Toshiba e-STUDIO2500c, Руководство по обслуживанию, Страница: 81 / 402

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May 2006 © TOSHIBA TEC e-STUDIO2500c/3500c/3510c COPY PROCESS
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3. COPY PROCESS
3.1 Expression of Colors and 4-Step Copy Process
A variety of colors can be expressed by mixing the three primary colors: Yellow, magenta and cyan.
Red can be created by mixing yellow and magenta; blue can be created by mixing magenta and cyan;
green is created by mixing cyan and yellow; and mixing all the three primary colors allows you to obtain
black.
This equipment has accomplished to improve reproducibility by adding black toner to the mixture of the
above three colors at proper ratio.
Fig. 3-1
In this equipment, 4 color process units (EPU), which include a drum, a developer unit and a main
charger, for yellow, magenta, cyan and black are placed in parallel. Colors are developed in the order of
Yellow (Y)
→
Magenta (M)
→
Cyan (C)
→
Black (K). An image with the 4 developed colors is trans-
ferred on the transfer belt by layering the colors one by one (1st transfer). Then the image is formed on
a sheet by being transferred from the transfer belt by the 2nd transfer roller (2nd transfer).
Fig. 3-2
Yellow
Red
Black
Green
Magenta
Blue
Cyan
[Three primary colors]
Transfer belt
1st transfer roller
Fuser unit
2nd transfer roller
Main charger
Photoconductive drum
Laser optical unit
EPU (Y)
EPU (M)
EPU (C)
EPU (K)
Developer unit