Christie DS Series Service Manual page 100

10-5 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
Perform the followings before making this
adjustment work.
・  S et the WHITE BALANCE in SETUP menu
- GEOMETRY CORRECTION - EDGE
BLENDING - WHITE BALANCE - OFFSET
and GAIN to all "+0" .
・  C omplete the PSIG adjustment. When only the
Light source UNIT is replaced, PSIG adjustment
is not required so that this adjustment work can
be done after Flicker adjustment.
LWU900-DS/LHD878-DS/LWU755-DS
Service Manual
LWU900-DS / LHD878-DS / LWU755-DS
33-tone grayscale
(W/G)
33-tone grayscale
(W/G)
W+xx
W+xx
99
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 ▲ and ▼
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
Do not change the cell G of SB-BRT to keep
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.
020-001586-01 Rev. 1 (02-2021)
LIT MAN SERV DS Series