Canon iR5000i Service Manual page 52

CHAPTER 2 MAIN CONTROLLER
When the self-diagnosis program ends normally, the boot program also stored in the boot
ROM starts to read the system software from the hard disk to write it to the system area of
the SDRAM.
The machine's system software consists of multiple modules, and the appropriate modules
needed at a specific time are called into the system area of the SDRAM for execution.
2-6 S
SD RAM
System Image
area data area
CPU
Self-diagnostic
program
Boot ROM
Main controller PCB
: Access to the program at execution.
: Flow of the system program.
F02-103-03
COPYRIGHT © 2001 CANON INC.
Hard disk drive
(HDD)
Boot
program
2000 2000 2000 2000 CANON iR5000i/iR6000i REV.0 JUNE 2001