Christie DS Series Service Manual page 105

10-8 Ghost adjustment
Test pattern for the adjustment
30%
30%
0/255
112/255
NOTICE
Be sure to do this adjustment work in a darkroom so that you do not miss a faint ghosting.
Adjustment procedure
1. Make this adjustment after completing the adjustment in the section 4-4.
Set the GHOST R, G, B in OPTION-SERVICE-GHOST Menu to 0.
2. Use DAC-P - GHOST - R: in the FACTORY MENU to optimize the setting.
(a) Highlight the cell R of the GHOST bar, and then press the RESET button to initialize.
(b) Check if a faint ghosting is displayed at 24 or 48 pixels away from the test pattern to the left.
(c) If a faint ghosting is not displayed, press the ▲ (up) button one time to increase the value by 1.
Repeat the works (b) and (c) until a faint ghosting appears.
(d) When you find a faint ghosting, decrease the value by 6.
Ex. The faint ghosting appears at the value X, set the value to X-6 finally.
3. In the same way, use DAC-P - GHOST-G: in the FACTORY MENU to optimize the setting.
As for GHOST-G, change the words "to the left " to "to the right" in the description of 2-(b).
4. In the same way, use DAC-P - GHOST-B: in the FACTORY MENU to optimize the setting.
5. After completing the GHOST adjustment above, display the A-GST bar.
GHOST R+xx G+xx B+xx
. .
.
A-GST >>EXE R1:xxx G1:xxx
6. While the cell A-GST is selected, press the
Then, the automatic adjustment starts.
7. After the END is highlighted, read the numbers indicated in the cells R1, G1 and B1. If they all are in the
range from 200 to 500, this adjustment has been succeeded.
If any of them are out of the range, re-connect the panel flexible cables to the MAIN PCB. And then, go back
to the step 6 to execute the A-GST again.
LWU900-DS/LHD878-DS/LWU755-DS
Service Manual
LWU900-DS / LHD878-DS / LWU755-DS
B1:xxx END
(right) button to execute.
104
020-001586-01 Rev. 1 (02-2021)
LIT MAN SERV DS Series