Power Supply; Low-Voltage Power Unit - Canon imageRUNNERC1022 Service Manual

11.4 Power Supply

11.4.1 Power Supply

11.4.1.1 Low-voltage Power Unit

imageRUNNER C1022 / imageRUNNER C1022i / Color imageRUNNER C1030 / Color imageRUNNER C1030iF
The low-voltage power PCB is to convert AC into DC covering the DC loads.
SW4
Power switch
Protective circuit
24V generation
circuit
The low-voltage power PCB is partially activated as soon as plugged in the electrical outlet. When turning ON the power switch (SW4), whole low-voltage power
supply works.
The AC power is then converted into +24V, +5V and +3.3V covering each of machine DC loads. The following are the main loads for each power.
+24V:
Main controller PCB, high-voltage power PCB, Motors, solenoids, fans, reverse unit, and ADF
+5V:
Main controller PCB, driver PCB, laser driver PCB, high-voltage power PCB, memory controller PCB, color displacement/density sensor, and control
panel
+3.3V:
DC controller PCB, main controller PCB, driver PCB, high-voltage power PCB, memory controller PCB, sensor (photo interrupter), environment sensor,
fixing unit, control panel, reverse unit, and ADF
Low-voltage power PCB
FU3901
Fuse
Noise filter
FU3801
Fuse
Noise filter
Low-voltage power circuit
Remote switch
control circuit
Zero crossing
circuit
24V ON/OFF circuit
5V generation circuit
3.3V generation circuit
Machine power supply
voltage detection circuit
Front cover detection switch
Fixing
24VA
control
circuit
RLD+
RLD-
FSRD
24VA
3.3V 5V
DC controller
/PSSWOPEN
PSOFF
ZEROX
PSREM24V
24VA
5V
3.3V
PS100V
F-11-3
Fixing unit
24VB
24VB
Reverse unit
3.3V
Pickup motor Drum motor
Driver PCB
24VB
ETB motor Fixing motor
Solenoids
3.3V
Photointerrupters
24VB
PCB
3.3V
24VB
3.3V
High-voltage power PCB
5V
3.3V
Memory controller PCB
5V
CPU
(IC1001)
24VA
Fan
Color displacement/density sensor
5V
Laser driver PCB
Environment sensor
3.3V
Photointerrupters
ASIC
(IC1010)
3.3V
Main controller PCB
5V
Control panel
Chapter 11
0020-2570
Scanner motor
ADF
11-7