Step 2: Expose
During the expose step, the laser fires a focused beam of light at the surface of each photoconductor (B) and
writes an invisible image called a latent image or electrostatic image for each color.
The laser beam actually discharges the surface only where the beam hits the photoconductor. This creates a
difference in charge potential between the exposed area and the rest of the photoconductor surface.
Service tips
•
The laser beam passes through a glass lens as it exits the laser unit. If this lens gets contaminated
with toner or other debris, it will cause vertical streaking of white/lightness on the page. Cleaning the
lens will solve the problem.
•
Never touch the surface of the photoconductor with your bare hand. The oil from your skin may cause
a charge differential on the surface, and toner will not stick properly. The result would be repeating
blotches of voids/light print on a page. Then the photoconductor will have to be replaced.
The surface of the photoconductor is coated with an organic substance that makes it sensitive to
•
light. Be sure and cover the photoconductor when you are working on the printer so you don't "burn"
it. If exposed to light for too long, it will cause light/dark print quality problems and have to be
replaced.
7525-63x
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