HP laserjet 3390, 3392 all-in-one Manuale Di Servizio
Image-formation system
Laser printing requires the interaction of several different technologies, including electronics, optics, and
electrophotographics, to provide a printed page. Each process functions independently and must be
coordinated with the other all-in-one processes. Image formation consists of the following five
processes:
electrophotographics, to provide a printed page. Each process functions independently and must be
coordinated with the other all-in-one processes. Image formation consists of the following five
processes:
●
Electrostatic latent-image formation
●
Developing
●
Transfer
●
Fusing
●
Drum cleaning
and described in the following sections.
Figure 4-9
Image-formation system
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.
to the photosensitive drum.
Figure 4-10
Primary charging
ENWW
Image-formation system
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