Xerox ColorQube 9303 Series, Service Manual

Page: 1735 / 1812

February 2013
8-41 ColorQube® 9303 Family
Principles of Operation
Image Processing
Digital image information from the scanner PWB passes to the single board controller PWB
and stored on the EPC memory. Storage in the EPC allows multiple copies and the image can
be modified according to the selections made by the user, such as reduction / enlargement,
copy lighter / darker or booklet mode. The image is then sent to the Fax module, the network
controller or the IME for processing or printing.
The single board controller PWB provides scanner control and processing of the scanned
image. Communications with the scanner components use an RS422 asynchronous serial
interface in full duplex mode. The link is used to send commands to the scanner to control
actions such as a document glass or scanner calibration.
The single board controller PWB has a NVM module PWB.
The NVM module PWB contains the local machine settings and the image processing NVM,
which are maintained by an integral battery.
Interfaces for foreign devices are also provided.
Component Location
Figure 1
Figure 1 External view of the scanner
Figure 2
Figure 2 Cross section of the scan carriage
CVT glass
Document glass
Rear registration edge
Right registration edge
Selfoc lens
LED Exposure
lamps
Full width array
assembly