Outline Of Electrical Circuitry; Outline; Reader Controller Pcb - Canon iR2200 Service Manual

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 • Controls the sequence of scanner
operations.
• Controls the original size detection
mechanism.
• Controls the CCD.
• Controls the communications with
the ADF.
RAM • Stores service mode data.
• Stores user mode data.
• Stores control data.
EEP-ROM • Backs up RAM data.
ROM • Stores control programs.
Controller unit
Printer unit
COPYRIGHT © 2001 CANON INC.
T01-102-01 List of Control Items
CPU
(IC400)
IPC
(IC404)
Reader controller PCB
F01-102-01 Major PCBs
2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 1 BASIC OPERATION
Description
• Controls the scanning lamp.
• Controls shading correction.
• Controls service mode.
• Controls the communications with
the main controller.
Inverter
PCB
ROM
(IC401)
M400
RAM
(IC402)
EEPROM
CCD
(IC403)
PCB
ADF
LAMP1
Scanner
motor
1-1 R