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Old Jun 5, 2004, 2:12 AM   #1
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Hi!

I have a Canon i850 printer and recently the yellow started to look
like green. It prints OK and doesn't clog but if I want to print in
yellow, I have to do a printhead clean first. It started happening a
couple of days ago.
When I don't use the printer for a day, I have to do the printhaed
clean again to have the yellow back.
From what I see the sponge is all black and this might be the source
of the problem (it mixes with yellow). But it doesn't happen with cyan
and magenta.

To let you see the problem better, I scanned the nozzle checks and a
print of a yellow block, done in MS WORD.

GIFs have about 115Kb each.

This is the link: http://republika.pl/canon_i850/


Any suggestions?

Michael
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Old Oct 30, 2004, 8:12 AM   #2
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HiYour carts are not sealing properly, allowing the ink to pool and be sucked up through the print head into the next cart. Sometomes overfilling can give the same result. Check the refill holes and use BLU-TAC instead of screws etc. ( BLU-TAC is like a chewing gum)

All the carts can be flushed out if necessary, then driec out with paper towels then refilled. I manufacture inkjet inks and come across this often. Any Qs < magink@froggy.com.au >
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Old Dec 2, 2004, 6:43 AM   #3
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Hi A second possibility;;;


The fact that all those ink tanks feed down to a ceramic plate on which each outlet to the actual head is divided by a rubber type gasket means there is a possibility of gasket failure. There is quite a lot of suction involved when head cleaning, so goodness only knows whether damage occurs or if it is a genuine fault during manufacture.

Either way you should approach your Canon dealer and rattle their cage. Hope this helps

Cheers Bob
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Old Dec 2, 2004, 9:48 AM   #4
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Quote:
Check the refill holes and use BLU-TAC instead of screws etc.
I've been using short set screws with a light silicone seal. The silicone mostly comes off with the set screw, and a quick scraping cleans everything up. It works fine, but the silicone tends to harden in the tube over time.
The Blu-Tac sounds good. I did a Google and Froogle search and it doesn't seem to be readily available. But I have a Super Glue product called Handi-Tak which seems to be about the same thing. Looks like it will work – thanks for the suggestion.

Quote:
Any Qs < magink@froggy.com.au >
I'm looking forward to learning from your expertise. For everyone who asks a question and benefits from the answer there are a dozen lurkers like me who also benefit. I would hope you answer questions and make suggestions on the board rather than handle it privately where we can't all learn.

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