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Computer Hardware - Engineering

Q1:

In laser printer technology, what happens during the conditioning stage?

A The corona wire places a uniform positive charge on the paper

B A uniform negative charge is placed on the photosensitive drum

C A uniform negative charge is placed on the toner

D All of the above

E None of the above

ANS:B - A uniform negative charge is placed on the photosensitive drum

Laser printing is an electrostatic digital printing process. It produces high-quality text and graphics (and moderate-quality photographs) by repeatedly passing a laser beam back and forth over a negatively charged cylinder called a "drum" to define a differentially charged image. The drum then selectively collects electrically charged powdered ink (toner), and transfers the image to paper, which is then heated in order to permanently fuse the text, imagery, or both, to the paper.