Canon ImagePROGRAF iPF650 Series Service Manual page 177

Chapter 4
- Reinstall the linear scale in such a manner that it passes through the notch in the guide [1] and the notch [2] on the side plate.
[1]
[1] [2]
F-4-99
- Never touch the detection part [1] of the linear scale.
[1]
R
F-4-100
4-43