Sequence Of Operation; Power Supply System; Power Supply; Route Of Power Inside The Printer Unit - Canon iR3570 Service Manual

Chapter 10
DC controller PCB
Full-speed
signal
Half-speed
CPU
signal
F-10-4

10.3.3 Sequence of Operation

iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /
1. Standby Mode, Sleep Mode
In standby mode or sleep mode, the heat discharge fan (front, rear; FM1/2) is at rest.
2. Printing
While printing is under way, the fans are switched between full speed and half speed depending on whether the machine is in full speed mode or half speed mode
and the reading of the environment sensor (HU1).
- Double-Side Printing
- Single-Sided Printing
Note 1:
While the machine is in continuous printing mode, the insertion of one or more double-sided prints will start the control used for double-sided printing.
Note 2:
The printing interval covers the interval up to when the fixing motor (M3) stops rotation.

10.4 Power Supply System

10.4.1 Power Supply

10.4.1.1 Route of Power Inside the Printer Unit

iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N
The machine's DC power is controlled by the printer unit power supply PCB.
The following shows the functions of the individual power supply PCBs used or accessories and the distribution of power:
Printer unit power supply PCB
Accessories power supply PCB
Main switch
Door switch
Leakage breaker
Environment heater switch PCB Turns on/off power to the cassette heater, printer unit heater, and
High-voltage power supply PCB Generate various high voltage.
AC driver PCB
Controller power supply PCB
All-night power supply PCB
10-4
24V 13V
24V or 13V
Voltage
Clock signal
switching circuit
Environment sensor (HU1) reading
25 deg C or more
Less than 25 deg C
Environment sensor (HU1) reading
30 deg C or ore
Less hand 30 deg C
Name
Generates DC power (24 V, 13 V); supplies DC power to the
controller power supply PCB and cassette pedestal.
Supplies power to the side paper deck, buffer path, and finisher.
Turns on/off the power to the AC driver PCB.
Turns on/off 24 VU1 to the DC controller PCB.
Cuts power in the event of an error.
deck heater.
Supplies AC power to the printer unit power supply PCB,
accessories power supply PCB, Supplies AC power to all-night
power supply PCB; drives the fixing system.
Supplies DC power to the 3-way unit, fax board, controller, HVT
and DC controller PCB; generates DC power (13V, 5V, 3.3V).
Generates DC power (5V,3.3V).
Generates and supplies all-night power (3 VB).
Fan
T-10-4
Full speed, half speed
Full speed
Half speed
T-10-5
Full speed, half speed
Full speed
Half speed
T-10-6
Description Remarks
Optional
0006-5390
0008-0541