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 5-13 Laser-beam exposure
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 5-14 Development
Step 5: Primary transfer
The positively charged primary-transfer rollers contact the ITB, giving the ITB a positive charge. The
ITB attracts the negatively charged toner from the surface of each photosensitive drum, and the
124 Chapter 5 Theory of operation ENWW
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