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2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 7 EXTERNALS AND CONTROLS
7-4 P
2.2 Operation
2.2.1 2-Speed Control
Some of the machine’s fans are controlled for two speeds (F07-202-01); the voltage
switching PCB of each fan changes its output voltage to switch between speeds.
F07-202-01
2.2.2 Sequence of Operations
F07-202-02
Voltage
switching
circuit
CPU
DC controller PCB
Fan
24V or 12V
Clock signal
Full speed
signal
24V 12V
Half speed
signal
Control panel switch ON
Main power switch ON
Control panel
switch OFF
Developing fan
(FM1)
Electrical unit fan
(FM3)
Fixing assembly
(FM2)
Curl reducing fan 1/2
(FM4/FM5)
Warm-up
Printer unit state
Standby
Printing
Low-power
Door open
Jam
Print end
: full speed.
: half speed or at rest; if the polygon mirror motor (M10) is ON, half speed; if OFF, at rest.
+1
*1: Rotates for 30 sec after the leading edge sensor goes ON during printing; if the sensor goes ON for
a second time during the 30-sec period, rotates for another 30 sec.
Initial multiple rotation