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PIXMA TR8520 black text suddenly prints as white


my TR8520 suddenly prints some black text as white and some as grey, none as black, but black cell borders in a spreadsheet are vivid black .. using a MacBook Air M@ 15-inch just upgraded to OS Sonoma 14.1



Product Expert
Product Expert

Hi vati999,

First, please make sure all of the ink tanks in your PIXMA TR8520 contain ink.

Next, please load letter-sized paper in the cassette of your PIXMA TR8520 and follow these steps:

1.  Please tap the gear at the bottom of the display of your PIXMA TR8520.

2.  Tap Maintenance.

3.  Tap Print nozzle check pattern and then tap Yes.

A test page will print.  Please compare your printout to the example below.

Does a black grid print to the right of |PGBK| ?

Is the grid complete? or are there missing boxes within the grid?

Below that, did 2 blue, 2 pink, 1 yellow and 1 gray bars print?


TR8520 Nozzle Check.jpg






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