Ricoh D009 Service Manual page 556

Board Structure
Scanner Motor
Controller: The GW Controller controls memory and all peripheral devices. The NCU
(Network Control Unit) and USB 2.0 are built into this control board.
FCU (Facsimile Control Unit): This option controls fax communications and fax features.
ICIB (Copy Data Security Unit): This option provides copy protection of sensitive
documents. Once a document is copied or printed with an RCPS or other printer driver that
supports this function, the hard copy cannot be copied on a copier that supports hard copy
protection.
IOB (Input/Output Board): The IOB uses the new eI0 chips and handles the following
functions.
Drive control for the sensors, motors, and solenoids of the main unit
PWM control for the high voltage supply board
Serial interface with peripherals
Fusing control
Paper feed control
The IOB is located behind the rear covers for easy access. The same IOB is used for all
models but the DIP switches must be set correctly for each model. (
Supply)
LDB (Laser Drive Board): Holds the laser diodes. The board and diodes are controlled by
the GAVD Type-R mounted on the BICU not the LDB itself.
MB (Mother Board): Interfaces the BICU with controller and the optional FCU.
OPU (Operation Panel Unit): Controls operation panel and display.
PSU (Power Supply Unit): The improved PSU on this machine consumes less than 1 W
when the machine is in the energy save (low power) mode.
SBU (Sensor Board Unit): Receives analog signals from the CCD (now encased in plastic,
not ceramic) and converts them into digital signals.
SIO (Scanner In/Out): Controls the scanner motor and exposure lamp.
SCNB (Scanner Connector Board): Relays the SIB passes signals between the BICU and
the scanner unit components, and transmits video signals from the SBU to the BICU. This
board is used only for the monochrome scanner model.
D009/D011/D012/D013 6-6
High Voltage Power
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