Thanks for the info. I had a similar problem a few years ago, and did not have a TMCC system available. Sent it to the local repair guy - he was stumped and replaced the board. Pretty sure he gave it an honest effort, based on the amount of time he spent on the phone with me. I wonder if the speed control setting would have solved the issue. Sadly, the repair guy passed away about a year ago, so I can't ask him.
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