HP 7800 - Manual (Page 14)

Note Do not touch the ink nozzles or the copper-colored contacts, and do not
re-tape the cartridges.
To insert the cartridges
1.
If you are replacing an HP Black, HP Photo, or HP Gray Photo cartridge, push
down and pull outward on the cartridge in the right stall to remove it.
2. Hold the new cartridge with the label on top. Slide the cartridge at a slight upward
angle into the right stall so the copper-colored contacts go in first. Gently push
the cartridge until it snaps into place.
Caution To avoid print carriage jams, make sure the print cartridge
snaps securely into place as you insert it.
3. Repeat the previous step to install the HP Tri-color cartridge in the left stall.
4. Lower the main cover.
5. Important: Align the print cartridges. For instructions, see Aligning the print
cartridges .
Aligning the print cartridges for maximum results
It is important to align the print cartridges whenever you install or replace a print
cartridge. Aligning the print cartridges allows them to perform with maximum results in
print speed and quality. For instructions, see
Aligning the print cartridges .
When you are not using a print cartridge
Whenever you remove a print cartridge from the printer, store it in the print cartridge
protector. The cartridge protector keeps the ink from drying out when the cartridge is
HP Photosmart 7800 series User's Guide 11