Print quality ....................................................................................... 64
Paper types ...................................................................................... 64
System setup .................................................................................... 65
Service .............................................................................................. 65
Device Polling ................................................................................... 65
Print settings ..................................................................................................... 65
Printing ............................................................................................. 65
PCL 5e .............................................................................................. 66
PostScript ......................................................................................... 66
Network settings ................................................................................................ 66
Embedded Web server ...................................................................................................... 66
Features ............................................................................................................ 66
Secure the embedded Web server ................................................................... 67
Macintosh Configure Device (Mac OS X v10.3, v10.4, and later) ..................................... 67
4 Theory of operation
Basic operation ................................................................................................................................... 70
Sequence of operation for the base unit ............................................................................ 70
Scanner and ADF functions and operation ........................................................................................ 72
Scanner functions ............................................................................................................. 72
Scanner operation ............................................................................................................. 73
ADF operation .................................................................................................................... 73
ADF paper path and ADF sensors ..................................................................................... 74
ADF jam detection ............................................................................................................. 75
Internal components (base unit) ......................................................................................................... 76
Engine control system ........................................................................................................................ 78
Laser/scanner system ........................................................................................................................ 80
Pickup/feed/delivery system ............................................................................................................... 81
Image-formation system .................................................................................................................... 83
Fax functions and operation .............................................................................................................. 87
Computer and network security features ........................................................................... 87
PSTN operation ................................................................................................................. 87
Receive faxes when you hear fax tones ............................................................................ 87
Distinctive ring function ...................................................................................................... 88
Fax by using Voice over IP services .................................................................................. 88
The fax subsystem ............................................................................................................. 89
Fax card in the fax subsystem ........................................................................................... 89
Safety isolation .................................................................................................. 89
Safety-protection circuitry .................................................................................. 89
Data path ........................................................................................................... 90
Hook state ......................................................................................................... 90
Downstream device detection ........................................................................... 90
Hook switch control ........................................................................................... 90
Ring detect ........................................................................................................ 91
Line current control ........................................................................................... 91
Billing- (metering-) tone filters ........................................................................... 91
Fax page storage in flash memory .................................................................................... 91
Stored fax pages ............................................................................................... 91
Advantages of flash memory storage ............................................................... 91
ENWW v
