COPYRIGHT© 2001 CANON INC.
2000 2000 2000 2000
CANON iR105 REV.0 JULY 2001
CHAPTER 3 MAIN CONTROLLER
3-6
When the self-diagnosis ends normally, the boot program stored in the boot ROM starts
up to read the system software from the HDD to write to the system area of the SDRAM.
When the write operation ends, the system software in the SDRAM starts up to initialize
the components of the machine (at the end of which the normal operating screen will appear
in the control panel) and, at the same time, the LED lamp of the Start key will change from
red to green to indicate that the machine is ready to accept a job.
The system software of the machine consists of multiple modules, and specific modules
as needed at specific times are called into the system area of the SDRAM for execution.
F03-103-03
1.3.3 Construction of the System Software
The system software of the machine can broadly be divided into system modules (for con-
trol) and language modules (for indication on the control panel LCD).
To upgrade the machine, you will have to upgrade both the system modules and the lan-
guage modules.
Self-
diagnosis
program
Boot
program
Boot ROM
CPU
SD RAM
System
area
Image data
area
Main controller PCB
HDD
: Access to the program during execution
: Flow of the system program
Summary of Contents for iR105 Series
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