HP Deskjet 642c Printer - Manual (Page 55)

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Windows 3.1x
• Double-click the HP Toolbox icon in the HP DeskJet Utilities
group in the Program Manager.
–OR–
• Double-click the HP Toolbox icon. It’s on the desktop when
you start your computer.
Print cartridges
Each HP print cartridge is a self-contained, plug-in ink supply.
The printer operates with two print cartridges installed: one
black and one tri-color. The HP printers and print cartridges are
designed to work together to deliver outstanding print quality
for results that are always clear, always sharp.
Replacing print cartridges
Note: When buying print cartridges, check the part
numbers referenced below carefully to make sure you are
buying the right print cartridges for your printer:
Black HP No. [15] (equivalent to C6614 Series)
Tri-Color HP No. [49] (equivalent to 51649 Series)
HP Photo Cartridge C1816
Note: When a print cartridge runs out of ink, leave the
empty cartridge in the cradle until you can replace it.
The printer cannot print with only one print cartridge
installed.