HP 1175C - Manual (Page 21)

HP OfficeJet Pro User’s Guide 2-11
3 Remove the tri-color print cartridge (the thicker one) from its
package and, being careful to touch only the black plastic, gently
remove both the green pull tab and blue tape covering the
nozzles.
CAUTION Be careful not to touch the gold-colored contacts.
4 Push the tri-color print cartridge firmly down into the cradle on
the left, and close the cartridge latch.
5 Repeat steps 3 and 4 to install the black print cartridge into the
cradle on the right.
6 Close the print cartridge access cover.
NOTE Both print cartridges must be correctly installed (with the green tab and blue
tape removed) for your HP OfficeJet Pro to work.
tri-color print cartridge,
part number C1823A black print cartridge,
part number C51645A