Canon G7020 Not printing black

[jackson]

Worse printer I ever owned.
Couple of months ago ended up doing multiple 'ink flushes' to get decent colour and b/w; today cannot get any black (pg bk 20), at all.
Tried multiple cleanings/deep cleanings/flushes to no avail.
Anyone know what's next?

 

[Ink stained Fingers]

Do you see any bubbles in the tubing going to the printhead or is the tube for the black ink completely empty ?

 

[jackson]

I can see a bubble in one line.

 

[Ink stained Fingers]

That bubble has not reached the printhead yet and cannot be the cause of the misprints. I'm not aware of other cleaning methods for a Canon Megatank printhead, the black printhead in Germany for the G7050 is listed as the QY6-8029 as a sparepart.

 

[jackson]

Yes, the bubble is in the cyan.
Looking closer, I don't think there is any ink in the black tube.

 

[Ink stained Fingers]

I don't think there is any ink in the black tube.

With no ink in the tube it won't print. There was another thread running just recently with a similar problem ,
you may try to pull ink with a syringe in direction to the printhead as mentioned in this posting with a link to a Youtube video


https://www.printerknowledge.com/th...notorious-air-in-tube-issue.15342/post-134152

 

[jackson]

I used a syringe to pull ink up to the head, the tube is full but there is no trace of black after multiple cleanings/flushes.

 

[Ink stained Fingers]

How old is the printer - do you still have warranty ?

the tube is full but there is no trace of black after multiple cleanings/flushes.

Is the ink running back when you close the lid on the printhead ?

 

[jackson]

No warranty;the ink tube(s) empty after a time.

 

[Ink stained Fingers]

the ink tube(s) empty after a time.

That would mean that there is an air leakage into the black ink tube; I don't have an idea how that's possible, I'm not familiar with the constructional details how the tubes connect to the printhead and are sealed at this point. I think that this problem would require repair by Canon.