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6. Two pulley-driven drive rollers, one on each side of the scan window, are located on the
bed of the scanner. Applying pressure against these two drive rollers are two free-turning
rollers mounted in the lid of the scanner.
7. Three light sensitive sensors determine the position of the document.
3.1.3 Document Illumination System
The Document Illumination System employs one green florescent imaging lamp along
with a ballast. The Video Board controls these. Their purpose is to shed an even stable light on
the document.
1. The Video Board controls the imaging lamp.
2. One green florescent imaging lamp provides the light.
3. The florescent lamp operates with a 25 KHz high frequency solid state ballast, operated
on a linear voltage of 120 V D.C.
3.1.4 Camera System
The Camera System is comprised of the CCD Cameras, the Video Board, and the
Calibration and Line Splice Board (CALSB).
1. The CF XXXX/44 employs from three to eight CCD cameras.
Model # of Cameras
CF300 3
CF400 3
CF500 4
CF1000 8
2. The Video board converts all video analog signals to digital signals and corrects for gain
and offset.
3. The Calibration and Line Splice Board (CALSB) splices the scanning line together,
camera by camera.
3.1.5 Data Handling System