Service manual

H57
3-6
Coretronic Corporation
D. Is Image Flickering?
- Ensure the signal cable works as well.
(Please check the length of cable; the signal will be reduce when the
signal cable is longer than 5m)
- Do the “Factory Reset” of the engineering mode.
(Check the Main board if the image still flicker after the factory reset.)
E. Is There Line Bar Shown on The Screen?
- Check if the line bar appears on OSD menu.
(Check DMD Board if the bar line isdisplayed on OSD menu.)
(Check the Main Board if the bar line isdisplayed on OSD menu.)
F. Is Image Noise?
- Ensure the signal cable works as well.
(Check the cable length of cable; the signal will be reduce when the
signal cable is longer than 5m)
- Do the “Factory Reset” of the engineering mode.
(Check the Main board if the image still display with noise.)