HP 2830, 2840, 2820 manual Maintenance, Theory of operation

Print Settings tab	57
Fax Settings tab	57
Copy Settings tab	57
Network Settings tab	57
HP Toolbox links	58
Other links	58
Embedded Web server	59
Features	59
3 Maintenance
Chapter contents	61
Life expectancies of components	62
Cleaning the device	64
Cleaning the device exterior and scanner	64
Cleaning the paper path	65
Managing supplies	68
Supplies life	68
Checking and ordering supplies	68
To check status and order supplies using the control panel	68
To check status and order supplies using the HP Toolbox	69
Storing supplies	69
Replacing and recycling supplies	69
HP policy for non-HP supplies	69
Resetting the device for non-HP supplies	69
HP fraud hotline	70
4 Theory of operation
Chapter contents	71
Introduction	72
Engine control system	76
Basic sequence of operation	76
Power-on sequence	78
Motors and fans	79
Laser/scanner system	80
Pickup and feed system	81
Optional tray 2	83
Jam detection	84
Photosensors and switches	85
Solenoids and clutches	87
Printed circuit assemblies	89
Image-formation system	91
Image-formation process	93
Latent-image-formation stage	94
Step 1: primary charging	94
Step 2: laser-beam exposure	94
Developing stage	95
Step 3: auxiliary developing	95
Step 4: developing	95
Transfer stage	96
Step 5: primary transfer	96

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