@GGG posted:Nothing is so easy as the job you imagine someone else doing! Thanks Pat.
I can't "harden" the board and the problem is if this worked for a few years, then something happened to the board. I can test board but chances it will run fine on a test unit which only uses a single HO motor.
I would transplant the board into a MTH PS-3 engine and see how it behaves. If it runs fine the issue is those 2 big motors. If it behaves poorly even in a MTH engine, the board did get damaged. You could solder a test bulb to the DC output of the rectifier. This is primary PV for the Motors. Run it. When it stops see if the bulb goes out. If it does that mean the Rectifier stopped rectifying. But more likely is heat generation around the motor fets. The current draw does not seem excessive, but they put a thermistor in there for a reason, so I assume there is some limitation. Additionally, only one of the motor fets drive the motor, the other is in there for some fully unexplained reason (when I asked years ago). Something about controlling heat in the motor drive circuit.
I am out of diesel boards and used up my G scale PS-32 boards. Which would not be a good fit anyway since they drive bulbs not LEDs and the whole upgrade would need to be modified. G
I distinctly used the words “maybe” and “ when possible” ……pretty sure I didn’t commit you to anything!……😉…..or at least I didn’t mean to commit you!…
Pat
