Acer S2W 3300U Service Manual - Page 15

HEX SCREW LENS (4) Receiving Figure 4-5 Lens and lensbox A color CCD (charge coupled device) is applied here. It is fixed on a CCD board, as shown in Fig.4-6. The CCD is sensitive only to the intensity of the light. It will output voltage signals while the light shines. Note: The position of color CCD is mounted on a board, its position has been precisely calibrated for every scanner. The CCD board is fixed in lensbox by two screws as shown in Fig.4-6. Any deviation will seriously affect the output voltage of CCD and resulting in bad resolution for the scanner.