Hi azslp1842,
The printer requires all ink tanks be installed in the printer in order to print. The black ink tank that is used when printing depends on the settings in the printer driver. The printer uses the larger black ink tank when printing text on pages and when you are printing single-sided documents on plain paper. If a paper type other than plain paper is selected, or if duplex (double-sided) printing is being performed, the printer will use a combination of the color ink tanks in the unit (including the small black ink tank) to make the text or image on the page.
If the text on pages is missing, you can try performing a print head cleaning on the unit to try and get the black ink to print. If the ink still does not print, we recommend replacing the larger black ink tank in the unit.