COPYRIGHT © 2001 CANON INC.
2000 2000 2000 2000
CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 2 SEQUENCE OF OPERATIONS
2-2 P
1.2 Outline for the Electrical Circuitry
1.2.1 Outline
The major electrical mechanisms of the printer unit are controlled by the CPU on the DC
controller PCB. The functions of the major elements are as follows:
1.2.2 DC Controller PCB
Name
Description
CPU
• Controls jobs, Controls operational state, Controls fixing temperature, Controls
high voltage.
• Controls toner supply, Controls paper feed, Controls print sequence, Controls out-
put
• Controls motors, Controls accessories
• Controls communication with the controller block, Controls service mode
RAM
• Stores service mode data
• Stores user mode data
• Stores control data
DIMM ROM
• Flash memory for storage of the control programs
ROM
• Mask ROM for control programs (for figure support)
T02-102-01 Control Functions
F02-102-01
CPU
(IC300)
SRAM
(IC302)
IPC
(IC309)
ROM
(IC301)
PIO
(IC303)
GATE
ARRAY
(IC334)
DC controller
PCB
Composite power
supply PCB
Drum
sensor
PCB
BD
PCB
Reader
controller PCB
Main power
supply PCB
DC loads
• Clutch
• Solenoid
• Motor
• Sensor
• Fan
• Etc.
Pickup
PCB
Laser
drive
PCB
Finisher
(accessory)
Accessories
power
supply PCB
Control
panel
Main
controller PCB
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