Canon PIXMA MP990 Series Getting Started Manual page 10

Install the Print Head
6
Tilt the Print Head forward and set it in place as shown.
• Do not knock the Print Head against the sides of the holder.
• Install in a well-lit environment.
 Hardware Setup
7
Lower the Print Head Lock Lever
completely.
• Hold the Print Head Lock Lever firmly and
lower it gently.
• Once you have installed the Print Head, do
not remove it unnecessarily.