Christie D Series Service Manual page 9

4-5 White balance adjustment (visual inspection)
Test patterns for the adjustment
Each color
(255/255)
White (255/255)
SB-CNT bar
SB-CNT R+xx G+xx B+xx
SB-BRT bar
SB-BRT R+xx G+xx B+xx
ATTENTION
Set the WHITE BALANCE in SETUP menu
- GEOMETRY CORRECTION - EDGE
BLENDING - WHITE BALANCE - OFFSET
and GAIN to all "+0" .
Complete the DC OFF adjustment. When only
the LAMP UNIT is replaced, DC OFF adjustment
LWU701i/LW751i/LX801i/LWU601i/LW651i
Service Manual
LWU701i / LW751i / LX801i / LWU601i / LW651i
33-tone grayscale
(W/G)
33-tone grayscale
(W/G)
W+xx
W+xx
8
Adjustment procedure
1. Select GAMMA in the FACTORY MENU and press
the RESET button to display the dialog. Select
RESET to reset gamma correction.
2. Display the SB-CNT bar with the
buttons in FACTORY MENU - GAMMA.
3. Select the cell G, and change the test pattern
to 33-tone grayscale in green with the ENTER
button.
4. Use the and buttons to adjust so that
brightness of 33 steps is best.
5. After completing above, display the SB-BRT bar.
6. Select the cell R or B, and change the test
patterns to 33-tone grayscale with the ENTER
button.
ATTENTION
the best contrast ratio.
7. Use the and buttons to adjust so that low-
brightness white balance is best.
8. Select the other cell and adjust in the same way.
9. Display the SB-CNT bar again.
10. Change the test patterns and adjust so that
middle-brightness white balance is best at the
cells R and B in the same way as low-brightness.
11. Repeat adjusting low/middle-brightness white
balance with R and B color so that brightness
and white balance of 33 steps is best.
and
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LIT MAN SERV D2