BenQ SX930, Service Manual

Page: 83 / 175

83
4.6.3 PC Alignment Procedure
Condition: When 32 gray level image is abnormal or not smooth.
Equipment
：
- Pattern generator or PC with standard output
(Notice: If uses PC, the signal level is calibrated to this PC)
- Source = Compuetr-1 : use standard D-sub cable
OSD Default value
：
Item Value
Cal R Offset 512
Cal G Offset 512
Cal B Offset 512
Cal R Gain 1024
Cal G Gain 1024
Cal B Gain 1024
Procedure
：
1. Connect power cord and PC D-sub source into projector to Component-1.
2. Turn on projector.
3. Change Timing of pattern generator:
Timing: 1024x768 @60Hz
4. Change Pattern of pattern generator:
Pattern: Full frame pattern, ex.pattern1
5. Press “Auto” to catch the full screen
6. Change Pattern of pattern generator:
Pattern: A near white color (240,240,240)
and a near black color (16,16,16).
The center white color is
(255,255,255)
7. Enter Factory mode, block 3
8. Press “Calibration RGB <Press L or R>” to let
the black level to just distinguish, and the light
output of white level to just max.
9. Check the 32 levels of gray pattern. All steps must
appear.
10. Done
Pattern: A near white color (240,240,240) and a near black
color (16,16,16). The center white color is (255,255,255).
Pattern: 32 gray level