I assume you have disabled Auto Nozzle Check, a great feature in theory but which seems to be completely unreliable for most and makes the printer clean way more often than it needs to.
Oh, it's turned off... however it appears to have no affect at all. It still initiates (quite frequently) checks and cleaning.
Just yesterday there was an Epson tech guy here for on site service on my second 7900
http://luminous-landscape.com/forum/index....showtopic=34371I was hoping to drill him with as many questions possible concerning similar issues (stated on this forum) about the 7900/9900 printers. Unfortunately this guy was like an evasive politician when it came to providing answers. I wondered if this is now part Epsons tech training.
The Epson tech rep started off by asking the "symptom" questions. (apparently Epson doesn't provide him with the phone data log previous to this visit) His first prognosis was to check voltage balances between ground/hot & ground/cold for difference readings. There was ~1 volt difference between the two which lead him to put a lot of focus on this issue. In fact he made a point of saying that replacing the parts that Epson had pre delivered would most likely be a waste of time/expense, but I convinced him to do anyway.
After the parts change he did a nozzle check which showed a large number of clogs. He executed the cleaning function then attempted to make a test print. Unfortunately I was still in matte black mode and could not get the printer to switch back to photo black because the waste tank to too close to capacity and I did not have a spare....I did not have a spare because from previous experience from our 7600 I felt I wouldn't need one for several months, NOT a few weeks!
So at this point I am waiting for a overnight delivery of extra waste tanks so that I may find out if the printer has been fixed.