Canon Finisher-AB1 Service Manual page 253

Chapter 3
Finisher controller PCB
M6
UN12
[1]Shift roller unit
[2]Horizontal detection unit
[3]Paper
3)The finisher controller PCB causes M6 to rotate counterclockwise to move PS5 to standby position.
3-14
[1]
[2]
[3]
PS3
F-3-13
[4]Horizontal registration detection position
[5]Standby position
[4] [5]
PS3
M6