Outline (When The Duplex Unit Is Equipped) - Canon iR2422 series Service Manual

When the main power switch (SW1) is turned on, AC power is supplied to the low-voltage power supply circuit in the power supply PCB.
The low-voltage power supply circuit supplies +3.3 V, +5 V, and +24 V to operate the machine.
+24 V is supplied to the motors, fan, electromagnetic clutch, solenoid, etc. +5 V and +3.3 V are supplied to the sensor, etc.
There are two types of +24 V voltages: +24 V which is normaly supplied from the low voltage power supply and +24 VR which is cut off when the front cover or
the left door is opened. The +24 VR also plays the role of a door open detection signal (DOPEN). This signal allows the CPU to detect that the front cover or the
left door has opened.
Part Name
Power supply PCB
Option power supply PCB (option)
Main power switch (SW1)
Front cover switch (SW2)
Left door switch (SW3)
P1

9.3.1.4 Outline (When the duplex unit is equipped)

Function
Generates DC power from AC power.
Generates DC power from AC power for the options.
Supplies AC power to the power supply PCB.
Detects opening/closing of the front cover and cuts off +24 VR.
Detects opening/closing of the left door and cuts off +24 VR.
: AC
: DC
Power supply PCB
SW1
F1
NF NF
switch drive
circuit
RL1
Heater drive
circuit
TP1
H1
H2
T-9-3
F101
Option
power supply
PCB
+24V
+5VR
+3.3VR
Low-voltage
power supply
circuit
+5V
+3.3V
+24VR
+5VR
+3.3VR
SW2
SW3
+24VR
+24V
+5VR
+3.3VR
+24V
F-9-7
Option
+24Vop
- Finisher
- Cassette feeding
module
Motor
Reader
Sensor
controller
Option
PCB
- DADF
Image
Control panel
Processor
PCB
Option
HVT
- Duplex unit
PCB
DC
Option
controller
- Inner 2 way tray
PCB
Laser unit
System Motor
Clutch
controller
Solenoid
Fan
Sensor
Chapter 9
0028-6591
9-5