ViewSonic PJ452 Service Manual - Page 12

ViewSonic Corporation, nfidential - Do, Not Copy, PJ452

Page 12 highlights

Adjustment procedure 1 (When a color differential meter is used) 1. First adjust [MID-L] tone [G:]. 2. Select adjustment point [No.2][G:]. When the background is not [G] monochrome, press the [ENTER] key on the Remote control transmitter to change to solid [G] monochrome. 3. Measure the illumination at adjustment points No. 2, No.3, No.10 and No.11. The values should be: No.2 = Y2 [lx] No.10 = Y10 [lx] No.3 = Y3 [lx] No.11 = Y11 [lx] 4. No.2 and No.3 adjustment point have the average of Y2 and Y3. Y2 = ( Y2 + Y3 ) / 2 ± 2 [%] Y3 = ( Y2 + Y3 ) / 2 ± 2 [%] 5. No.10 and No.11 adjustment point have the average of Y10 and Y11. Y10 = ( Y10 + Y11 ) / 2 ± 2 [%] Y11 = ( Y10 + Y11 ) / 2 ± 2 [%] 6. Then adjust [MID-L] tone [R] and [B]. When the background is [G] monochrome, press the [ENTER] key on the Remote control transmitter to change to solid white. 7. Measure the color coordinates of adjustment point [No.1] and make a note of them. Assume that they are x = x1, y = y1. Note: When the CL-100 color and color differ- ence meter is used, the [∆](delta) mode is convenient. When adjustment point [No.1] color coordinate has been selected, set the slide switch on the side to [∆](delta) while holding down the [F] button on the front panel. The measurement shown after this displays the deviation from measurement point 1. 8. Measure the color coordinates of measurement point [No.2] and adjust [No.2][R:] and [B:] so that the coordinates are as follows. x = x1 ± 0.005 , y = y1 ± 0.010 9. Similarly, measure adjustment points [No.3] to [No.17] and adjust their color coordinates starting in order from the small number points. This completes adjustments required for [MIN]. Note: Since excessive correction may lead to a correction data overview during internal calculations, use the following values for reference. [No.2] to [No.5] ± 40 or less [No.6] to [No.9] ± 50 or less [No.10] to [No.13] ± 70 or less [No.14] to [No.17] ± 120 or less 10.Then adjust [MIN] tone [G] so that the adjustment data set two times as much as [MID-L] tone [G]. This completes [G] color adjustments. 11.Then adjust [MIN] tone [R] and [B]. Select [No.2] [B:] and press the [ENTER] key on the Remote control transmitter to change to solid white. 12.Measure the color coordinates of adjustment point [No.1] and make a note of them. Assume that they are x = x1, y = y1. 13.Now measure the color coordinates of measurement point [No.2] and adjust [No.2][R:] and [B:] so that the coordinates are as follows. x = x1 ± 0.005 , y = y1 ± 0.010 (Target) x = x1 ± 0.020 , y = y1 ± 0.040 14.Similarly, measure adjustment points [No.3] to [No.17] and adjust their color coordinates starting in order from the small number points. This completes [MIN] tone adjustments. 15.Now make similar adjustments for [MID-H] tone. (Adjust [MID-H] tone [G] so that the adjustment data set half as many as [MID-L] tone [G].) 16.Now make similar adjustments for [MAX] tone. (Adjust [MAX] tone [G] so that the adjustment data set half as many as [MID-L] tone [G].) ViewSonic Corporation Confidential - Do Not Copy PJ452 9

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Adjustment procedure 1
(When a color differential meter is used)
1. First adjust [MID-L] tone [G:].
2. Select adjustment point [No.2][G:].
When the background is not [G] monochrome,
press the [ENTER] key on the Remote control
transmitter to change to solid [G] monochrome.
3. Measure the illumination at adjustment points
No. 2, No.3, No.10 and No.11.
The values should be:
No.2 = Y2 [lx]
No.10 = Y10 [lx]
No.3 = Y3 [lx]
No.11 = Y11 [lx]
4. No.2 and No.3 adjustment point have the aver-
age of Y2 and Y3.
Y2 = ( Y2 + Y3 ) / 2 ± 2 [%]
Y3 = ( Y2 + Y3 ) / 2 ± 2 [%]
5. No.10 and No.11 adjustment point have the
average of Y10 and Y11.
Y10 = ( Y10 + Y11 ) / 2 ± 2 [%]
Y11 = ( Y10 + Y11 ) / 2 ± 2 [%]
6. Then adjust [MID-L] tone [R] and [B].
When the background is [G] monochrome,
press the [ENTER] key on the Remote control
transmitter to change to solid white.
7. Measure the color coordinates of adjustment
point [No.1] and make a note of them.
Assume that they are x = x1, y = y1.
Note:
When the CL-100 color and color differ-
ence meter is used, the [∆](delta) mode
is convenient. When adjustment point
[No.1] color coordinate has been
selected, set the slide switch on the side
to [∆](delta) while holding down the [F]
button on the front panel. The measure-
ment shown after this displays the devia-
tion from measurement point 1.
8. Measure the color coordinates of measurement
point [No.2] and adjust [No.2][R:] and [B:] so
that the coordinates are as follows.
x = x1 ± 0.005 , y = y1 ± 0.010
9. Similarly, measure adjustment points [No.3] to
[No.17] and adjust their color coordinates start-
ing in order from the small number points.
This completes adjustments required for [MIN].
Note:
Since excessive correction may lead to a
correction data overview during internal
calculations, use the following values for
reference.
[No.2] to [No.5] ± 40 or less
[No.6] to [No.9] ± 50 or less
[No.10] to [No.13] ± 70 or less
[No.14] to [No.17] ± 120 or less
10.Then adjust [MIN] tone [G] so that the adjust-
ment data set two times as much as [MID-L]
tone [G].
This completes [G] color adjustments.
11.Then adjust [MIN] tone [R] and [B].
Select [No.2] [B:] and press the [ENTER] key
on the Remote control transmitter to change to
solid white.
12.Measure the color coordinates of adjustment
point [No.1] and make a note of them.
Assume that they are x = x1, y = y1.
13.Now measure the color coordinates of mea-
surement point [No.2] and adjust [No.2][R:] and
[B:] so that the coordinates are as follows.
x = x1 ± 0.005 , y = y1 ± 0.010 (Target)
x = x1 ± 0.020 , y = y1 ± 0.040
14.Similarly, measure adjustment points [No.3] to
[No.17] and adjust their color coordinates start-
ing in order from the small number points.
This completes [MIN] tone adjustments.
15.Now make similar adjustments for [MID-H] tone.
(Adjust [MID-H] tone [G] so that the adjustment
data set half as many as [MID-L] tone [G].)
16.Now make similar adjustments for [MAX] tone.
(Adjust [MAX] tone [G] so that the adjustment
data set half as many as [MID-L] tone [G].)
9
ViewSonic Corporation
Co
nfidential - Do
Not Copy
PJ452