ELECTRICAL COMPONENT DESCRIPTIONS
B234/B235/B236/D101/D102/D103 6-10 SM
Number Name Description
PCBs
PCB6 IPU IPU (Image Processing Unit): Contains
large-scale integrated circuits that process
the digital data sent from the SBU. Some
processes may require enough working
memory to store a page of image data.
PCB7 Interlock Relay Board The microswitches that toggle the power to
the laser unit off/on when the doors are
open/closed are mounted on this small
board.
PCB8 LDB LDB (Laser Diode Board): The LDB contains
and controls the laser diodes..
PCB9 Lamp Regulator (Left) Controls the Xenon exposure lamp in the flat
bed scanner
PCB10 Lamp Regulator (Right) Controls the Xenon exposure lamp in the flat
bed scanner
PCB11 Laser Synchronization Detector
Board
Detects when the laser is about to start
another main scan line across the OPC
PCB12 MCU MCU (Motor Control Unit). Controls the
scanner motor.
PCB13 Mother Board Controls the memory and all peripheral
devices. The GW architecture allows the
board to control all applications, i.e. copying,
printing, and scanning. In order to add an
option (printer, scanner), the appropriate
ROM DIMM must be installed on the
controller.
PCB14 PSU-Ea PSU-E (Power Supply Unit-Engine A):
Supplies DC power for the IOB, LCT, OPU,
IPU.
PCB15 PSU-Eb PSU-E (Power Supply Unit-Engine B):
Supplies DC power for the two PSU fans, the
MCU and the Relay Interlock Switch.
PCB16 PSU-c PSU-C (Power Supply Unit-Controller):
Supplies DC power for the controller.
PCB17 Polygon Mirror Motor Control Board Controls the polygon motor.
PCB18 SBU SBU (Sensor Board Unit): Contains the CCD.
Converts the CCD output to digital before
sensing it to the IPU (Image Processing
Unit).
PCB19 SIB The SIB (Scanner Interface Board) controls
the scanner, and serves as the signal I/F
board for the IPU and MCU.
PCB20 OPU The operation panel unit interfaces with the
CPU and runs the copier user interface.
PCB21 Image Position Sensor Board
(Tray)
The image position sensor in the paper bank
that detects the edges of paper fed from the
copier paper bank (trays 1, 2, 3) for image
position correction during simplex printing.
PCB22 Image Position Sensor Board
(Duplex)
The image position sensor in the paper bank
that detects the edges of paper fed from the
copier paper bank (trays 1, 2, 3) for image
position correction of during duplex printing..
PCB23 SD Slot Board (Service) The board for the service slot (C3).
PCB24 Operation Panel The board that controls the operation of the
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