Power Supply; Overview - Canon Finisher-AB1 Service Manual

3.8 Power Supply

3.8.1 Overview

The machine's power supply mechanism converts the AC power from the power outlet into DC for supply to its
various loads.
The AC power is supplied to the circuit when the power switch (SW1) is turned on. It is then converted by the
circuit into the following DC power supplies; +24 V, +5 V, and +3.3 V. Both +36 V and +24 V are used to drive
the various motors; +24 V is also used to drive solenoids and clutches, while +3.3 V is also used to the ICs on
the PCBs.
Leakage
breaker
Over-current/
over-voltage
AC/DC
converter
MSW1:front door switch
MSW2:tray approach switch
MSW3:tray safety switch (front)
MSW4:tray safety switch (rear)
MSW5:staple safety switch (front)
MSW6:staple safety switch (rear)
Fuse box
PCB
SW1
(main switch)
Stitching
circuit
detection
circuit
+3.3V
+5V
+24V
+36V
Power supply PCB
MSW1
Finisher
controller
PCB
+3.3V
+5V
+24V
MSW5 MSW6
MSW3 MSW4
F-3-48
T-3-4
M21:stapler shift motor
M22:tray A motor
M23:tray B motor
M25:stapler motor
Chapter 3
accessories
+3.3V
Intermediate
+5V
tray driver
PCB
+24V
+3.3V
Transport
+5V
motor driver
+24V PCB
+3.3V
Saddle stitcher
+5V
controller
+24V
PCB
MSW2
0015-2100
Other
Motor
Solenoid
Sensor
Motor
Solenoid
Sensor
Motor
Solenoid
Sensor
M21
M25
M22
M23
3-51