On Fri, 22 Jan 2016 16:18:21 -0500, Ralph Mowery wrote:

"Cursitor Doom" wrote in message
...
what you say. I'm still curious as to why that power resistor is
getting so hot. Even if the tranny is fine something's still amiss
somewhere.

Power resistors often get hot. Can you measure the voltage drop across
it and knowing the resistance calculate the wattage it is using.

Sorry for the delay. I'm having to do odd bits towards this project in
between other chores.

OK, it IS a 20 ohm resistor and the voltage across it giving rise to this
heating effect is 3.6V and given that this looks like about a 4W
resistor, makes no sense at all to me. It shouldn't even be getting warm.

The resistor in question is R1814 just to the right of the chopper
transistor on the schematic:

https://www.flickr.com/photos/128859...in/dateposted-
public/

That's all I know right now and I have to dash off again for a couple of
hours....

cheers.