Help needed for TMCC issue

So you don't have any tmcc base turned on, unconnected or not, when you are running conventional?

Correct no tmcc  it is unplugged from ac source, test layout is simple loop  nothing to complicate issue

Picture of the layout connection and model number of the engine?

hi` i had the same problem too, try turning the engine over and switching the control button from program to run, that fixed my problem, hope it helps, good luck

In the past, a reset (procedure should be in the manual) might be the answer.  There is a specific code for each locomotive.  Uses the AUX button as I recall.  Simple.

I have experienced this issue on several occasions with customer repairs. A complete failure of conventional control is usually the result of a fried R2LC radio board which controls this specific function. It is doubtful that resetting your engine will correct this issue. Try swapping in a radio board from another loco, if that’s an option, and you’ll know for sure. 

It could very well be a failed R2LC board as noted above, but also check the PRG/RUN switch and the wires leading to it.

That switch with a "closed" circuit could result in the symptoms you describe.

TRW

Check switch, but if you ran it, sounds like switch is ok.

The TMCC reset is also smart to do.

If still no joy, as Gregg stated an R2LC swap.  You can have one mode work, while another does not.  G

Thanks for the ideas and help

I swapped the radio board and got back conventional functions but lost back up lites on tender in command !!

How much does a new radio board cost ?

Is the old oddessy  cruise kind of jerky/not smooth at times?

You may need to reprogram your R2LC board with the reset correct code to get the back-up light to function properly. That code is "4" for your locomotive. The instructions will be found in your loco manual.

Lionel charges $40 for a replacement R2LC. I believe your locomotive takes a 691-R2LC-C08, but there's a small possibility it used the very last C07's. Regardless, look at the sticker on your existing board, and order the same thing -- that way, you won't have any problems.

Your loco contains a very early version of the Odyssey system, and they're nowhere near as smooth as today's locomotives.

I hope this helps.

TRW

Thanks for the help,

The board is a C07 version , would p/n be 691-r2lc-co7 ?

Dave Funk posted:

Thanks for the help,

The board is a C07 version , would p/n be 691-r2lc-co7 ?

Yup, but that's a zero at the end instead of the letter O. Part number is 691R2LCC07.

TRW