Canon imagePROGRAF iPF765 User Manual page 634

Replacing the Printhead
8
With the nozzles facing down and the metal contacts toward
the back, insert the Printhead into the Carriage. Carefully push
the printhead firmly into the Carriage, ensuring that the nozzles
and metal contacts do not touch the carriage.
9
Pull the Printhead Fixer Cover down toward the front to lock
the Printhead in place.
10
Push the Printhead Fixer Lever toward the back of the printer
until it clicks.
11
Close the Top Cover.
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iPF765
User's Guide