Input trays ................................................................................................................................37 Printer output paths .................................................................................................................38 Top output bin ...................................................................................................................38 Rear output door ...............................................................................................................38 Loading media .........................................................................................................................39 Loading tray 1 ...................................................................................................................39 Loading optional tray 2 .....................................................................................................40 Loading optional tray 3 .....................................................................................................42 HP LaserJet Toolbox ...............................................................................................................44 Supported operating systems ...........................................................................................44 Supported browsers .........................................................................................................44 Viewing the HP LaserJet Toolbox ...................................................................................45 Status tab ..........................................................................................................................45 Troubleshooting tab ..........................................................................................................45 Alerts tab ...........................................................................................................................46 Documentation tab ...........................................................................................................46 Device Settings window ....................................................................................................47 Other links .........................................................................................................................48 3 Maintenance Chapter contents .....................................................................................................................49 Life expectancies of supplies ..................................................................................................50 User-replaceable parts ............................................................................................................52 Replacing the tray 1 pickup roller and separation pad .....................................................52 Replacing the separation pad in optional tray 2 or in optional tray 3 ...............................57 Cleaning the printer .................................................................................................................61 Cleaning the printer ..........................................................................................................61 Calibrating the printer ..............................................................................................................63 To calibrate the printer at the printer ................................................................................63 To calibrate the printer from the HP LaserJet Toolbox ....................................................63 Managing supplies ..................................................................................................................64 Supplies life ......................................................................................................................64 Checking and ordering supplies .......................................................................................64 Storing supplies ................................................................................................................65 Replacing and recycling supplies .....................................................................................65 HP policy for non-HP supplies ..........................................................................................66 HP fraud hotline ................................................................................................................66 4 Theory of operation Chapter contents .....................................................................................................................67 Introduction ..............................................................................................................................68 Engine control system .............................................................................................................70 Basic sequence of operation ............................................................................................70 Power-on sequence ..........................................................................................................72 Motors and fans ................................................................................................................73 Laser/scanner system .............................................................................................................74 Pickup and feed system ..........................................................................................................75 Paper trays .......................................................................................................................76 Jam detection ...................................................................................................................77 Photosensors and switches ..............................................................................................78 Solenoid and clutches ......................................................................................................80 Printed circuit assemblies .................................................................................................82 Image-formation system ..........................................................................................................84 Image-formation process ..................................................................................................85 Latent-image-formation stage ..........................................................................................85 iv ENWW