Board Layout; Board Block Diagram - Ricoh A-P4 Service Manual

G147
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Board Layout

Board Layout

Board Block Diagram

6
This machine employs the GW (Grand Workware) architecture, which allows the printer to be expanded
by installing simple modular components (ROM DIMMs) in the controller board or installing optional
boards in the two controller board slots.
Here is a brief summary of the boards and their functions. For more details, refer to the Point-to-Point diagram
and list of components supplied with the printer.
BICU (Base Engine and Image Control Unit)
Controls all machine functions both directly and through other control boards.
LDB (Laser Diode Board)
Powers the laser diode. Output level is controlled to compensate for changes in temperature and humidity
to maintain constant laser write intensity.
Controller
Controls memory and all peripheral devices. Two SD card slots are provided, one for servicing (firmware
updates) and one for SD card options. In addition to the RAM and NVRAM, the NIC and USB functions
are also built into this controller. The HDD unit is also attached to the controller board. The Controller Board
has external slots to accommodate the following interfaces:
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