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