HP Officejet Pro K550 Printer - Manual (Page 43)

6. Wipe the electrical contacts on the printhead but do not touch the nozzles.
NOTE The electrical contacts are small copper-color squares, grouped on one face of
the printhead.
The nozzles are on a different face of the printhead. Ink will be visible on the nozzles.
CAUTION Touching the nozzles can cause permanent nozzle damage. Also, ink can
permanently mark clothing.
7. After cleaning, place the printhead on a sheet of paper or paper towel. Make sure the nozzles
are facing up and are not in contact with the paper.
8. Clean the electrical contacts in the printhead slot inside the printer with a clean, dry, soft and lint-
free cloth.
9. Plug in the power cord and turn on the printer. The control panel should indicate that the
printhead is missing.
10
. Insert the printhead into its color-coded slot (the label on the printhead must match the label on
the printhead latch). Press down firmly on the printhead to ensure proper contact.
11
. Pull the printhead latch all the way forward, and then press down to ensure that the latch is
properly engaged. You might have to apply some pressure to engage the latch.
12
. Where necessary, repeat the above steps for the remaining printhead.
13
. Close the top cover.
ENWW Maintaining the printheads 35