Power Supply System; Power Supply; Outline; Rated Output Of The Power Supply Pcb - Canon iR2020 Series Service Manual

Chapter 9
When the CPU on the engine controller outputs a fan half speed signal (FAN_HALF), the fan drive voltage switching circuit supplies a +16 V fan drive voltage to
turn the heat exhaust fan at the half speed.
Fan Control Sequence
E805-0000 (Main body fan error)
When the cooling fan of the main body starts, the fan lock detection signal (FAN_LOCK) has been held at the "H" level for longer than the prescribed time.

9.3 Power Supply System

9.3.1 Power Supply

9.3.1.1 Outline

iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
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

9.3.1.2 Rated Output of the Power Supply PCB

iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
9-2
Power switch ON/
Copy start key ON
Going out of sleep mode
INTR STBY
Heat Discharge Fan
(FM1)
Registration sensor
(SR209)
Fixing Drive Motor
(M201)
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
F1 F2
SW1
NF NF
RL1
Heater drive
circuit
TP1
H1
H2
WMUPR PRINT
: Full speed (+24V)
F-9-4
T-9-1
Option

power supply

PCB
+24V
+5VR
+3.3VR
Low-voltage
power supply
Reader
circuit
controller
+5V
+3.3V
Processor
+24VR
+24V
+5VR
+3.3VR
SW2
controller
SW3
+24VR
+5VR
+3.3VR
F-9-5
Power switch OFF/
Going into sleep mode
PRINT LSTR STBY
30sec
: Half speed (+16V)
Option
+24Vop
- Finisher
- Inner 2-way tray
- Duplex unit
- Cassette feeding
module
Motor
Sensor
DADF (option)
PCB
Control panel
Image
FAX board (option)
PCB
Laser unit
DC
Motor
Clutch
PCB
Solenoid
Fan
Sensor
HVT
PCB
0011-2193
0011-2195