Outline (When The Duplex Unit Is Not Equipped) - Canon iR2422 series Service Manual

Chapter 9
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

9.3.1.3 Outline (When the duplex unit is not equipped)

9-4
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 F101
NF NF
Low-voltage
power supply
RL1
circuit
Heater drive
circuit
TP1
H1
H2
T-9-2
Option
+24Vop
power supply
PCB
+24V
+5VR
+3.3VR
Reader
controller
PCB
+5V
+3.3V
Image
Processor
PCB
+24VR
+24V
+5VR
+3.3VR
DC
SW2
controller
PCB
SW3
+24VR
+5VR
+3.3VR
HVT
PCB
+24V
F-9-6
Option
- Finisher
- Cassette feeding
module
Motor
Sensor
Option
- DADF
Control panel
Laser unit
Motor
Clutch
Solenoid
Fan
Sensor
Option
- Inner 2 way tray
Duplex unit
0028-6587