Theory Of Operation; Introduction Main Control Unit - Xerox DocuMate 252 Service Manual

3. THEORY OF OPERATION

3.1 Introduction
3.2 Main Control Unit
3.1 Introduction
Reflecte
Reflected
Ray Ray
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.
Cold Cold
Fluorescent
Fluorescent Lamp
Analogue Analogu
Signal Signa
Len Len
CCD CCD
Figure 3.1 Theory of Operation
Digital
Digital
Signal Signa
Mai
Main
Boar
Board 1 0 0 1 0 0
3-1
Service Manual
Hos
1 0 1 0
USB 2.0
Controller
Host