Board Layout - Ricoh G147 Service Manual

6.2 BOARD LAYOUT

6.2.1 BOARD BLOCK DIAGRAM
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:
SM 6-5 G147