Power Supply; Power Supply Route - Canon Finisher-T1 Service Manual

2.7 Power Supply

2.7.1 Power Supply Route

When the power of the host machine is turned on, 24 VDC is supplied from the host
machine to the finisher controller PCB through two power supply lines. 24 VDC supplied
through one power supply line is used to drive motors and solenoids. 24 VDC supplied
through the other power supply line is converted into 5VDC by the regulator IC (IC102) on
the finisher controller PCB and then used to drive the sensors on the PCB. Furthermore, it
is converted into 3.3 VDC by the regulator IC (IC109) on the finisher controller PCB and
then used to drive the ICs on the PCB.
If the Puncher unit, which is an optional, is installed, they are supplied to the punch
controller PCB as well.
24VDC for specific motor drives is cut off when the front cover switch (MSW101) is open.
This is not applied to the optional puncher unit and some other motors.
A block diagram of power supply is shown below.
24V
Host
machine
24VR
Front cover switch
(MSW101)
Finisher controller
PCB
(IC102)
Regulator
IC
F-2-36
24V
24V
24V
24V Motor (M103,
M104,M109)
24V
Feeder driver
5V
5V
(IC109)
3.3V
Regulator
IC
Punch controller PCB
(Puncher Unit(option))
Chapter 2
0009-2525
Motor
Motor
Solenoid
PCB
Sensors
Logic
2-37