Ipu (Image Processing Unit) - Toshiba e-STUDIO4500c 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 (Auto image Density Selection) 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).
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August, 2006