Power Supply System; Power Supply; Outline; Rated Output Of The Power Supply Pcb - Canon ImageRUNNER 1022iF Service Manual

Chapter 9

9.3 Power Supply System

9.3.1 Power Supply

9.3.1.1 Outline

/ / / / iR1018 / iR1018J / / iR1022A / iR1022F / iR1022i / iR1022iF /
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 DC controller PCB, image processor PCB, anlog
processor PCB.
There are two types of +24 V voltages: +24 VR which is normaly supplied from the low voltage power supply and +24 VU which is cut off when the left door is
opened. The +24VU is supplied to the DC controller PCB and main motor. The +24 VU also plays the role of a door open detection signal (DOPEN). This signal
allows the CPU to detect that the left door has opened.
Part Name
Power supply PCB
Main power switch (SW1)
Interlock switch (SW2/SW3)
ADF motor
ADF solenoids
ADF sensors
Reader unit
CS unit
CS hp sensor
Reader motor

9.3.1.2 Rated Output of the Power Supply PCB

/ / / / iR1018 / iR1018J / / iR1022A / iR1022F / iR1022i / iR1022iF /
Output
Rated output voltage
Output voltage tolerance +10%, -5%
Rated output current
Overcurrent protection
trigger current
Overvoltage protection
trigger voltage
9-2
P1
Power supply PCB
SW1
To NCU PCB
F1
NF
F2
Low-voltage power
supply circuit
+3.3Vcircuit
+5Vcircuit
+24Vcircuit
ADF
+24V
+24V
+3.3V
Analog
processor
PCB
+24V
+3.3V
+3.3V
+24V
24VR 5V
24V 5.1V
+3%, -4%
4.5A 0.3A
7.0A 4.0A
32.5V 8.0V
T-9-1
Function
Generates DC power from AC power.
Supplies AC power to the power supply PCB.
Detects opening/closing of the left door and front cover, and cuts
off +24 VR.
+3.3VR
Relay PCB
+24VR
+5VR
Laser
+24VR
scanner unit
DC
controller
+24VR
Interlock
PCB
+24VU
switch
+3.3VR
+24VU
Main motor
+5VR
+3.3VR
Sensors
+3.3VR
+24VR
Cassette
+24VR
unit*3
+5V
+3.3V
Control panel
+5VS
+5V
+3.3V
Modem
+5V
PCB*1
+3.3VS
Image
Network PCB*2
+5VS
processor
PCB
+3.3V
Coin vendor*4
+3.3V
Card reader*4
+3.3V
PCL ROM *3
*1 : Only if equipped with Fax functions.
*2 : Only if equipped with Network functions.
*3 : Only if equipped with PCL functions.
*4 : Option
F-9-3
T-9-2
5VR 3.3V
5.1V 3.4V
+3%, -4% +3%, -3%
0.7A 2.4A
2.0A 3.7A
8.0V 5.5V
+24VR
Clutches
+24VR
Fan
+24VR
Solenoids
+3.3VR
Sensors
Mojular
jack PCB*1
+3.3V
+5V NCU PCB*1
3.3VR
3.4V
+3%, -3%
0.8A
2.0A
5.5V
0013-1188
0013-1189