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My prized Lionel 18018 Southern Mikado from 1992 suddenly stopped working properly. The engine slowed to a crawl and the transformer circuit breaker cut the power.

Opening the tender shell, I am extremely sure the internal circuit board (part 691-8018-T17) has gone bad, since it smells funky and has gotten very hot. The part is no longer available from Lionel (not surprisingly since electronics keep advancing). The RailSounds 1.0 boards and every other board in the tender seems just fine.

So, any help would be appreciated. I had plans to upgrade this engine to Command, so I guess that'll be my best solution.

Last edited by Mikado 4501
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When in doubt, rip it out !   The simple way, yes.  I often wonder what happens to the more modern trains with electronics in them.  Since, as you mentioned, the parts are no longer made, you could rip everything out and run your loco conventional.  Oops, did I say that.  Don't let the DCC guys know......LOL

What the others said, no need to have a shelf queen these days.

You can install or have installed ERR or MTH kits, or even go the route of Battery-Powered Remote Control (all my steamers are BPRC) with kits from several manufacturers.  Hopefully we'll soon see a system for O scale from BlueRail Trains using an iPhone or iPad.

If it's your favorite engine, take the steps and fix it.

Dan Padova posted:

When in doubt, rip it out !   The simple way, yes.  I often wonder what happens to the more modern trains with electronics in them.  Since, as you mentioned, the parts are no longer made, you could rip everything out and run your loco conventional.  Oops, did I say that.  Don't let the DCC guys know......LOL

This is a conventional engine. It sounds like the motor driver board is bad if sounds still work. This a nice engine with a big DC motor, well worth upgrading to Command but you could keep it conventional if you wanted by using a Lionel DCRU or DCDR motor driver. Most everyone that does upgrades probably has buckets of these they would part with for small money. I doubt its worth it to have a component repair on your board, by the time you pay for shipping both ways, the replacement parts and someones labor.

 

Pete

Motor function is the DCRU, I have these available. The other boards support Lighting and sounds.  I am sure this is repairable especially if you state you still have sounds.

You may also want to check motor.  It could be going bad to and it took out the DCRU.  In either event I am sure we can get this repaired.  My e-mail is in my profile.  G

This engine doesn't have a remote coupler on the tender, though apparently, Lionel might've planned to do that if it didn't involve so much royalties to be paid to QSI or something...

The only thing that plugs into the square board is the plug for the back up light, so that's probably its major purpose.

The fact that I have experienced this issue about 8 years prior with another one of these engines tells me that some of these boards are prone to overheating and failing over a matter of years.

It is old, upgrade it.  Have someone do it that knows the boards.   Nobody would want to fix a 1992 computer with original parts.  Go ERR od DCS.   A new DCRU can be had if needed.  I have several of those older boards but would not pass them on.  That was always a great looking engine and will be great upgraded.

Last edited by Marty Fitzhenry

RailSounds 1.0 didn't use any battery back up systems, unlike Proto 1.0, though part of me wishes Lionel did.

I'm personally looking for a later, improved substitute anyways that WON'T get so hot during operation.

Not sure whether to upgrade to command yet. ERR doesn't have a wide variety of sound choices, whereas MTH Proto 2/3 does, but DCS isn't quite as reliable for my club's layout as Lionel TMCC/Legacy.

Last edited by Mikado 4501

If DCS is not performing right on your club layout, it is the layout and not DCS.    The PS-32 boards are great.  I see many layouts (club)  that are not wired right and never will be because all the experts who have a say in the matter want to do things their way and not the correct way.   It is below some people to get proper advice.  A guy with a home layout takes the time to seek good information.  

 

Any large layout can be properly wired for DCS.  

 

Well,  NOT THE CIRCUIT BOARD!  The key comment Thomas stated is it "started to slow to a crawl".  An amp meter would have helped on this.  What actually happened is the rubber motor mount grommets had gotten hard and were breaking.  The Motor was loose and the clearance is really tight.  The flywheel was binding on the motor bracket mount screws.  So the slow to a crawl was the motor binding and causing the DCRU to source about 5 amps to the engine.  The burnt smell was the AC pickup wires in the engine which started to melt.  PITA to disassemble to get at screws on motor bracket, but 4 new grommets and it is running fine. 

The circuit boards are early Rail Sounds double stack (hard soldered), a RS Power Supply board, a 6V CV board with direction control for tender light, and the DCRU.  G

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