Power Supply; 1Power Supply Route; Power Supply Route; 2Protection Function - Canon Finisher-R1 Service Manual

Chapter 2

2.7 Power Supply

2.7.1 Power Supply Route

When the power of the host machine is turned on, 13VDC and 24VDC are supplied from the host machine to the
Finisher controller PCB. 24VDC is used to drive motors and solenoids, and 13VDC is converted into 5VDC by the
regulator IC (IC107) on the Finisher controller PCB and used to drive the sensors on the PCB. Furthermore, it is
converted into 3.3VDC by the regulator IC (IC108) on the Finisher controller PCB and 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.
Part of 24VDC to drive motors is interrupted when the front cover switch (MS31) is open.
A block diagram of power supply is shown below.

2.7.2 Protection Function

The motor solenoid drive 24 VDC line has a fuse which melts when there is an over current.
2-24
Finisher controller PCB
Host
machine
(IC107)
Regulator IC
Front cover
switch (MS31)
Motor
Motor
Solenoid
Sensors
(IC108)
Logic
Regulator IC
Punch controller PCB
(Puncher Unit (option))
F-2-29
0004-4503
0004-4508