Optoma EP732B Service Manual page 20

G. Have Line Bar?
- Adjust the frequency selection in OSD Menu.
- Press the Menu button to check that have Line bar show on the OSD Menu.
(Check the DMD chip and DMD board. If the Line bar also show on the OSD Menu)
- Ensure that there is no dust on the DMD Contact housing module.
- Re-assembly for DMD module.
- Check the Main board.
H. Have Noise?
- Ensure the Signal cable and Source is work as well.
- Adjust the Tracking selection in OSD Menu.
- Press the Menu button to check that have the noise issue appear on OSD Menu.
(Check the Main board if the noise also appear on the OSD Menu.)
* Note : The procedure to enter service mode is..
Press "UP", "DOWN" button at the same time, and then press "UP", "UP"
"LEFT" button when the unit display "No Signal" image.
3-2.3 Performance Troubleshooting (Video 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 if OSD menu cannot show on the screen)
- Check the I/O connect board.
(Use the new I/O connect board for the test)
B. Have Garbage Pattern?
- Ensure the signal cable and source work as well.
- Check that can OSD menu show on the screen.
(Check the main board if OSD cannot show on the screen)
- Check the I/O connect board.
(Use the new I/O connect board for the test)
3-3 EP732B