Oscillating Printhead Assembly - Lexmark T652 Service Manual

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When a laser beam is scanned across the photoconductor (drum) surface from one end to the other while
turning on and off the beam, one line of latent image is created. If the scanning by the laser beam is repeated
while rotating the drum, a two-dimensional image is created. The resolution in the scanning direction (from right
to left) is determined by the rotational speed of the printhead motor, depending on how quickly the laser is
adjusted. The resolution in the process direction (from top to bottom) is determined by the rotational speed of
the printhead motor. (The higher the scanning speed becomes, the sooner the scanning of the next row can
be started.)
Paper Path
600 dots/inch
600 scans/inch

Oscillating printhead assembly

The oscillating printhead scans the photo conductor drum surface with a laser beam. It consists of four
components: laser diode (LD) card assembly, magnetic motor, mirror, and the start of scan card assembly.
Appendix C: Theory of operation
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