Optoma H27 Service Manual page 22

3-2.9 Poor Uniformity/Shadow
- Ensure the projection screen without dirty
- Ensure the projection lens is clean
- Ensure the Brightness is within spec.
a. Replace the Lamp if the Brightness is less than spec.
- Check Engine Module
3-2.10 Dead Pixel/Dust (Out of spec.)
- Ensure the projection screen without dirty
- Ensure the projection lens is clean
- Clean DMD Chip and Engine Module
- Check DMD Chip
- Check Engine Module
3-2.11 Screen Size Abnormal
- Do "Factory Reset" of the engineering mode.
- Adjust "Aspect Ratio"
- Check Main Board
3-2.12 Garbage Image
- Ensure that the signal cables and source are work as well.
- Check Main Board
- Check DMD Board
3-2.13 Remote Mouse Abnormal
- Check PC/Laptop (Hardware setting)
- Check battery
- Check Remote Controller
- Check IR Receiver Board
- Check Main Board
3-2.14 OSD Problem
- Remote Controller and Control Panel Both Failed
a. Check Main Board
- Remote Controller Failed
a. Check battery
b. Check Remote Controller
3-3
H27