Construction; Construction And Mechanisms; Construction Of The Electrical Circuitry; Main Controller Pcb - Canon iR5055 Series Service Manual

4.1 Construction

4.1.1 Construction and Mechanisms

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
The machine's main controller block consists of the following and has the following functions:
Item

Main controller PCB

SRAM
Image memory (DDR SDRAM)
BOOTROM
HDD
USB port x 2
Ethernet port (10/100Bsae-T)
Video PCB

4.2 Construction of the Electrical Circuitry

4.2.1 Main Controller PCB
iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
The following is a diagram showing the major control mechanisms of the main controller according to connectors:
Reader Unit
HDD
Main controller PCB
Ethernet
10/100BASE-T
PCI expansion board
USB port (H)
SRAM
Image memory
(SDRAM)
USB port (D)
T-4-1
Description
Controls system operation, memory, printer unit output, image processing, scanner
unit image input processing, rendering, color LCD
controller, card reader unit interface, fax image
processing, etc.
Retains service mode settings (by SRAM), HDD management information
Temporarily retains image data (1024 MB)
Stores boot program
Stores system software, retains image data for
Box/Fax function (40 GB)
USB2.0 interface
Ethernet interface
Pixel/line conversion, laser scaner motor control
Video PCB
DC controller PCB
Boot ROM
F-4-1
Chapter 4
0015-4355
0015-4356
4-1