Optoma EP721 Family Service Manual page 34

Inspection item
Criteria
3. Blemish (Dark)
Procedure
Inspection item
Criteria
4. Blemish (Bright)
Procedure
Inspection item
Criteria
1024 x 768@60Hz (EP727/728 Family)
1280 x 800@60Hz (EW1610 Family)
- Test Pattern: Gray 10
- Check if the light leaks
* Light leak on reflective edge, eyecatcher, bond-
wires and exposed metal.
- Light leak check
- Bright blemish (dirty)
- The pattern cannot accept the color level of the
leakage is brighter than the gray 10 pattern
- Ref. Defect Specification table
Note: The defect criteria follows TI specification
- Test equipment: video generator
- Test signal: analog 800 x 600@60Hz(EP721/723
Family) Family) )
1024 x 768@60Hz (EP727/728 Family)
1280 x 800@60Hz (EW1610 Family)
- Test Pattern: Blue 60
- Dark blemish check. (dirty)
- The dark blemish is unacceptable in zone A.
The number of dark blemish is less or equal to 4
pixels in zone B.
- Ref. Defect Specification table Defect Specification table
Note: The defect criteria follows TI specification
- Test equipment: video generator
- Test signal: analog 800 x 600@60Hz(EP721/723
Family)
1024 x 768@60Hz(EP727/728 Family)
1280 x 800@60Hz(EW1610 Family)
- Test Pattern: Gray 30
- Dark blemish check.(dirty)
- The bright blemish is unacceptable when it is more
EP721/727/723/728 Family / EW1610 Family
Family) )
Family)
Family)
Family)
Confidential
Gray 10
Blue 60
Gray 30
4-5