HP P2050 manual Developing

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.

Laser beam

Unexposed area Exposed area

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 5-10 Developing

on page 91. The charges are actually negative, but they are more positive than the charges on the developing cylinder.

Figure 5-10 Developing

Blade

Developing roller

Exposed area	Unexposed area
Unexposed area	Exposed area

Developing bias

Photosensitive drum

Toner acquires a negative charge through friction from the developing cylinder and the blade. When the negatively charged toner comes in contact with the drum, the toner adheres to the electrostatic latent image. The image on the drum becomes visible because of the toner.

Step 4: Transfer

The transfer charging roller, to which a dc positive bias is applied, imparts a positive charge on the print media. When the print media comes in contact with the photosensitive drum, the toner is transferred to the print media.

ENWW Image-formation system 91