Defender replacement monitor

[sfrascella]

Just wondering if a Vision Pro 19" standard resolution monitor would work as a replacement for a dead WG 4600? If so would I need to do anything special to hook it up to the PCB? Thanks

[Ken Layton]

Mechanically and physically the monitor is dead on. The power connector and video connector are different.

[sfrascella]

Any recommendations for a compatible replacement? I would like to go with a new montor, but if this is impossible I guess I will start watching E-bay.

[tta583]

Not impossible, just a little wiring difference.  Most "old school" monitors (well all that I have seen but I will defer to those with more experience) use a 2 position Molex power connector.  1 pin for hot (black) and 1 for neutral (white).  The Earth ground (green) is screwed or clipped to the monitor frame.

The Vision Pro (if it’s like the one I have) has a 3 position Molex:

http://www.therealbobroberts.net/3pos.jpg

All 3 wires run through the plug.

Now, to be correct, clean, and set up for easy maintenance down the road you could remove the 3 position and crimp on a 2.  You still should connect the frame to Earth.  Do that one of a couple of ways.  Use the original clip or wire from the cab and affix it to the new monitor’s frame.  You could also tie the now free hanging Earth ground from the old 3 position Molex to the cab’s factory ground.


You could also get real fancy and make an adapter that accepts the 2 position from the cabs wiring harness and connects into the correct pins on a 3 position on the monitor.  The 3 position side should then have a wire on the Earth ground pin that you could then loop into the ground strap in the cab. 

Notice I have not mentioned gender on the plugs.  To be honest I don't recall which side is which gender.  I would have to look at one.

And, finally, you can do it the fast and cheesy way which is to simply cut off the ends at both the cab and monitor and direct wire it with some wire nuts.

[Ken Layton]

Of course the way I do things is I make the new monitor conform to the existing cabinet and wiring standards. That way the monitor is compatible with existing test equipment and test bench isolation power supply.