ViewSonic PJ452 Service Manual - Page 13

Adjustment procedure 2, visual inspection, Adjustment technique

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Adjustment procedure 2 (visual inspection) 1. First adjust [MIN] tone [G:]. 2. Select [No.2] [G:]. If the background is [G] monochrome, press the [ENTER] key on the Remote control transmitter to change to solid white. 3. View measurement point [No.2] and [No.3]. Lower the [G] color intensity only of the color point whose [G] color is more intense than measurement point [No.1]. 4. View measurement point [No.10] and [No.11]. Lower the [G] color intensity only of the color point whose [G] color is more intense than measurement point [No.1], and raise the intensity of the point whose color intensity is lower than measurement point [No.1]. 5. Now adjust the [MIN] tone for colors [R] and [B]. 6. View measurement points [No.2], [No.3], [No.10] and [No.11]. Adjust the [R] and [B] of each measurement point so that they have the same color as measurement point [No.1]. Adjustment technique: First, adjust [B:] of the point whose color is to be adjusted so that it approximates that of [No.1]. If [R:] is low at this time, the image will have cyan cast, in which case [R:] is increased. On the other hand, if [R:] is excessive, the image will have a magenta cast, in which case [R:] is decreased. Overall, a cyan cast makes it easy to see color shading. 7. Next, view measurement points [No.4], [No.5], [No.12], [No.13] and make similar adjustments. 8. Then adjust measurement points [No.6], [No.7], [No.8], [No.9], [No.14], [No.15], [No.16] and [No.17]. This completes the [MIN] tone adjustments. 9. Make similar another three tones as described in steps 1 to 8 above. No. 2 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 4 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 6 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 14 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 10 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 12 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 7 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 15 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 3 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 5 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 8 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 16 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 11 deviation range 14 12 16 64 8 10 2 1 3 11 75 15 13 9 17 No. 13 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 9 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 No. 17 deviation range 14 12 16 64 8 10 2 1 3 11 759 15 13 17 ViewSonic Corporation Confidential - Do Not Copy PJ452 10

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Adjustment procedure 2
(visual inspection)
1. First adjust [MIN] tone [G:].
2. Select [No.2] [G:].
If the background is [G] monochrome, press the
[ENTER] key on the Remote control transmitter
to change to solid white.
3. View measurement point [No.2] and [No.3].
Lower the [G] color intensity only of the color
point whose [G] color is more intense than
measurement point [No.1].
4. View measurement point [No.10] and [No.11].
Lower the [G] color intensity only of the color
point whose [G] color is more intense than
measurement point [No.1], and raise the inten-
sity of the point whose color intensity is lower
than measurement point [No.1].
5. Now adjust the [MIN] tone for colors [R] and [B].
6. View measurement points [No.2], [No.3],
[No.10] and [No.11]. Adjust the [R] and [B] of
each measurement point so that they have the
same color as measurement point [No.1].
Adjustment technique:
First, adjust [B:] of the point whose color is to
be adjusted so that it approximates that of
[No.1]. If [R:] is low at this time, the image will
have cyan cast, in which case [R:] is increased.
On the other hand, if [R:] is excessive, the
image will have a magenta cast, in which case
[R:] is decreased.
Overall, a cyan cast makes it easy to see color
shading.
7. Next, view measurement points [No.4], [No.5],
[No.12], [No.13] and make similar adjustments.
8.
Then adjust measurement points [No.6], [No.7],
[No.8], [No.9], [No.14], [No.15], [No.16] and [No.17].
This completes the [MIN] tone adjustments.
9. Make similar another three tones as described
in steps 1 to 8 above.
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No. 2 deviation range
No. 10 deviation range
No. 3 deviation range
No. 11 deviation range
No. 4 deviation range
No. 12 deviation range
No. 5 deviation range
No. 13 deviation range
No. 6 deviation range
No. 7 deviation range
No. 8 deviation range
No. 9 deviation range
No. 14 deviation range
No. 15 deviation range
No. 16 deviation range
No. 17 deviation range
ViewSonic Corporation
Co
nfidential
- Do Not Copy
P
J452
10