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CF5001 Ver.1.0 Sep. 2003 WRITE
2-13
II UNIT EXPLANATION
2.2 Operation
2.2.1 Image writing
The RGB image data from the CCD sensor is converted into digital data, individually, in the A/D converter
board (ADB) and then, it is sent to the overall control board (OACB). The OACB converts RGB signals to
YMCK signals with the image processing board (IPB). The converted YMCK signals are divided to the
laser drive board /Y, /M, /C, /K (LDB Y, M, C, K) by the IPB. They are written on the drums for each color
with laser light from the each laser drive board.
2.2.2 Color registration correction control
In a black-and-white copier, a transfer image formed on its drum is transferred onto paper directly; how-
ever, in this machine, a color image is split into 4 colors, yellow (Y), magenta (M), cyan (C), and black (K),
the images for each color are formed on each dedicated drum, they are combined on the transfer belt (1st
transfer), and then the combined image is transferred onto paper (2nd transfer). At the 1st transfer, the
transfer locations for each color must be matched to prevent the color drift. This control is called the color
registration correction control.
[1] Laser light [3] Drum
[2] Polygon mirror
[2]
[1]
[3]
8050ma2065