Installing optional Tray 3 ......................................................................................................25 Loading Tray 1 .....................................................................................................................25 Installing supplies .................................................................................................................27 Print cartridges ....................................................................................................27 3 Managing and maintenance Managing supplies ................................................................................................................................32 Life expectancies of supplies ...............................................................................................32 Checking and ordering supplies ..........................................................................................32 To check status using the control panel .............................................................32 To check and order supplies using HP Toolbox .................................................32 Storing supplies ...................................................................................................................33 Replacing and recycling supplies ........................................................................................33 Replacing the print cartridges .............................................................................33 HP policy on non-HP supplies .............................................................................................33 HP anti-counterfeit website ..................................................................................................33 Cleaning the printer ..............................................................................................................................34 To clean the printer at the printer .........................................................................................34 To clean the fuser using HP Toolbox ..................................................................................35 Cleaning spilled toner ..........................................................................................................35 Calibrating the printer ...........................................................................................................................36 To calibrate the printer at the printer ...................................................................................36 To calibrate the printer from the HP Toolbox .......................................................................36 4 Operational theory Engine control system ..........................................................................................................................38 Basic sequence of operation ...............................................................................................38 Power-on sequence .............................................................................................................39 Motors and fans ...................................................................................................................39 Main motor failure detection ................................................................................40 Fan motor failure detection .................................................................................40 Image formation system .......................................................................................................................41 Image formation process .....................................................................................................43 Latent image formation .......................................................................................44 Laser/scanner system .........................................................................................45 Developing stage .................................................................................................................45 Print cartridge ......................................................................................................46 Transfer belt (ETB) ..............................................................................................47 Transfer stage ......................................................................................................................48 Separation stage ..................................................................................................................49 Fusing stage ........................................................................................................................49 Pickup and feed system .......................................................................................................................51 Manual feed slot pickup mechanism ...................................................................................53 Paper feed mechanism ........................................................................................................53 Skew correction by the registration shutter .........................................................................53 Jam detection .......................................................................................................................54 Solenoid, motor, and fan locations ......................................................................................55 Printed circuit assembly locations ........................................................................................55 250-sheet tray solenoid and printed circuit locations ..........................................................56 Service-only tools (SERVICE ONLY) ...................................................................................................58 iv ENWW