Sony UP-21MD Service Manual page 51

4-1-6. Color Adjustment Block
On the video side, the color-of image data is adjusted using an SRAM conversion table in IC701
(CXD8869Q). On the print side, it is adjusted using a conversion table in IC901 (CKD8869Q). The table
data is provided in the program ROM of CPU. On the video side, the table data is rewritten during V
blanking period. On the print side, it is rewritten immediately before printing.
On the print side, the color rotation and RGB-YMC conversion of print data are also performed as well as
color adjustment. The flow of data shown below is obtained according to the print color. CPU controls
the print setting of each color by receiving the color information command.
Y(MAIN)
Y PRINTING C(SUB1)
M(MAIN)
M PRINTING Y(SUB1)
C(SUB2)
C(MAIN)
GCPRINTING M(SUB1)
Y(SUB2)
UP-21MD V1
4-13