HP P3005 manual Primary charging, Laser beam exposure, Developing

Step 1: Primary charging

DC and AC biases are applied to the primary charging roller, which transfers a uniform negative potential to the photosensitive drum.

Figure 4-9Primary charging

Step 2: Laser beam exposure

The laser beam scans the photosensitive drum to neutralize negative charges on parts of the drum. An electrostatic latent image is formed on the drum where negative charges were neutralized.

Step 3: Developing

The developing cylinder comes in contact with the photosensitive drum to deposit toner onto the electrostatic latent image.

NOTE The charges on the exposed area of the drum are shown as positive in Figure 4-10 Developing on page 53. The charges are actually negative, but they are more positive than the charges on the developing cylinder.

Figure 4-10 Developing

ENWW Basic operation 53