Canon iR5055, Service Manual

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Chapter 4
4-1
4.1 Construction
4.1.1 Construction and Mechanisms
0015-4355
iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
The machine's main controller block consists of the following and has the following functions:
T-4-1
F-4-1
4.2 Construction of the Electrical Circuitry
4.2.1 Main Controller PCB
0015-4356
iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
The following is a diagram showing the major control mechanisms of the main controller according to connectors:
Item Description
Main controller PCB 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.
SRAM Retains service mode settings (by SRAM), HDD management information
Image memory (DDR SDRAM) Temporarily retains image data (1024 MB)
BOOTROM Stores boot program
HDD Stores system software, retains image data for
Box/Fax function (40 GB)
USB port x 2 USB2.0 interface
Ethernet port (10/100Bsae-T) Ethernet interface
Video PCB Pixel/line conversion, laser scaner motor control
Main controller PCB
USB port (H)
PCI expansion board
DC controller PCB
Reader Unit
HDD
Boot ROM
SRAM
Image memory
(SDRAM)
Ethernet
10/100BASE-T
USB port (D)
Video PCB