Lionmaster Legacy Challenger 6-11200 Help please - only runs forward in command

Mike try a Reset first.  Then try a new Legacy R4LC (modular engine).  If that does not work, inspect harness for good connections and such, but if none of that fixes it.  The Motor driver would be next on the list to replace.  G

Thanks George. Already tried the Radio Board from an identical engine - no change. I will inspect again the wiring and in particular the connections to the motor driver board.

If it is the latter i guess I will have to bite the bullet on a replacement. Are they repairable at component level?

Thanks again

MIKE

I have a hunch it's something in your gearing.  That's an old unit and you run a decent size consist.  Any chance you have worn your gearing or side rods enough that when you try to reverse things are bound.  Consider removing the motors from the trucks and then test it.  If the motors spin then that proves the motors, boards, and connections are good.

Also, if the main motor is bad for reverse only then the slave motor will not move either. 

Have you tested conventionally only?  That can rule out the radio board. 

Mike it might be if a Motor Driver Fet failed.  Inspect for burned trace, broken solder joints on the board, especially at the FETs.  I have  BB driver in stock, but S01 code.  Or you can go to Legacy Back EMF as a cheaper alternative.  Otherwise you have to get the Lionel Board and hope that was it.  Sometimes the wire breaks under the insulation so look hard at the 6 plug.  But if it runs in one direction the motor leads and AC in really are probably ok on that connector.  G

Thanks G - I looked closely at all the wires and the board but cant see burned trace or broken solder joints. Could it be a dry joint?  I think on balance I will order a  new board in any case as i have a number of Lionmaster Legacy Challengers with the same set up.

Thanks for all you input.

Steims - a valid point but already checked and no binding.

MIKE

It won't run in one direction, all the wiring has been checked and the R4LC has been swapped.  Not much else in the loop besides the DCDS.