COMPONENT LAYOUT21 May, 1999
1. PCBs
NoNameDescription
2CIS (Contact ImageThis sensor reads and converts the light reflected from
Sensor)the document into an analog video signal.
5LDDR (Laser DiodeThis board drives the laser diode.
Driver)
24 NCU (Network ControlThis board contains relays and switches for interfacing
Unit)the machine with the network and the handset.
25 DIU (Digital InterfaceThis is an interface board for an optional PC Fax
Unit) for PCFE OptionExpander (not available in some countries).
26 OPU (Operation PanelThis board controls the operation panel.
Unit)
27 FCU (Facsimile ControTlhis board controls the machine. It contains the main
Unit)CPU, flash ROM, system RAM, etc.
28 G4 Interface (SiG4This is an interface for the machine and an ISDN
option)network.
29 Power PackSupplies high voltage to the charge brush roller,
transfer roller and development rollers.
30 PSU (Power SupplyThis board supplies power to the machine, and
Unit)switches the fusing lamp on/off.
2. Motors
NoNameDescription
4Polygon Mirror MotorThis high-speed dc motor drives the hexagonal mirror
in the laser printer optics.
7Main MotorThis stepper motor drives the All-in-One cartridge and
the fusing unit.
11 Paper Feed MotorThis stepper motor drives the registration roller and
the paper feed mechanisms in the cassettes.
15 Scanner MotorThis stepper motor drives the scanner.
21 Cooling Fan MotorCools the interior of the machine.
3. Sensors
No NameDescription
1Document SensorDetects the presence of a document in the feeder.
3Paper End SensorDetects when the paper in the cassette has run out.
6Paper Edge SensorDetects when the paper has passed the paper feed
components.
8Rear Upper Cover Switch Detects whether the rear upper cover is open or
closed.
9Rear Lower Cover Switch Detects whether the rear lower cover is open or
closed.
16 Registration SensorDetects when paper reaches the registration roller.
19 Fusing Exit SensorDetects when the paper feeds out of the printer.
23 Toner End SensorDetects when the toner has run out.
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ACEC
