Sequence Of Operation - Canon iR4570 Series 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 / 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.
10-8
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
Fan
T-10-4
Full speed, half speed
Full speed
Half speed
T-10-5
Full speed, half speed
Full speed
Half speed
0006-5390