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COPYRIGHT
©
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 1 BASIC OPERATION
1-1 R
CCD
PCB
ADF
Scanner
motor
Reader controller PCB
Controller unit
Printer unit
Inverter
PCB
LAMP1
M400
ROM
(IC401)
CPU
(IC400)
RAM
(IC402)
IPC
(IC404)
EEPROM
(IC403)
F01-102-01 Major PCBs
T01-102-01 List of Control Items
1 Outline of Electrical Circuitry
1.1 Outline
The major mechanisms of the reader unit are controlled by the CPU on the reader control-
ler PCB.
The functions of the major ICs are as indicated in the following table.
1.2 Reader Controller PCB
Name
CPU
RAM
EEP-ROM
ROM
Description
• Controls the sequence of scanner
operations.
• Controls the original size detection
mechanism.
• Controls the CCD.
• Controls the communications with
the ADF.
• Stores service mode data.
• Stores user mode data.
• Stores control data.
• Backs up RAM data.
• Stores control programs.
• Controls the scanning lamp.
• Controls shading correction.
• Controls service mode.
• Controls the communications with
the main controller.