Canon kit-A1 Service Manual page 15

When the control panel power soft switch is turned on, the CPU on the system controller When the control panel power soft switch is turned on, the CPU on the system controller
PCB executes the self diagnosis program stored in the ROM. PCB executes the self diagnosis program stored in the ROM.
The self-diagnosis program checks the condition of the main memory and the hard disk The self-diagnosis program checks the condition of the main memory and the hard disk
drive, and any presence of a fault is indicated by means of an error code in the control panel. drive, and any presence of a fault is indicated by means of an error code in the control panel.
COPYRIGHT © 2000 CANON INC. COPYRIGHT © 2000 CANON I
Main memory (DIMM) Main memory (DIMM)
System System
area area
CPU CPU
Self- Self-
diagnosis diagnosis
program program
BOOT ROM BOOT ROM
Main controller PCB Main controller PCB
Access to the program at time of execution Access to the program at time of execution
NC. 2000 2000 2000 2000 2000 2000 2000 2000 CANON NW Multi-PDL P. kit-A1 REV.0 SEPT. 2000 PRINTED IN USA CANON NW Multi-PDL P. kit-A1 REV.0 SEPT. 2000 PRINTED IN USA
Image data Image data
area area
Boot Boot
program program
F02-201-02 F02-201-02
CHAPTER 2 OPERATIONS CHAPTER 2 OPERATIONS
Hard disk drive Hard disk drive
2-3 2-3