Canon iPF780 Series Service Manual page 144

Chapter 4
e) Shutter Motor
Removing the Shutter Motor
1) Remove the output guide (right).
2) Disconnect one connector [1]. While releasing the hook [3] by pressing the protrusion [2], turn the shutter motor unit [4] slightly in the clockwise direction.
Remove the shutter motor unit [4] with it lifted.
[4] [1]
[2]
[3]
F-4-35
4-18