should I replace my printheads ? strange yellow corners

[qwertydude]

You may have had luck with one but it's no guarantee as seen here. The rubber washer is prone to deforming and letting in air. Take out the rubber washer and you'll see it isn't solid it's a hollow rubber piece. You can try cutting out your own silicone washer but the added strain it puts on the print carriage can cause problems too. It's been tried and your results may vary but for a lot of people who tried the results have been hit or miss and it only takes one bad flow issue to burn out your printheads. You may not notice it right away but under certain circumstances you'll end up with striping that won't go away even with extensive cleanings, that is a sure sign that you've burned out printheads I personally don't want to risk it especially since with two sets of carts and the german refilling method it's just about as convenient as ciss and 100% reliable.

 

[johnwarfin]

So CIS uses these washers and refilled and OEM cartridges don't.

 

[ghwellsjr]

The rubber washers are a more or less permanent part of the print head and provide the seal to whatever is supplying the ink. Canon designed them to mate securely with their cartridges. They should also seal any compatibles (but I don't recommend them). I think the problem with CIS is that there is constant motion that can make a tiny leak larger.

 

[vandestra]

Today I have bought a new canon ink cartridge. The result was that the color yellow was not printed at all. I concluded that my printhead was clogged. I have squeezed some more hot unclog fluid (which I bought on ebay) through the yellow and also through the red, because when printing the check pattern, it was not ok, (this was since september already). I also squeezed some unclog fluid from the other side of the printhead. The result is that now I cannot print any color. I must have ruined my two other colors now with that unclog liquid. I have squeezed the liquid too hard, the liquid could have been too hot or I could have damaged those cushions. Unfortunately. I will buy a new printhead. There is one more question. In October I called Canon and they said that my red was a little clogged because I did not use canon ink. I called the supplier of my ink and he said that my printhead was clogged most likely because I must have made too many prints at once. His ink was exactly the same from the same factory as the canon ink (same bath even) The truth is that I did not exaggerate in printing too much at once. But is this true ? Can I avoid the same problem when I maximize (in the printer settings) the time between 2 prints?

 

[ghwellsjr]

You have lots of question and I have lots of questions:

You have a supplier of ink that claims it comes from the same factory as Canon ink and even the same batch? I find that really, really, really hard to believe, which makes me suspicious of any thing else he would say. I have never heard of a Canon print head getting clogged because of too many prints at once. Canon printers have temperature sensors in their print heads and if you print so much that they overheat, they will stop until the print head cools down.

I'm wondering what you are doing when you say that you squeezed hot unclog fluid through both sides of the print head. Hot liquids can melt the seals inside the print head that keep the colors from mixing. It is not recommended to try to clean your print head with hot liquid, warm is fine, just not hot.

I damaged a print head after I forced Windex through it using a syringe, but I thought it was because I didn't wait long enough for the liquid to dry, even though I thought I didn't get any on the electronics. That print head then damaged my printer so be careful if you have a print head that won't print anything. Does your pigment black still print?

There are many problems that can cause the same symptom of nozzles not printing. Clogged nozzles are one problem but ink flow problems, either internal to the print head or external, are another. A third problem is a purge unit that is not functioning. The printer needs to suck on the bottom of the print head to get the ink started. An easy way to tell if your purge unit is working is to put Windex or other window cleaner or just plain water on the pads off to the right where the print head parks, close the cover and wait till the noise stops, then open the cover and make sure the liquid has been sucked away.

 

[qwertydude]

I've printed 25 8.5"x11" full photo prints and my printer aside from using an entire refill on one go came out just fine on my ip4600. The printers can take it.

 

[vandestra]

I have sprinkled some luke warm unclog liquid on the purge unit.

and the result is that I the colors are now mixed. I have cleaned and deep cleaned the print heads for about 200 ml of ink now. the results are worse and worse. I have no color left. The following picture shows the results of a print some time after, today when I print the same page, there is almost no color ink printed, only some yellow corners.

As I wrote before I have tried a new ink cartridge. I guess I will send the printer to canon and hope that they will be able to fix it for a price below 200 euro, which is the price for a new one.

 

[qwertydude]

Are you still trying the CIS? Have you read the CIS posts on here about canon? Also don't print out pages like that only nozzle checks. You still have ink flow issues, all the cleaning in the world won't solve it and you're running the risk of burning out printheads which you may already have done. Put in some fresh oem carts and see if it works. CIS systems once they get a bubble need to be reprimed.

 

[johnwarfin]

CIS systems once they get a bubble need to be reprimed.

Is there any info on "repriming" Canon CIS? The one I've been using so far no problems but thinking about converting other Canons over to CIS and may not be so lucky.