Canon MF4500 Series, Service Manual

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Technical Overview > Controller System > Engine Controller > General description
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.
NETWORK
NETWORK
INTERFACE
FAX
CONTROL PANEL
ENGINE
CONTROLLER
DRAM
MAIN CONTROLLER
EEPROM
READER
ADF
CONVERTER
ANALOG TO DIGITAL
MOTOR DRIVER
DC/DC CONVERTER
FAX MODEM
CPU
ASIC
F-2-3
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.
AC input
Fixing
assembly
Motor M
Transfer roller
High-voltage
power supply
Low-voltage
power supply
Laser scanner
unit
Solenoid
Main controller
Toner Cartridge
Sensor
CPU
Switch
Engine controller
Fixing control
F-2-4