Skip to main content

Hey folks! I have a legacy J class #600 that is giving me a few problems. For starters, it will not respond to the Legacy remote whatsoever. It won't program or run in #99 too. It will connect to the Lionchief app, and run conventionally, however it will speed off with any throttle, then stop, and the cab light will blink 1 time indicating a motor stall. I suspect the encoder board on the motor may be why I have the motor problem, but I am not sure about the engine responding to legacy. Any and all suggestions are helpful!

Original Post

Replies sorted oldest to newest

Check the connection of the antenna to the handrails and also make sure the handrails aren't grounded to the shell.  For the runaway and error, I'd be looking for a loose flywheel or perhaps a broken wire from the encoder to the RCMC board.

I’ll look into those, thanks! What made me think it was a motor board was because I had a CSA challenger that did the exact same thing and it was a motor board problem. I’ll report my findings soon

@Sams Trains posted:

It does not appear to be, no. I have pulled on it and it does not move. The handrail antennae’s are connected on the front of the engine above the scale coupler, so it makes me think that wire does something else.. but what?

Screenshot_20240522-203426

Some thing looks off here, like the left side has a wire but not the right and it looks like there was something connected there to me at least.  Not saying there was

Attachments

Images (1)
  • Screenshot_20240522-203426

It's pretty likely these two wires were connected, they sure look like the antenna connection.

Note that the location of those two feed-thru's are right where the antenna terminates on the J.

I'll bet money if you check continuity between the two antennas, you will not get a reading.  Also, if you follow those two wires back to the RCMC, they'll both go to the TMCC receiver board connection.

Attachments

Images (2)
  • mceclip0
  • mceclip1

It's pretty likely these two wires were connected, they sure look like the antenna connection.

Note that the location of those two feed-thru's are right where the antenna terminates on the J.



I'll bet money if you check continuity between the two antennas, you will not get a reading.  Also, if you follow those two wires back to the RCMC, they'll both go to the TMCC receiver board connection.

I think John nailed it.  The other issue is if that bare end is touching the shell it's shorting out the signal all together.

@MartyE posted:

I think John nailed it.  The other issue is if that bare end is touching the shell it's shorting out the signal all together.

And on an RCMC, if it did short, it’s usually the death knell for it,……they’re not hardy like an old TMCC radio board, ….I’ve zapped more than a few R2’s & R4’s in my time, and did not kill them,…..RCMC’s and LCP2’s have a weak constitution IMO, …..😁

Pat

OOPS! Stupidity wins again! I had accidentally traced the wire connected to the shell to a different point, when in fact it was the other antenna wire as we all speculated. I did not get it unstuck from the shell (it snapped at the heat shrink) but with the antenna no longer grounded to the shell, EVERYTHING works perfectly! Legacy connects, and there's no more motor issues. Thanks @gunrunnerjohn and everyone else for your help! Now to see if I can unstick the piece of metal stuck to the shell

Check the connection of the antenna to the handrails and also make sure the handrails aren't grounded to the shell.  For the runaway and error, I'd be looking for a loose flywheel or perhaps a broken wire from the encoder to the RCMC board.

Funny thing, one of my early posts to the thread.

Last edited by gunrunnerjohn
@harmonyards posted:

And on an RCMC, if it did short, it’s usually the death knell for it,……they’re not hardy like an old TMCC radio board, ….I’ve zapped more than a few R2’s & R4’s in my time, and did not kill them,…..RCMC’s and LCP2’s have a weak constitution IMO, …..😁

Pat

The Antenna input to the RCMC is capacitor coupled, so shorting the antenna wire to the shell won't damage the RCMC receiver.

Check the insulation from the handrails to the shell, most likely at least one handrail is shorted to the shell.  When you put the shell back on, it's nicely screwed to the frame and grounds the antenna.

I think I found the one, although it is still being finicky. That, and now when I try to move it the engine takes off again, then stalls and the cab light flashes

@Sams Trains posted:

I think I found the one, although it is still being finicky. That, and now when I try to move it the engine takes off again, then stalls and the cab light flashes

That's usually problem with the encoder rotation being sensed.  Obviously, that can be the encoder, the flywheel position, the toothed wheel coming loose from the flywheel, the wiring, or the RCMC.

Add Reply

Post
This forum is sponsored by Lionel, LLC

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

×
×
×
×
Link copied to your clipboard.
×
×