Optoma EP780 Service Manual page 48

Chapter 6
EDID Key-in Procedure
Extended Display Identification Data is a VESA standard data format that contains basic
information about a display device and its capabilities, including vendor information, maximum
image size, color characteristics, factory pre-set timings, frequency range limits, and character
strings for the EP780 and serial number.
The information is stored in the display and is used to communicate with the system through
a Display Data Channel (DDC ), which sites between the display device and the PC graphics
adapter. The system uses this information for configuration purposes, so the EP780 and
system can work together.
Note: If a display device has digital input ports, like DVI or HDMI, but without EDID in its main
board, the display device will show no image while the input source is digital signal.
6-1 Equipment Needed
Software
-
EDID.exe
- EP780X_EDID_Y.ini
Hardware
- EP780
- PC
- RS 232 9 pin cable (Male to Female, pin to pin)
- Power Cord for EP780
- VGA Cable
- DVI Cable
- EDID Fixture (JP3 must be closed)
- Power Adapter for Fixture and Power Cord
Confidential
6-
EP780