Dear All,
We are trying to repair one of these controllers. Even though Edwards has discontinued this model, they will provide us with no schematics or troubleshooting information. I'm hoping that someone may have some (any!) useful information.
On the main board, there is burn damage at C23, adjacent to a 4N25 optoisolator. I suspect that whatever failure caused this is probably a fairly characteristic one, but without schematics it's very difficult to make any progress in determining the cause of the problem. If no one has any schematics, does anyone have any experience with these particular symptoms?
Thanks
Mark Sulkes
Tulane University
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