Card stock and heavy media ..............................................................................................19 Card-stock construction......................................................................................19 Card-stock guidelines..........................................................................................19 Loading media......................................................................................................................................20 Main input tray.....................................................................................................................20 Priority feed slot...................................................................................................................20 Specific types of media .......................................................................................................20 Setting media types..............................................................................................................................21 Set the media type...............................................................................................................21 3 Maintenance Life expectancies of parts that wear ....................................................................................................24 Cleaning the product............................................................................................................................26 Cleaning the print path.........................................................................................................26 Cleaning the print-cartridge area.........................................................................................27 Cleaning the pickup roller ...................................................................................................29 User-replaceable parts ........................................................................................................................30 Replacing the pickup roller..................................................................................................30 Replacing the separation pad .............................................................................................33 Replacing the main input tray (paper-pickup tray assembly)...............................................35 Replacing the output-bin extension (delivery-tray assembly) .............................................36 Jams.....................................................................................................................................................37 Clearing jams.......................................................................................................................37 Typical media jam locations................................................................................37 Removing a jammed page..................................................................................38 4 Operational overview Basic functions.....................................................................................................................................42 Formatter system.................................................................................................................................43 Central processing unit .......................................................................................................43 RAM.....................................................................................................................................43 USB interface.......................................................................................................................43 Control panel.......................................................................................................................43 Draft mode (EconoMode)....................................................................................................43 HP Memory Enhancement technology (MEt)......................................................................44 Enhanced I/O ......................................................................................................................44 Printer operation...................................................................................................................................45 Engine control system (engine control unit and power assembly).......................................46 Printer-engine-control system.............................................................................46 Printer laser/scanner unit ...................................................................................47 Power system on the engine-power assembly....................................................48 Image-formation system......................................................................................................49 The seven image-formation processes ..............................................................50 Print cartridge......................................................................................................51 Printer-paper feed system...................................................................................................51 Jam detection .....................................................................................................................53 Conditions of jam detection.................................................................................53 Solenoid, sensors, switches, and motor..............................................................................54 Basic sequence of operation (formatter-to-printer)..............................................................55 iv ENWW