PCL 5e .............................................................................................. 45
PostScript ......................................................................................... 45
Network Settings ............................................................................................... 45
Embedded Web server ...................................................................................................... 45
Features ............................................................................................................ 45
Use HP Web Jetadmin software ........................................................................................ 46
4 Operational theory
Basic operation ................................................................................................................................... 48
Sequence of operation for the base unit ............................................................................ 48
Scanner and ADF functions and operation ........................................................................................ 50
Scanner functions ............................................................................................................. 50
Scanner operation ............................................................................................................. 51
ADF operation .................................................................................................................... 51
ADF paper path and ADF sensors ..................................................................................... 52
ADF jam detection ............................................................................................................. 53
Internal components (base unit) ......................................................................................................... 54
Engine control system ........................................................................................................................ 55
Laser/scanner system ........................................................................................................................ 57
Pickup/feed/delivery system ............................................................................................................... 58
Image-formation system .................................................................................................................... 59
Fax functions and operation (fax models only) ................................................................................... 63
Computer and network security features ........................................................................... 63
PSTN operation ................................................................................................................. 63
Receive faxes when you hear fax tones ............................................................................ 63
Distinctive ring function ...................................................................................................... 64
Fax by using Voice over IP services .................................................................................. 64
The fax subsystem ............................................................................................................. 65
Fax card in the fax subsystem ........................................................................................... 65
Safety isolation .................................................................................................. 65
Safety-protection circuitry .................................................................................. 65
Data path ........................................................................................................... 66
Hook state ......................................................................................................... 66
Downstream device detection ........................................................................... 66
Hook switch control ........................................................................................... 66
Ring detect ........................................................................................................ 67
Line current control ........................................................................................... 67
Billing- (metering-) tone filters ........................................................................... 67
Fax page storage in flash memory .................................................................................... 67
Stored fax pages ............................................................................................... 67
Advantages of flash memory storage ............................................................... 67
5 Removal and replacement
Removal and replacement strategy .................................................................................................... 70
Introduction ........................................................................................................................ 70
Removal and replacement warnings, cautions, notes and tips ......................... 70
Electrostatic discharge ...................................................................................... 71
Required tools ................................................................................................... 71
Before performing service .................................................................................................. 71
After performing service ..................................................................................................... 72
ENWW v
