MAXIFY GX7010 lines when printing black ink

[Anonymous]

My Canon Maxify gx 7010 prints with blurry lines. I ran a printhead test and the result was incorrect on the black screens, as you can see in the image. I've cleaned the printhead at least six times, performed all necessary maintenance except for flushing the ink, and the maintenance cartridge is new. I don't know what it could be.

[Arthur]

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