Ricoh B089 Service Manual page 55

This machine uses the RA2K architecture, Which allows the copier to be expanded
as an MFP by installing simple modular components (ROM DIMMs) on the
controller board.
Controller (Main Board):
Controls the memory and all peripheral devices.
SBCU (Scanner & Base Engine Control Unit):
This is the scanner and engine control board. It controls the following functions:
• Engine sequence
• Timing control for peripherals
• Operation control
• Drive control for the sensors, motors, and solenoids of the printer and
scanner
• High voltage supply board control
• Serial interfaces with peripherals
• Fusing control
IPU (Image Processing Board):
This is the scanned image processing board. It controls the following functions.
• Image processing control
• Video control
SBU (Sensor Board Unit):
The SBU deals with the analog signals from the CCD and converts them into digital
signals.
SM 1-17
BOARD STRUCTURE
B089/B093