Hitachi CP-X980W Service Manual page 9

11.Before adjusting Gamma, 0%, and [G:], adjust
Gamma, 0%, R: and B: so that the following
values.
[0%][R:] = -128
[0%][B:] = -128
12.Adjust Gamma, 0%, and G: in the Adjust menu so
that illuminance (Y) at the center of the screen is
adjusted as follows.
Y = A x 0.0055 2 [%]
But adjustment value is set to [-68] ~ [0].
13.Now, adjust the R and B colors.
14.Place the cursor on [BLACK-REF] in the Adjustment
menu [GAMMA]. Then measure the color
coordinates at the center of the screen and take a
note of the setting (here assumed to be x1, y1).
15.Adjust Gamma, 86%, R: and B: so that the color
coordinates (x, y) at the center of the screen take
on the following values.
x = 0.282 0.001
y = 0.340 0.002
16.Adjust Gamma, 93%, R: and B: so that the
following values.
[93%][R:] = [86%][R:]
[93%][B:] = [86%][B:]
Adjustment operations (reference)
93% operation
Adjustment
point
0 14 29 43 75 86 93
Input signal (%)
29% operation
Adjustment
point
0 14
86% operation
Adjustment
point
100 0 14 29 43 75 86 93
Input signal (%)
14% operation
Adjustment
point
29 43 75 86 93 100 0 14 29
Input signal (%)
17.Adjust Gamma, 75%, R: and B: so that the color
coordinates (x, y) at the center of the screen take
on the following values.
x = 0.282 0.001
y = 0.340 0.002
18.Adjust Gamma, 43%, R: and B: so that the color
coordinates (x, y) at the center of the screen take
on the following values.
x = 0.280 0.001
y = 0.340 0.002
19.Adjust Gamma, 29%, R: and B: so that the color
coordinates (x, y) at the center of the screen take
on the following values.
x = 0.275 0.001
y = 0.333 0.002
20.Adjust Gamma, 14%, R: and B: so that the color
coordinates (x, y) at the center of the screen take
on the following values.
x = 0.260 0.001
y = 0.315 0.002
21.Adjust Gamma, 0%, R: and B: so that the color
coordinates (x, y) at the center of the screen take
on the following values.
x = x1 + 0.005 0.001
y = y1 + 0.005 0.002
75% operation
Adjustment
point
100 0 14 29 43 75 86 93
Input signal (%)
0% operation
Adjustment
point
43 75 86 93 100 0 14 29
Input signal (%) Input signal (%)
CP-X980W
CP-X985W
43% operation
Adjustment
point
100 0 14 29 43 75 86 93 100
Input signal (%)
43 75 86 93 100
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