Mitsubishi EUM-1491A CRT display series LCD perfect substitute
MDA, CGA, EGA standard pin definitions (monochrome or multicolor):
1, GND (in)
2, GND (in)
3, NC (null)
4, NC (null)
5, NC (null)
6, the INTENSITY (brightness), TTL level
7, the VIDEO (video) TTL level
8, the H-SYNC (synchronous) TTL level
9, the V-SYNC (synchronous) TTL level
MDA display standard:
MDA standard is the first company to develop a standard IBM PC video display. It only supports the character display function, no graphics, no color, no gray level. So it is limited in use.
MDA showed that the standard character display specifications for 80 X25, the resolution is 720X350. Line frequency is 18. 432KHZ, frequency is 50HZ. Signal interface with 9 pin D interface.
CGA display standard:
CGA is seen as an alternative to MDA, it and MDA compared to an increase of two functions, namely the color display and graphics display. Its highest resolution is 640X200, but this approach can only display a single color. In the color graphics display mode when the resolution is very low, only 320X200. and its frequency is 15.7KHZ, field frequency is 60HZ, it provides two kinds of interface, a D interface is a 9 pin, pin and MDA interface are the same. Another is the output of the NTSC composite video signal, thus the computer monitor with NTSC tv.
EGA display standard:
EGA was a supplement type graphics adapter. The software is compatible with its highest resolution CGA. 640X350, line 21.8KHZ, line frequency 60HZ. can be set to single display mode. It is also a signal interface with D - 9 pin, the arrangement and the same MDA.
Reconstruction and repair technology upgrades EGA CGA MDA displays are widely used in industrial production, CNC machine tools, industrial equipment for display using EGA CGA MDA. Instead of early imported CNC equipment, interface display reconstruction and repair case nine widely used,
Mainly includes: imported CNC machine tools (CNC machine tool FANUC printing machine, injection molding machine, etc.), the import of industrial process automation control system, DCS control system, grinding machine, milling machine, machining center, EDM machine, bending machine, punching machine, injection molding machine control system, welding robot, auto parts production line.