Start-Up Sequence - Canon imagerunner C5180 Service Manual

Chapter 5

5.3 Start-Up Sequence

5.3.1 Overview
The system software used to control the operation of the machine is stored on the HDD.
When the machine is started up, the CPU on the main controller PCB reads the system software from the HDD
into the image memory (DDR-SDRAM) of the main controller PCB for use as instructed by the boot program
of the boot ROM.
The following screen remains on the control panel white the CPU is reading the system memory from the HDD
into the image memory (DDR-SDRAM), with the bar indicating the progress of the startup sequence.
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Never turn off the main power while the progress bar is indicated. The CPU is accessing the HDD, and
turning off the power can cause a fault (E602) on the HDD.
5.3.2 Start-Up Sequence
Start-Up Sequence
<Boot Program Area>
-Boot Program (interval 1)
The boot program is executed by the CPU on the main controller PCB when the main power switch is turned
on, making checks on the image memory (DDR-SDRAM) and the HDD condition.
An error code will be indicated if a fault is detected. If the check ends normally, the control program is read from
the HDD to the memory.
<Control Program Area>
-Control Program 1 (interval 2)
1.The individual devices (i.e., hardware components on the controller PCB) are checked and initialized.
2.If the engine was not previously turned off appropriately (i.e., by performing its shut-down sequence), the
system files are repaired as necessary. (The engine may need an extra time when starting up.)
3.The individual program modules are initialized.
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