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I have 3 used print heads for a Canon i550 ink jet printer, P/N QY6-0045. The blue ink nozzels just quit printing. No other colors are affected. Is this a user fixable item? I am a tech type person. Thanks, George J.

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  • gjanzen Aug 09, 2010

    If these printheads are defective, what is the nature of the defect and what causes it? Can that be prevented?

  • gjanzen Aug 09, 2010

    Thanks so much! That was the specifics I was looking for.

    George

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Hi George, well when this happens usually there is a fault in that particular Drive circuitry for that particular Nozzle. It's getting bad Voltage from the Power supply, and this is what's eventually destroying the Ink Nozzles, time after time.
Unfortunately, with a unit such as this, really they cannot be economically repaired. Unless of course one could get a 2nd hand unit for spares, and swap out the Power Supplies, and that may fix your problem.
The BEST thing to do, would be to obtain a new printer.

Posted on Aug 09, 2010

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I have try several methods of cleaning print head and waste a lot of time on this, finally here some suggestions:
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