Confidential
4-0
GT750
SMPTE BAR
4-6 ADC Calibration
1. VGA Calibration
Note: After replacing main board or upgrading firmware, the VGA calibration
should be done.
Procedure
- Test equipment: video generator
(1) Test signal: 1280 x 800�60Hz
(2) Test Pattern:White/Black
- Note
(1) Calibration pattern should be in full screen mode.
(2) Please get into service mode, then get into “ADC
Adjustment”, and choose “RGB Calibration”.
Inspection item
- Check if there is lines or noise on the screen.
- Horizontal and vertical position of the video should be
adjustable to the screen frame.
Criteria
- If there is noise on the screen, the product is consid
-
ered as failure product.
- The screen appears normal, it shouldn’t appear
any abnormal condition, such as lines and so on.
- Check if the projection is same as monitor displayed.
2. Video Calibration
Note: After replacing main board or upgrading firmware, the Video calibration
should be done.
Procedure
- Test equipment: video generator.
(1) Test signal: 480i
(2) Test Pattern: SMPTE BAR
- Note
(1) Calibration pattern should be in full screen mode.
(2) Please get into Service Mode select ‘‘ADC
Adjustment”, and choose “Video Calibration”.
Inspection item
- Color saturations
Criteria
- There should not have any lack of SMPTE BAR.Color
levels should be sufficient and normal.
- There is not any abnormal lines on the image.
White/Black
