Canon s9000 printhead problem3/16/2024 My principal application is for CAD work, printing out plans, (in color 13x19" superA3 size). I am satisfied that 'ink' is not the main source of my grief. I use canon ink as well as (a very good quality, and costly), second party ink. I've (carefully) cleaned and recleaned the head and each time one row of nozzles will start putting out color properly while another row will 'stop' working - its damned maddening. The head still appears to be good as there is no "secret" code blinking to indicate an internal problem. The machine works perfect accept for small sporatic ink blurps from the nozzles which add a lot of unwanted anomalies on to text and image prints - and patterned breaks in printed lines - colors appear and disappear. The ink overflow tray was cleaned previously and it did not need cleaning then the point being- the printer has very low mileage on it. My S9000 is now on the third printhead, $80.00+ a pop.
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