Canon ImageRunner iR8500 Series, Service Manual, Page: 216 / 1122

Chapter 4
4-6
4.3 Start-Up Sequence
4.3.1 Outline(iR105)
0006-9769
iR105
The system software used to control the machine is stored on the HDD. The CPU on the main controller PCB reads the system software from the HDD to
write to the SDRAM mounted on the DIMM socket of the main controller PCB, requiring time before the control panel becomes ready for operation after
the main power switch is turned on.
While the CPU reads the system software from the HDD to the SDRAM, the following screen remains in the control panel, with the progress bar on the
screen indicating the changing stages of the startup sequence:
Start-Up Screen
F-4-6
4.3.2 Overview
0008-2236
iR105i/iR105+ / iR9070 / iR85+ / iR8070
The system software used to control the machine is stored on the HDD.
When the machine is started, the CPU on the main controller PCB reads the system software from the HDD according to the instructions of the boot ROM
boot program, and writes it to the image memory (SDRAM) of the controller PCB.
While the CPU reads the system software from the HDD to the image memory (DRAM), the control panel shows the following screen, using a progress
bar to indicate the progress of the start-up sequence.
F-4-7
Do not turn off the main power while the progress bar is indicated, as access is being made to the HDD. Turning off the power can cause a fault on the
HDD (identified by E602).
Progress bar
Wait…
1
Progress bar
3 2