Xerox WorkCentre 6505

Phaser 6500/WorkCentre 6505 Service Manual Xerox Internal Use Only 2-71
Theory of Operation
Fax
Fax Overview
A Fax is a device that sends and receives image data using either an analog or a
digital telephone line. The WorkCentre 6505 MFP supports Super-G3 analog Fax,
as discussed in this overview.
The three basic units of a Fax are the Scanner (for reading the image), the Control
Circuit, and the Printer.
s6500-088
CCD
111111
111111
100001
100001
101111
101111
101111
101111
100011
FAX System (Detail)
Scanner
Scanning
Lamp
Original
Original
Black becomes 0,
1 white, creating...
Digital dataImage
Control Circuit
Digital Signal
Modem
DA
Conversion
(Modulation)
A/D Conversion
Unit
A/D Conversion
Unit
NCU
NCU
Analog Signal
Sending FAX
Telephone Line
Receiving FAX
Control Circuit
Modem
AD
Conversion
(Demodulation)
Printer
Digital Signal
Printing
Print