Function Troubleshooting; Audio Troubleshooting - Optoma EP732B Service Manual

3-2.4

Function Troubleshooting

A. OSD Does Not Show up.
- Check the Keypad cable and ensure there is no broken issue on the cable.
- Use Keypad to test again.
(Replace the Keypad board if the Unit works fine with the new Keypad board.)
- Use the Remote control for the OSD function test.
(Check the Keypad board and Keypad cable if the Remote control works as well)
- Check the Main board.
B. Function Cannot Be Adjust.
- Check the Keypad cable and ensure there is no broken issue on the cable.
- Use Keypad to test again.
(Replace the Keypad board if the Unit works fine with the new Keypad board.)
- Use the Remote control for the OSD function Adjustment test.
(Check the Keypad board and Keypad cable if the Remote control works as well)
- Check the Main board.
3-2.5

Audio Troubleshooting

A. No Sound Output.
- Ensure the Signal cable and Source are work fine.
- Use the new Speaker for the Sound output test.
(Replace the Speaker if the new Speaker works fine with the Unit.)
- Check the Speaker wire that has broken issue or not.
- Check the Main board.
B. Sound Output With Noise.
- Ensure the Signal cable and Source are work fine.
- Ensure the volume has not select to the max selection.
(Due to the output power of internal Speaker is 2W only.
It might has the noise issue if the volume select to the max.)
- Use the new Speaker for the test.
(Replace the Speaker if the new Speaker works fine with the Unit.)
- Check the Speaker wire that has broken issue or not.
- Check the Main board.
3-5 EP732B