ViewSonic PJ650 Service Manual - Page 8

White balance adjustment, visual inspection - remote control

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PJ650 4-5 White balance adjustment (visual inspection) Preparations 1. Perform these adjustments after the PSIG or NRSH adjustment described in Section 4-4. 2. Reset gamma correction before adjustment. Place the cursor on [GAMMA] in the Adjustment menu, press the [RESET] key and select [DEFAULT]. 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 [ENTER] 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. 6. Select GAMMA, SUB-CONTRAST, and G: in the Adjust menu. If the background is white solid, press the [ENTER] 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. ViewSonic Corporation 7 PJ650

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7
PJ650
4-5
White balance adjustment
(visual inspection)
Preparations
1. Perform these adjustments after the PSIG or
NRSH adjustment described in Section 4-4.
2. Reset gamma correction before adjustment.
Place the cursor on [GAMMA] in the Adjustment
menu, press the [RESET] key and select
[DEFAULT].
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 [ENTER] 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.
6. Select GAMMA, SUB-CONTRAST, and G: in
the Adjust menu. If the background is white
solid, press the [ENTER] 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.
ViewSonic Corporation
PJ650