Protection Function (Saddle Stitcher Unit) - Canon Saddle Finisher-T2 Service Manual

Chapter 2
24 VDC supplied through one power supply line is used to drive motors and solenoids. The 24 VDC power for
solenoids is supplied from the finisher controller circuit PCB without passing through protection mechanisms such
as microswitches. The 24 VDC for motors is not supplied if any of the two door switches of the saddle stitcher unit
is open.
24 VDC supplied through the other power supply line is converted into 5 VDC by the regulator IC (IC512) on the
saddle stitcher controller PCB, used to drive sensors, converted into 3.3 VDC by the regulator IC (IC10) on the saddle
stitcher controller PCB, and then used to drive the ICs on the PCB.
Front cover switch
(MSW101)
24V
Finisher
controller PCB

2.7.4 Protection Function (Saddle Stitcher Unit)

The 24 VDC power supply used for motors and solenoids is equipped with a circuit breaker (CB1). The 24V power
supply used to drive the guide motor (M3), alignment motor (M5), and the paper positioning plate motor (M4) is
equipped with a fuse designed to blow when an overcurrent flows.
2-62
Inlet door
switch (MSW1)
24V
Circuit
breaker
(CB1)
Saddle stitcher
controller PCB
(IC512)
24VR
Regulator IC
F-2-83
Delivery door
switch (MSW3)
24V
Motors
24V
Motors
24V
Motors
24V
Solenoids
5V
Sensors
(IC10)
3.3V
Logic
Regulator IC
0009-2558