HP 3940 User's Guide - (Windows) - Page 42

9 Maintenance ● Install print cartridges ● Align the print cartridges ● Automatically clean print cartridges ● Print a test page ● View estimated ink levels ● Maintain the printer body ● Remove ink from your skin and clothing ● Manually clean print cartridges ● Maintain print cartridges ● Printer Toolbox Install print cartridges When you need to replace print cartridges, make sure you have the correct print cartridges for your printer, and then install them in the print cartridge cradle. Print cartridges Always install the tri-color print cartridge in the left side of the print cartridge cradle. Install the black print cartridge in the right side of the print cartridge cradle. Selection numbers When buying replacement print cartridges, look for the print cartridge selection number. You can find the selection number in three places: ● Selection number label: Look at the label on the print cartridge that you are replacing. 1 Selection number label ● Printer documentation: For a list of print cartridge selection numbers, see the reference guide that came with the printer. ● Print Cartridge Information dialog box: For a list of print cartridge selection numbers, open the printer Toolbox, click the Estimated Ink Levels tab, and then click the Print Cartridge Information button. 40 HP Deskjet 3900 series