HP CM6030 Service Manual - Page 252
Scanner component
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Scanner component The bright and dark areas of a scanned document reflect different light values from the light source (CCFL), and the light emits through the lens in the scan head. When the CCD sensors receive the light, photoelectricity is produced according to the light strength. The CCD and CCB/B change the light into electricity, and then the CCD/B transmits the analog electrical signal through the R, G, B channels. The analog signal (R,G,B) is sent to the to the A/D converter, which converts the analog signals to digital signals. The ASIC reads the digital data produced by the A/D converter and then processes the read data in the inner ASIC. NOTE: The same optical system is used for the glass and ADF scans. Figure 5-47 Scanner components (1 of 2) scanned document AFE(A/D) ASIC (Mirror) light source Interface chip Printer engine Figure 5-48 Scanner components (2 of 3) AUTOMATIC DOCUMENT FEEDER ADF Feeder ADF Motor x Control Board ADF Media Size Sensors Input Tray Sensor Scan Carriage x x Scanner Controller Board Scanning Lamp CCD Driver x and Analog Processor Optical Path (Mirrors and Lens ) Carriage Drive System Flatbed Cover Sensor Flatbed Media Size Sensors SCANNER SYSTEM DOCUMENT Copy Processor Board and Formatter Scan command x Sensor signal Image Data x 206 Chapter 5 Theory of operation ENWW
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1,211
-
1,212
-
1,213
-
1,214