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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.




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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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You may have blocked yellow print head nozzles.

Try the printer maintenance to clear the printer nozzles.
After several deep cleaning attempts and there is no improvements in the printthen a new print head is required.
A new print head maybe expensive and it maybe more cost effective to purchase anew printer.
The Print head will contain all the nozzels for all the different colors so you cannot just replace a single color print head nozzels.

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One or more of the color cartridges may be empty.
One or more of the color print head nozzels may be blocked with dried ink.
Inkjet printers need to be used frequently to prevent inkdrying out in the print head nozzles.
If the print head cleaning maintenance routine does not clear the blockages,then print head needs replacing, but it may be expensive.
It may be more cost effective to buy a later model and better printer thanreplace the print head.

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The next step in repairing your unit after replacing the cartridges, is to replace the print head.

If you are refilling your catridges, there are many inks out there that actually eat up the nozzels in the print head.

If you need to refill, be aware that you may not end up saving money.

I use a Bulk ink system that uses ink that does no damage to the print head.

Good luck!!!

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From the Canon website:

Issue: Alarm / Power light flashes orange 8 times consecutively (Waste Ink Nearly Full Error)
Solution: Ink Absorber Replacement Options i550

Ink Absorber Replacement Options

This printer has an ink absorber that takes in ink during the printing and print head cleaning processes. The cleaning process is necessary in order to keep the print head nozzles from becoming clogged. Over the life of the printer, the amount of ink that the ink absorber has absorbed is calculated by the printer. Eventually, after substantial use, the printer will enter an error condition when the ink absorber is nearly full. At this point, printing is still possible by pressing the <Resume> button on the printer. To protect the printer from damage, you will not be able to print at all once the ink absorber is full.

Canon recommends having the printer serviced before the absorber becomes full. We are aware that there are many "do-it-yourself" Web sites that offer instructions for making this repair. Replacing the ink absorber is a complicated and potentially messy procedure. Even if the ink absorber is successfully changed, the ink absorber counter must be reset. Be aware that if you attempt this procedure, it is at your own risk.

For the Waste Tank Reset Code, and how to repair or replace the Waste Tank, see this website:

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Your problem is the print head. You can buy one from Canon for about $95, or find them new from dealers on Ebay for $60 to $70. For a less expensive fix, try to remove the print head and clean it. (You don't need any tools, just remove the ink tanks and pull the print head forward and out. Over time, the receivers tend to get dry & crusted ink on them. Note that the inks used are fast drying inks to keep your pictures, etc. from smudging after you print them. Try not to use solvent. I use q-tips and hot water, then dry using another q-tip. If this does not work, there are commercial cleaning kits available for about $10. Short of that, your choice is to replace the print head or the printer itself. My i960 prints such good quality color prints and normal color printing, that I would fix it rather than replace the printer. I hope the easy cleaning does it for you!

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1 Answer

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---Is the incrustation of the heads or the ducts such that I need to throw the i550 away

This one...

I had 3 Canon i550 and i560 printer, unfortunately if you use non original inks and leave the print head with no ink cartridge for some hours the ink can dry inside the print head = dead.

I have try several methods of cleaning print head and waste a lot of time on this, finally here some suggestions:
- use pure alchool (at least 90 °) to clean the print head, you can also use clear water but after you had to rinse with alchool because alchool removes the left water that can cause shortcircuit when you power on the print head.

- the electrical connections of the print head (brown ribbon with integrated circuit path) are very fragile if you decide to unmount the print head removing the 2 phlilips screws you must be VERY careful

- for black ,one safe trick is to remove the round (8 mm) glued upper metal sheet filter on the upper part of the print head where the ink cartridge sets. Once removed you can use a syringe needle filled with alchool to remove the dry ink and spray alchool into the small duct hole to remove all the bad dry ink. Be patien it will take some time. You can also leave the syringe filled wyth alchool and without the syringe piston for a night inside the duct hole.

Take a look to the service manual also for other inspirations:

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1 Answer

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You RINSED the printhead???

I wouldn't do that again.

Try taking a damp cloth and dabbing it against the printhead nozzels until you get lines forming on the rage from the ink (the nozzels you're having trouble with specifically).


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1 Answer

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