Canon imageRunner 2022, Service Manual

Page: 242 / 418

Chapter 9
9-4
F-9-7
9.3.1.2 Rated Output of the Power Supply PCB
0017-9316
iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018i
9.3.2 Protection Function
9.3.2.1 Protective Mechanisms
0017-5489
iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018i
The power supply PCB is provided with an overcurrnet/overvoltage protection function to automatically cut off the output voltage when a trouble such as a short
circuit occurs on in the load.
When the overcurrnet/overvoltage protection function is activated, turn off the main power switch, solve the trouble with the load, and then turn on the main power
switch.
Further, the power supply circuit has two fuses which blow to stop power supply when an excessive current flows in the AC line.
Output 24V 5V 5VR 3.3V 3.3VR
Rated output voltage 24V 5.1V 5.1V 3.4V 3.4V
Output voltage tolerance +10%, -5% +3%, -4% +3%, -4% +3%, -3% +3%, -3%
Rated output current 3.5A 1.0A 1.0A 2.0A 0.75A
Overcurrent protection trigger current 9.0A 4.0A 4.0A 4.0A 4.0A
Overvoltage protection trigger voltage 32.5V 8.0V 8.0V 5.5V 5.5V
P1
NF NF
Power supply PCB
: AC
: DC
F1 F2 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
FAX board
Motor
Sensor
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
Inner2waytray
+24V