HP CP4525DN Laser CC494A#ABA manual Laser-beam exposure, Development

Step 3: Laser-beam exposure

The laser beam strikes the surface of the photosensitive drum in the areas where the image will form. The negative charge neutralizes in those areas, which are then ready to accept toner.

Figure 1-15Laser-beam exposure

Laser beam

Step 4: Development

Toner acquires a negative charge as the developing cylinder contacts the developing blade. Because the negatively charged surface of the photosensitive drums have been neutralized where they have been struck by the laser beam, the toner adheres to those areas on the drums. The latent image becomes visible on the surface of each drum.

Figure 1-16 Development

Developing blade

Developing roller

Developing bias

Photosensitive drum

ENWW Image-formation system 25