Canon imagePROGRAF iPF8400S User Manual page 892

Replacing the Printhead
10
With the nozzles facing down and the metal contacts
toward the back, tilt the Printhead slightly forward and
insert it into the Carriage. Carefully push the printhead
firmly into the Carriage, ensuring that the nozzles and
metal contacts do not touch the carriage.
11
Pull the Printhead Fixer Cover down toward the front to
lock the Printhead in place.
12
Push the Printhead Fixer Lever toward the back of the
printer until it clicks.
892
iPF8400S
User's Guide