Optoma EP739 Service Manual page 24

3-2.2 Performance Troubleshooting (Computer Signal)
A. Have Image?
- Ensure the Signal cable and Source work as well.
- Check that can OSD Menu show on the screen.
- Check the Main board.
- Check the DMD board.
B. Have Garbage Pattern?
- Ensure the Signal cable and Source work as well.
- Check the Main board.
- Check the DMD board.
C. Uniformity OK?
- Ensure the Projection screen without dirty.
- Ensure the Projection lens is clean.
- Ensure the Brightness is within spec.
(Replace the Lamp if the Brightnedd is less than spec.)
- Check the Optical engine.
D. Is Color OK?
- Ensure the Signal cable works as well.
- Check the "Color wheel index" in the service mode of OSD Menu.
(*Note)
- Check the Photo sensor.
- Check the Main board.
- Check the DMD board.
E. Dot Defect isn't Compliant with the Spec.
- Ensure the Projection lens is clean.
- Use the Air gun for the Optical engine clean.
- Check the DMD chip.
3-3
EP739/EP739H/EP738
Series