I mentioned this problem a few years ago and not even Jonathan Wienke could solve it.
The yellows from my 7600 are often contaminated with cyan, resulting in distinctly green yellows. I do a nozzle check and there are no gaps. Everything seems to be okay, except the yellows show a subtle green tinge.
I've resorted to enlarging the canvas size of my images and placing a pure yellow bar acroos the top. As I closely watch the progression of the printing, if the yellow bar looks decidedly green, I abort the printing, then go through a nozzle clean and print out a pure yellow square, 5x7' on an A4 piece of plain paper.
If the square is green, I clean again. When I see a pure yellow, I make my print. Everything's fine and apperas to be a close match to monitor.
The following morning, I print the same image with yellow bar across the top and the same problem occurs. The yellow bar is pale green.
But there's something even more weird. When this problem first occurred, it was brought to my attention because the prints were decidedly lacking in yellow. There was a strong blue cast. I contacted the Epson maintenance guys and they guide me through a Power Cleaning routine, which fixed the problem.
Today, when I continued printing the whole print, despite the fact that the initial yellow bar was green, the final print looked instinguishable from a previous print with a saturated yellow bar, even though the scene is a landscape with a large yellow component.
What's going on? Anyone got an idea?
Edit: To clarify, I have two prints of a rural scene with lots of yellow. Both prints are indistinguishably the same regarding color and tonality, yet the added yellow bar at the top of one print is clearly green but the bar on the other print is clearly yellow. Am I slowly going mad?
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the logic brd on the print head is dying. getting incorrect voltage information.
been my experience with epson printers owning over 5 of them
7000 bought it used for $100 bad head fixed it my self, 2 x 9800 1 used 1 new , used bought refurbished it and sold , same thing7600, 10000. plus my newest one a 7800 new got it for $2280 after rebates
every print head that i ever replaced started out doing what u described. evently from doing a deep cleaning it will cause the problem to get worse. eventually when the power is on ink will just run out of the head. turn the power of and the ink stops running
print heads i beleive dont go bad its the logic board in the print head that goes bad
its mixing the inks incorrectly chips or what ever are going bad .
unfortently u cant just buy the board u have to buy both the head and board. it comes as a hole unit. the board can be removed thow from the head and another put on it, ie used epson print heads and parts. life of a print head or board is about 12,000 sq/ft of material from my own experience.
cost to repair. head $550, new dampers, $150 plus the techs labor 3 to 4 hrs
at $30 to $125 per hr.
or u can try to repair your self, its not difficult i did it 4 times. i had a epson tech that free lanced, and he helped me out several times $30 per hr plus food and drinks. he left the state 6 months ago. looking for a new one.
i'm thinking of throwing a ad on craigs list for a independent epson tech
a lot of the techs work on other brands as well, roland, mutoh, hp,mimaki
if u decide to have a authorized epson repair firm repair your printer. herre's a easy way to find out if u are being over charged.
ask how much to replace the head , dampers and aligh it all. u all ready know what the parts cost. then ask how long its gonna take to fix it, then ask them there labor rate. now u do the math
also expect to go thru at least 1/2 to 1 full set of cartriges and a waste tank as part of the repair costs. also tell the tech to reset the counter on the pump. if he dosent and u dont know how to do it that will be another charge for him to come out again. a good tech will do it as one of the last things before he leaves.
ed
