Christie DS Series Service Manual page 102

Adjustment procedure 1
(When a color differential meter is used)
1. First adjust the -MID-1- tone, from G color.
2. Select G of point No.2 and change the
background to solid G monochrome.
3. Measure the illumination at points No. 2, 3, 10
and 11.
The values should be:
No.2 = Y2 [lx], No.10 = Y10 [lx]
No.3 = Y3 [lx], No.11 = Y11 [lx]
4. Points No.2 and No.3 have the average of Y2
and Y3.
Y2 = ( Y2 + Y3 ) / 2 ± 3 [%]
Y3 = ( Y2 + Y3 ) / 2 ± 3 [%]
5. Points No.10 and No.11 have the average of Y10
and Y11.
Y10 = ( Y10 + Y11 ) / 2 ± 3 [%]
Y11 = ( Y10 + Y11 ) / 2 ± 3 [%]
6. Then adjust R and B color of the -MID-1- tone.
Change the background to solid W monochrome.
7. Measure the color coordinates of point No.1 and
make a note of them.
Assume that they are x = x1, y = y1.
NOTE: When the CL-100 or CL-200 color and
color difference meter is used, the Δ(delta) mode
is convenient. When point No.1 color coordinate
has been selected, set the slide switch on the
side to Δ while holding down the F button on the
front panel. The measurement shown after this
displays the deviation from point No.1.
8. Measure the color coordinates at point No.2 and
adjust R and B color of point No.2 so that the
coordinates are as follows.
x = x1 ± 0.005 , y = y1 ± 0.005 (as target)
x = x1 ± 0.010 , y = y1 ± 0.015
9. Measure and adjust their color coordinates of
points No.3 to 17 in the same way starting in
order from the small number points.
This completes adjustments required for -MID-1-
tone.
NOTE: Since excessive correction may lead
to a correction data overview during internal
calculations, use the following values for
reference.
No.2 to 5: ± 40 or less
No.6 to 9: ± 50 or less
No.10 to 13: ± 70 or less
No.14 to 17: ± 120 or less
LWU900-DS/LHD878-DS/LWU755-DS
Service Manual
LWU900-DS / LHD878-DS / LWU755-DS
10. Next, adjust the other tones in order of -MIN-,
11. Adjust each tone as follows, from G color.
12. Select R or B of point No.2 at -MIN- tone and
13. Measure the color coordinates at point No.1 and
14. Now measure the color coordinates at point
15. Similarly, measure and adjust their color
16. Now make similar adjustments for R and B
17. Finally, set the values of the -MID-2-, -MID-4-
101
-MID-3-, -MID-2-, -MID-5-, -MID-4-, -MAX- and
-MID-6-.
-MIN- tone : one and a half of -MID-1- tone
-MID-3- tone : 0 (no adjustment)
-MID-2- tone : a half of -MID-1- tone
-MID-5- tone : 0 (no adjustment)
-MID-4- tone : average of -MID-3- and -MID-5-
tones
-MAX- tone : 0 (no adjustment)
-MID-6- tone : average of -MID-5- and -MAX-
tones
change the background to solid W monochrome.
make a note of them. Assume that they are x =
x1, y = y1.
No.2 and adjust R and B color of point No.2 so
that the coordinates are as follows.
x = x1 ± 0.010 , y = y1 ± 0.020 (Target)
x = x1 ± 0.040 , y = y1 ± 0.080
coordinates of points No.3 to 17 starting in order
from the small number points.
color of -MID-3-, -MID-5- and -MAX- tones.
Adjust them in the same way as the -MIN- tone
adjustments in the step 12 to 15 so that the
coordinates are as follows.
x = x1 ± 0.005 , y = y1 ± 0.005
and -MID-6- tones as follows using the values
already set.
-MID-2- tone : average of -MID-1- and -MID-3-
tones
-MID-4- tone : average of -MID-3- and -MID-5-
tones
-MID-6- tone : average of -MID-5- and -MAX-
tones
(continued on next page)
020-001586-01 Rev. 1 (02-2021)
LIT MAN SERV DS Series