Scanning process control signals The CPB controls the following scanning process control signals: ADF unit and flatbed unit operation directs the SCB about the following: • when to scan • how to scan • when to activate motors • when to turn the scanning lamps on and off Image processing • color alignment • resolution conversion • image sharpening • moire removal • image scaling • shifting of data strips (reconstructing separately processed image data before CPB communication to the formatter) • RGB conversion for CPB communication • CPB communication to the formatter using one of the following formats:
• HRB (fastpath) communication with the hard drive on the formatter • PCL-XL (n-up, rotation, book mode) communication with the hard drive on the formatter • JPEG compression (when digitally sending data) communication with the hard drive on the formatter • data compression before sending to the formatter over the high speed copy connect cable Typical scanning process flow 1 The original document is placed on the glass or in the ADF. 2 The user enters job preferences using the control panel keys. The user presses the START key. Job preferences are sent to the formatter. 3 Some job preferences, such as n-up, will be held and processed later by the formatter. Others are sent to the CPB.
4 The CPB sends control signals to the SCB. The document is scanned. 5 The SCB sends scanned image data back to the CPB. 6 The CPB processes the image. 7 The CPB sends the image data to the formatter. 8 The formatter further processes the image data (if required). 9 The image data is then either printed or digitally sent depending on what the user specified at the beginning of the process. C8523-90921 Copy processor board 95