Ipu (Image Processing Unit) - Ricoh B132 Service Manual

IMAGE PROCESSING

6.6.3 IPU (IMAGE PROCESSING UNIT)

The IPU does the following:
• Controls the scanner
• Processes the image signals from the SBU and sends them over the PCI bus to
the controller memory
• Receives the image processing signals sent over the PCI bus from the controller
memory, processes them, then outputs them to the VGAVD.
• Outputs the control signals for the ARDF
• Controls the relay of power and signals
Image processing, ADS correction, and line width correction are done on the BICU
board for all the digital data sent from the SBU. Finally, the processed data is sent
to the printer as digital signals (2 bits/pixel).
B132/B200 6-42 SM