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 ................................................................................................................7 3
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
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