COMPONENT LAYOUT 30 November, 1999
1-10
1. PCBs
No Name Description
2
CIS (Contact Image
Sensor)
This sensor reads and converts the light reflected from
the document into an analog video signal.
5 LDDR (Laser Diode
Driver)
This board drives the laser diode.
23 NCU (Network Control
Unit)
This board contains relays and switches for interfacing
the machine with the network and the handset.
24 OPU (Operation Panel
Unit)
This board controls the operation panel.
25 FCU (Facsimile Control
Unit)
This board controls the machine. It contains the main
CPU, flash ROM, system RAM, etc.
26 Power Pack
Supplies high voltage to the charge brush roller,
transfer roller and development rollers.
27 PSU
(Power Supply Unit)
This board supplies power to the machine, and
switches the fusing lamp on/off.
2. Motors
No Name Description
4 Polygon Mirror Motor
This high-speed dc motor drives the hexagonal mirror
in the laser printer optics.
7 Main Motor This stepper motor drives the All-in-One cartridge and
the fusing unit.
11 Paper Feed Motor This stepper motor drives the registration roller and
the paper feed mechanisms in the cassettes.
15 Scanner Motor This stepper motor drives the scanner.
21 Cooling Fan Motor Cools the interior of the machine.
3. Sensors
No Name Description
1 Document Sensor Detects the presence of a document in the feeder.
3 Paper End Sensor Detects when the paper in the cassette has run out.
6 Paper Edge Sensor Detects when the paper has passed the paper feed
components.
8 Rear Upper Cover Switch Detects whether the rear upper cover is open or
closed.
9 Rear Lower Cover Switch Detects whether the rear lower cover is open or
closed.
16 Registration Sensor Detects when paper reaches the registration roller.
19 Fusing Exit Sensor Detects when the paper feeds out of the printer.
22 Toner End Sensor Detects when the toner has run out.
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