal then we upgraded to firmware 613 but it hasn't done the trick.  We also thoroughly cleaned the rollers hoping that would fix things.  I've tried a few times to get through to Tetenal technical dept again today but went to voicemail.  Darren and Rob are very helpful but I think they could do with some more manpower as they're flat out it seems.

Another printer is coming up with 'cooling' after a short number of prints.  I presume it's overheating.  Any suggestions on this?

I suspect they'll all need replacing but any advice would be appreciated.



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