Canon MG6600 PGBK printing half grid in nozzle test

The Wizard

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Hi new here. Hope someone can help me. I had a printer error (b203) this week and couldn't print anything. After some Googling I managed to get it to work again after opening the printer cover whilst turned off then closing the cover whilst turning on and somehow this booted the printer back to life. Only problem is is now won't print properly using the PGBK cartridge and have large 1" blank gaps/lines when printing text documents. Other colours as well as BK cartridge is unaffected. Only thing that I can think that may have caused this was a paper jam last week. The print has been a bit blurry every since, until yesterday when it threw up the error and now half of my print is blank. Photos still print out fine so it's only affecting the PGBK nozzle.

When I do a nozzle check it only prints the top half of the PGBK grid. See the link below for an image of the nozzle check printout. Presumably this is not a purge issue as it's delivering ink to part of the printer head. I've done a thorough flush using a printer head cleaning solution but it's still the same. Could it be something else? Damaged printer head?

Thanks.

https://ibb.co/kPXHOA
 
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stratman

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Welcome to the forum, Wizard.

Your nozzle check is incompletely visualized due to excessive cropping, but, it appears the print head is irreparably damaged from an electrical malfunction as demonstrated by the perfect straight line cut off of printed grid for the pigment ink PGBK. A new print head should resolve the issue.

Caveat: This may represent a logic board assay malfunction, though the odds are it is the print head. Also, an electrical malfunction can be propagated from the print head to the logic assay board and vice versa. In this case, replacing one part may result in that new part's malfunction and the only way to resolve this is to replace both parts simultaneously.

A workaround for a malfunction in the PGBK channel is to set the printer to use a photo paper setting instead of plain paper setting. For example, choosing Matte setting will use only the Dye-based inks, which yours appear to be OK*** based on your posted nozzle check. Try different settings to see what works best. FYI - Dye-based inks may not look as deep a black as the pigment ink nor will they be water resistant.

*** The darker Cyan swath may have some missing ink at the bottom, though this may be artifact. Do you see any missing Cyan?
 

The Wizard

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The reason for the cyan is because of excessive cleaning has drained my cartridge so it's almost out of ink. Thats ok. It's working fine. I just need to get some more ink. Appreciate the advice and glad that it's a printer head issue rather than the purge pump as it should be simple to replace. Do you have any idea of a part number so I can order a replacement? I think I may have damaged the printer head when I had a paper jam as I had to forcibly drag the paper out of the printer as it just wouldn't come out.
 

stratman

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The reason for the cyan is because of excessive cleaning has drained my cartridge so it's almost out of ink. Thats ok.
No, it is not OK if you print anything other than a nozzle check. Canon nozzles heat up to spit ink out. Ink acts to cool the heated nozzles. Without the coolant ink the nozzles will eventually irreparably burnout.

Beware print heads from China. All too often these are used but repackaged in counterfeit foil wrapper and box and sold as "new". Beware any print head sold anywhere as "used" or refurbished" as well without seeing a nozzle check that is perfect.
 

The Wizard

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I meant to say it's OK because I have more inks coming tomorrow and don't intend to do any printing in the mean time. Thanks for the tip.
 

stratman

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OK.

If posting a nozzle check in the future, scan or photograph the nozzle check and crop just the printed portion on the paper. We like to see the entire nozzle check for best evaluation.

Let us know what you decide to do.
 

The Wizard

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Sorry but I'm not sure what you mean. I photographed the whole A4 sheet so the entire nozzle check is visible. Don't know what you mean about being cropped. Looks fine on my browser. I can see the entire print with no cropping. Thanks anyway.
 

stratman

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can see the entire print with no cropping.
Firefox with NoScript was only displaying a closeup of part of your image. Since this is not typically an issue - either the image displays or not - once you said you could see the entire image I overrode NoScript and the entire image was displayed. Now I can see the right half of your Cyan nozzle check swath. That is typical of ink starvation - funnel shaped - usually caused by lack of ink flow from the cartridge and not a clog in the print head.

FYI - There is a file upload function built into the forum software. Click the "Upload a File" button at the bottom right of the window where you enter your post's text.
 

turtlesneeze

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Welcome to the forum, Wizard.

Your nozzle check is incompletely visualized due to excessive cropping, but, it appears the print head is irreparably damaged from an electrical malfunction as demonstrated by the perfect straight line cut off of printed grid for the pigment ink PGBK. A new print head should resolve the issue.

Caveat: This may represent a logic board assay malfunction, though the odds are it is the print head. Also, an electrical malfunction can be propagated from the print head to the logic assay board and vice versa. In this case, replacing one part may result in that new part's malfunction and the only way to resolve this is to replace both parts simultaneously.

A workaround for a malfunction in the PGBK channel is to set the printer to use a photo paper setting instead of plain paper setting. For example, choosing Matte setting will use only the Dye-based inks, which yours appear to be OK*** based on your posted nozzle check. Try different settings to see what works best. FYI - Dye-based inks may not look as deep a black as the pigment ink nor will they be water resistant.

*** The darker Cyan swath may have some missing ink at the bottom, though this may be artifact. Do you see any missing Cyan?
You solved my problem. Many thanks!
 
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