Lexmark MB2236 Service Manual page 297

The charge roller applies a uniform negative electrical charge to the surface of the photoconductor drum. The
photoconductive properties of the surface material allow it to hold the charge as long as it is not exposed to
light.
Expose
The printhead emits the light that contacts the surface of the photoconductor drum. The light turns on or off
coinciding with the digital latent image. The light causes areas of the photoconductor drum surface to lose
charge, resulting in a relative opposite polarity.
1 Charge roller
2 Photoconductor drum
1 Printhead
2 Photoconductor drum
Theory of operation
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