Service manual

H57
3-5
Coretronic Corporation
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.
*Note : The procedure to enter engineering mode is as follows
Press ”Power”, ”Up”, ”Down”, ”Right” button when the Unit under search
status.
3-2.4 Performance Troubleshooting (Video Signal)
A. Have Image?
- Ensure the signal cable and source work as well.
- Check if OSD menu shows on the screen.
(Check Main Board if OSD menu cannot show on the screen)
- Check DMD Board.
B. Have Garbage Pattern?
- Ensure the signal cable and source work as well.
- Check that can OSD menu show on the screen.
(Check Main Board if OSD cannot show on the screen)
- Check DMD Board.
C. Is Color OK?
- Do the “Factory Reset” of the engineering mode.
- Ensure the signal cable work as well.
- Check the color temperature setting of OSD menu.
(Check the main board if the setting of color temperature is under default)
- Check the color setting of OSD menu. Ex: “Saturation”, ”Tint” and “Sharpness”
setting of OSD menu.