Service manual

Original Color
Toner
Bk R Y G C B M W
Y 11110000
M 11000110
C 10011100
Bk 10000000
Color Conversion Table
a.
Color conversion mode
Color conversion mode is a user feature, not to be confused with color
conversion (RGB to YMCK) as described on the previous page. In color
conversion mode, a selected color (C/M/Y/R/G/B/K/W) on an original that
falls within the recognition thresholds for that color is converted into a
different color on the copy. Up to 4 colors can be converted at one time.
Colors that can be converted to are C/M/Y/R/G/B/K/W, and 1 user color
(edit machine only). Color conversion is done by changing the
parameters of the matrix.
For example, when changing Yellow to Black, the coefficients for the
Yellow video signal become as follows:
Y: 1, M: 1, C: 1, Bk: 1
b.
Pastel mode
In pastel mode, the parameters of the matrix are changed, and the
output of the combined YMCK data is shifted to a value between 100 %
and 25 %. There are 9 steps, and the value used depends on the user’s
selection.
c.
Color balance mode
In color balance mode, the data output for each color (YMCK) are
adjustable independently in 9 steps by changing the parameters of the
matrix.
d.
Original mode
This machine has three types of original mode for photo mode (Printed
Photo, Glossy Photo, and Copied Photo). The most suitable matrix for
the original type is applied using the "0" key. (See the operation manual.)
e.
RGB toner correction mode
The toner mixing ratios for single colors (R/G/B) are adjustable (SP
5-611-1 to 5-611-6). The adjustments are valid for single color copy
mode only.
IMAGE PROCESSING
A166/A187/A189 2-52 SM
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA