1. PCBs
No.
Name
Description
3
FDU (Facsimile Driver
Unit)
This board contains drivers for the motors, a dc-dc
converter, the energy saving mode cpu, and other drive
electronics.
2
FCE (Facsimile Control
Engine)
This board controls the machine. It contains the main
cpu, flash ROM, system RAM, and so on.
5
NCU (Network Control
Unit)
This board contains a relay and switches for interfacing
the machine to the network and the handset.
1
OPU (Operation Panel
Unit)
This board controls the operation panel.
7
PSU (Power Supply Unit)
This board supplies power to the machine, and
switches the fusing lamp on/off.
15
LDDR (Laser Diode
Driver)
This board drives the laser diode.
14
Power Pack
This supplies high voltages to the corona wire, transfer
roller, and development bias terminal.
9
Contact Image Sensor
and Xenon Lamp
This sensor reads and converts the light reflected from
the document into an analog video signal. It uses an
RMLA (Roof Mirror Lens Array) sensor unit.
The xenon lamp which illuminates the document is
contained in this unit.
16
IC Card
This contains a DRAM which is used as page memory
for 400 x 400 dpi printing of incoming B4 faxes.
2. Motors and Clutches
No.
Name
Description
6
ADF Motor
This stepper motor drives the scanner.
10
Main Motor
This brushless dc motor drives the drum, fusing unit,
development unit, and CTM.
12
Paper Feed Motor
This stepper motor drives the registration roller and the
paper feed mechanisms in the cassettes.
8
Hexagonal Mirror Motor
This high-speed dc motor drives the hexagonal mirror
in the laser printer optics.
41
Ozone Fan Motor
This removes ozone-laden air from the vicinity of the
drum, and filters out the ozone.
29
Cooling Fan Motor
This cools the interior of the machine.
4
Scanner Motor
This stepper motor drives the book scanner.
11
Paper Feed Clutch
This transfers main motor drive to the cassette and
bypass tray paper feed mechanisms.
May 22nd, 1995
OVERALL MACHINE INFORMATION
COMPONENT LAYOUT
1-9