Dell 3115cn Service Manual page 727

FAX System (Detail)
Scanner
Scanning
Lamp
Control circuit
DA
conversion
(modulation)
Control circuit
AD
conversion
(demodulation)
Printer
Printing
Version 1 2006.11.21
Original
CCD
Digital signal
Modem
A/D conversion
unit
NCU
Analog signal
Modem
NCU
A/D conversion
unit
Digital signal
Print
6 – 14
Chapter 6 Principle of Operation (Fax)
Original
Image
Sending FAX
Telephone line
Receiving FAX
Black becomes 0,
white 1 creating ...
1 1 1 1 1 1
1 0 0 0 0 1
1 0 1 1 1 1
Digital data
Gnb06028KA