Phaser 8400/8500/8550/8560 Color Printer Service Manual 2-7
Theory of Operation
Printhead
The Printhead is the heart of the printer, spanning nearly the length of the
drum. Using its 1236 jet nozzles (309 jets for each primary color), with a
horizontal motion of slightly less than 5 mm (0.2 inches), the Printhead can
print the entire image on the rotating drum. The Printhead provides one size
ink drop, which is used for all print-quality modes.
s8500-012
Jet Stack
Reservoir
Purge Tube
Drum
Printhead
Head Driver Board
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