Xerox DocuMate 252, Руководство по обслуживанию

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Service Manual
3. THEORY OF OPERATION
3.1 Introduction
3.2 Main Control Unit
3.1 Introduction
Mai
Boar
1 0 0 1 0
Cold
Len
CCD
Analogu
Signa
Digital
Signa
Fluorescent
Hos
Reflecte
Ray
Main
Board
1 0 0 1 0
Cold
Len
CCD
Analogue
Signal
Digital
Signal
Fluorescent Lamp
Reflected
Ray
USB 2.0
Controller
Host
Figure 3.1 Theory of Operation
The reflected rays of your original as shown in the above Figure 3.1 pass through the lens
and create an image on the CCD (Charged Coupled Device). Then, according to the
different light intensity perceived by the CCD, the CCD will transfer these data into a series
of analog signals to the main board, where the signals are turned into digital signals.
These digital signals flow to the USB 2.0 Controller to transfer to a host computer.
3-1