Optoma EP780 Service Manual page 38

No Step
6 Screen
Uniformity
7 Light Leak
8 Calibra-
tion
Confidential
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Specification
Should be - If not, please return the
compliant with unit to repair area.
60%.(Minimum) *Please check and see if
- The total number and
distance of dead pixels
should be compliant with
the spec.
The unit can't - Test Signal :
accept the leak- 1024x768@60Hz
age is brighter - Test Pattern : Gray 10
then Gary 10 Pattern
pattern - Please check and see if
the light leaks
- The unit cannot accept
the leakage is brighter
than Gray 10 Pattern
Note:
Light leak on reflective
edge, eyecatcher, bond
wires and exposed metal.
Calibration Pat- - Once Main Board is
tern should be in changed, Video Calibration
full screen mode & PC Calibration should be
done as well.
- Video Calibration
- Test Signal : 480P@60Hz
- Test Pattern : SMPTE bar
- ADC Calibration
(PC Calibration)
- Test
Signal:1024x768@60Hz
- Test Pattern : White (Top)
Note:
1. Calibration Pattern
Procedure
there are dead pixels on
DMD Chip.
*Note
Black (Bottom)
should be in Full
Screen Mode.
4-4
Photo
EP780