OKIDATA OKIPAGE 8c, Руководство по обслуживанию

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Service Guide - OKIPAGE 8c
Chapter 2 Operation
2.4.1 Electrophotographic processing mechanism
(1) Electrophotographic processed - Each process of the electrophotographic processing
mechanism is outlined below.
(1) Paper pickup - This process causes the roller to give a DC voltage to the paper,
resulting in a negative charge. With this negative charge, the paper is electrostatically
attracted to the roller.
(2) Charging - This process gives a DC voltage to the charge roller so that the image
drum may have a uniform negative charge on its surface.
(3) Exposure - This process causes the LED head to apply light beams according to
image signals to the negatively-charged surface of the image drum. The negative charge
on the illuminated surface of the image drum is reduced according to magnitudes of the
light beams. Thus, a latent image is formed on the surface of the image drum according
to the resulting surface potentials.
(4) Developing and recovery of excessive toner - This process applies
negatively-charged toner to the surface of the image drum. The toner is electrostatically
attracted to the latent image to form a visible image on the surface of the image drum.
Simultaneously, this process electrostatically transfers excessive toner from the image
drum to the developing roller.
(5) Transferring - This process fits paper to the surface of the image drum and applies
positive charge (opposite to the charge of the toner) to the back side of the paper from
the transfer roller. The toner image is transferred to the paper.
(6) Cleaning - Cleaning blade scrapes off the remaining toner of any image drum, which
has been used to transfer the image drum the drum to the paper.
(7) Fixing - This process fixes the toner image on the paper by pressing the fusing the
image.
(2) Paper pickup