2.5.1 Procedure Using a Color Analyzer
The use of a Minolta TV Color Analyzer (**), or equivalent, is recommended
for setting the white color point and maximum brightness.
1. Select pattern C, black field:
a. Set RV600, RV631, RV651, and RV671 (cutoff potentiometers) fully
clockwise, as viewed from the video card shield.
b. Set RV632 and RV652 (gain potentiometers) fully clockwise, as
viewed from the top of the video card.
c. Set the Brightness control to center detent (midpoint), and the
Contrast control to midpoint.
d. Adjust G2 so that the screen is just not illuminated. Set the
Brightness control to maximum.
e. Adjust the cutoff potentiometers for a correct white color point.
Using a Minolta Color Analyzer, or equivalent, in accordance with
the manufacturer's instructions, this is:
x=0.267 ± 0.01, y=0.282 ± 0.01.
f. Set the Brightness control to center detent (midpoint). If
necessary, adjust G2 to ensure that the screen is just not
illuminated.
2. Select pattern B, white block.
3. Ensure that the Contrast control is at midpoint.
4. Adjust RV652 (green) and RV632 (red) for correct white color points.
Using a Minolta Color Analyzer, or equivalent, in accordance with the
manufacturer's instructions, this is:
x=0.297 ± 0.01, y=0.320 ± 0.01.
5. Set Contrast to maximum.
6. Set RV600 using the color analyzer, to give 200 nits ± 5nits (cd/m²)
in the white block.
7. Select pattern E, gray scale blocks.
8. Check, at maximum and minimum contrast, that the gradation of the
blocks is even from black through white with no color tinges.
9. Check that there is no color smearing.
If steps 8 and 9 are not satisfactory, repeat this complete procedure.
(**) Trademark of the Minolta Corporation. For a list of
trademarks see page FRONT_1.
IBM PS/2 8511 and 8518 Color Displays HMS
Procedure Using a Color Analyzer
¦ Copyright IBM Corp. 1992.
2.5.1 - 1
