Canon iR2422 series, Руководство по обслуживанию

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Chapter 9
9-4
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 su3.3 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.
T-9-2
F-9-6
9.3.1.3 Outline (When the duplex unit is not equipped)
0028-6587
Part Name Function
Power supply PCB Generates DC power from AC power.
Option power supply PCB (option) Generates DC power from AC power for the options.
Main power switch (SW1) Supplies AC power to the power supply PCB.
Front cover switch (SW2) Detects opening/closing of the front cover and cuts off +24 VR.
Left door switch (SW3) Detects opening/closing of the left door and cuts off +24 VR.
P1
NF NF
Power supply PCB
: AC
: DC
F1 F101
SW1
TP1
H2
H1
Heater drive
circuit
RL1
SW2
SW3
Reader
controller
PCB
Low-voltage
power supply
circuit
+24V +24VR
Option
power supply
PCB
Option
- Finisher
- Cassette feeding
module
+24Vop
DC
controller
PCB
Image
Processor
PCB
Control panel
Motor
Sensor
Option
- DADF
Laser unit
Motor
Clutch
Solenoid
Fan
Sensor
HVT
PCB
+24V
+5VR
+3.3VR
+5V
+3.3V
+24VR
+24V
+5VR
+3.3VR
+24VR
+5VR
+3.3VR
Duplex unit
Option
- Inner 2 way tray
+24V