ECOTANK ET-7750 ink contamination or something else?

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Just as a further aside, I just remembered that the Epson reservoir designs are more aimed at not allowing ink to leak out of the vent channel. There is absolutely no pressure offset like the standard CIS Marriott bottle design so the Ecotank printers are sensitive to there being too much ink in the reservoirs.
 

Ink stained Fingers

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I don't think so, I have/had verious L.. and ET.. printers in use and took some apart, the air is fed to the bottom of the ink container, that's below the nozzle plate level, there is a pressure differential of a few cm, but this only works as long as the refill openings are closed during operation, with a rubber plug or with the cover on the ink compartment.
 

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Dangit... Ok... thanks for the catch... I'll have to go back to my photos and work out what I was seeing..
 

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hello again! you all your help was resolutive. I bought cleaning solution and with cotton-bud I cleaned all parts that were dirty. the resolution was immediate. no more spots nor color cross contamination. thank you very much, without your taughts I wasn't enough sure to do it.

thank you again


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