Canon imagePRESS C1, Service Manual

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Chapter 4
4-7
4.2.3 SRAM Circuit Board
0014-1298 imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
Primary control of the SRAM Circuit Board is shown below for each IC.
F-4-5
T-4-7
4.3 Start-Up Sequence
4.3.1 Overview
0014-1299 imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
System software used to control this unit is stored on HDD.
At startup, the CPU on the Main Controller Circuit Board loads system software from the HDD into work memory (DDR-SDRAM) on the Main Controller Circuit
Board in accordance with the BOOT ROM boot program and launches it.
The screen shown in the figure below is displayed on the Operation Panel while the CPU loads system software from the HDD and during initialization (of memory
and other system resources). Progress status is represented by a Progress Bar displayed on-screen.
F-4-6
Display of the Progress Bar indicates that the HDD is being accessed. Do not turn off power during this time, as this may lead to malfunction of the HDD (E602).
4.3.2 Startup Sequence
0014-1300 imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
IC No. Function
IC1, 2 (SRAM) Saves image data management information, service mode settings data, and user mode settings data saved on the HDD
IC2
IC1
BAT1
Front
Back
Progress bar