User Guide

Device functions
Device functions are divided into five groups:
●
engine control
●
formatter
●
image formation
●
laser/scanner
●
pickup and feed
The following figure is a block diagram of the device:
Output tray
Priority input tray
Main input tray
To external device
(host computer, etc.)
Scanning mirror
Laser
diode
Cleaning
unit
Fuser
unit
Primary
charging
roller
Photo
sensitive
drum
Engine power assembly
FORMATTER
ENGINE CONTROL SYSTEM
PAPER PICKUP/FEED
SYSTEM
IMAGE-
FORMATION
SYSTEM
LASER/SCANNER UNIT
BD
sensor
Scanner
motor
ECU
Pickup
control
unit
Develop-
ing unit
Transfer
charging
roller
Figure 5-2 Device functional block diagram
Engine control system (engine control unit and power-supply
assembly)
The engine control system coordinates all print engine activities. The engine control system includes
both the engine control unit (ECU) printed circuit assembly (PCA) and the power-supply assembly PCA.
48 Chapter 5 Theory of Operation ENWW