Controller System; Main Controller; General Description; Engine Controller - Canon imageCLASS MF4890dw Service Manual

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Technical Overview > Controller System > Engine Controller > General description

Controller System

Main Controller

■ General description

The Main Controller receives print information from the Reader and ADF, Fax, and network.
Video data is created from the received print information and is sent to the Engine Controller.
READER ENGINE CONTROL
ADF CONTROLLER PANEL
ASIC
CONVERTER
ANALOG TO DIGITAL
MOTOR DRIVER
DC/DC CONVERTER
DRAM
MAIN CONTROLLER
2 Technical Overview > Controller System > Engine Controller > General description
NETWORK
WiFi NETWORK
NETWORK
INTERFACE
WiFi
FAX
MODEM
CPU
TEL
NCU
FAX LINE
EEPROM
EXT HAND SET

Engine Controller

■ General description
Engine controller is the circuit to control the operation sequence of the host machine and it is
controlled by the CPU inside the engine controller.
When the power is turned ON and DC power is supplied through the low voltage power inside
engine controller, CPU starts the printer operation control.
Then, CPU drives the loads such as laser diode, motors and solenoids etc. according to the
image data that is input by the main controller when status becomes stand-by mode.
The following is the block diagram of this circuit.
Engine controller
Fixing
assembly
AC input
Transfer roller
Toner Cartridge
F-2-3
Main controller
Fixing control
Low-voltage
power supply
CPU
High-voltage
power supply
2-4
Motor
M
Solenoid
Sensor
Switch
Laser scanner
unit
F-2-4
2-4