ViewSonic PJ501 Service Manual page 10

PJ551 ONLY
4-4 NRSH adjustment (vertical stripe adjustment)
Signals for internal adjustment
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4-5 White balance adjustment (visual inspection)
Preparations
1. Perform these adjustments after the PSIG
adjustment described in Section 4-4.
Adjustment procedure
1. First, adjust the G color.
2. Select GAMMA, SUB-CONTRAST, and G: in the
Adjust menu. If the background is white solid,
press the [MENU SELECT] key on the Remote
control transmitter to change to [G] monochrome in
the 28-tone grayscale.
3. Adjust GAMMA, SUB-CONTRAST, and G: in the
Adjust menu so that brightness of 28 steps is best.
4. Don't adjust GAMMA, SUB-BRIGHT, and G: in the
Adjust menu. Because we want to keep the best
contrast ratio.
5. Then adjust colors R and B.
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Adjustment procedure
1. Make this adjustment after completing the
adjustment in 4-3 Flicker adjustment.
2. Use DAC-P - NRSH - R: in the Adjustment menu to
adjust so that the vertical lines spaced every 6 dots
are as inconspicuous as possible.
(Reduce the adjustment value when black stripes
appear in the 2nd or 3rd tone from the black side.
Note that when the adjustment value is lowered,
white stripes may appear in the 2nd or 3rd tone
from the bright side. Should this happen, adjust so
that the stripes are as inconspicuous as possible.)
3. In the same way, use DAC-P - NRSH - G: in the
Adjustment menu to adjust vertical stripes of G color.
4. In the same way, use DAC-P - NRSH - B: in the
Adjustment menu to adjust vertical stripes of B color.
2. Reset gamma correction before adjustment.
Place the cursor on [GAMMA] in the Adjustment
menu, press the [RESET] key and select
[DEFAULT].
6. Select GAMMA, SUB-CONTRAST, and G: in the
Adjust menu. If the background is white solid,
press the [MENU SELECT] key on the Remote
control trasmitter to change to [W] monochrome in
the 28-tone grayscale.
7. Adjust GAMMA, SUB-BRIGHT, R: and B: in the
Adjust menu so that low-brigtness white balance is
best.
8. Adjust GAMMA, SUB-CONTRAST, R: and B: in the
Adjust menu so that middle-brightness white
balance is best.
9. Repeat steps 7 to 8 above, and adjust so that
brightness white balance of 28 steps is best.
7
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PJ501/PJ551