Canon iR4570 Series Service Manual page 180

- While the Self-Diagnosis Program Is Being Executed
Image memory (SDRAM)
System
area
CPU
Self diagnosis
program
BootROM
Main controller PCB
: access to the program during execution
: access for checking
F-4-11
- While the Boot Program Is Being Run
Image memory (SDRAM)
System area Image data
CPU
Self-diagnosis
program
BootROM
Main controller PCB
: access to the program during execution.
: flow of the system program.
F-4-12
Image data
area
Boot
program
area
Boot
program
HDD
System
software
HDD