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Hello, I have a TMCC Powermaster 1 and what has happen is the power adapter cable 6-12893 fuse has blown and I am having a hard time finding a replacement for it. Can any one tell me where I can find them? It looks like on the side of the fuse it says 8A 250 V. It has a spring in the middle of it. Do you think Lionel would have anymore in there inventory? Thought I would try here first. 

 

Any help would be great as the powermaster itself is still in great condition. 

 

Thanks and have a great evening,

David

 

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Automotive fuses are 32 volt fuses. When/if they blow, they can fracture in the holder and it is not guaranteed that they will completely open the circuit when used at higher voltages. David needs a 250 volt fuse that will withstand the voltage if it blows. It also sounds like it is a slo-blow fuse. Automotive fuses are generally all fast-blow. An electronics store would be the place to get it or Digikey or Mouser on line. Maybe All Electronics too.

Also wondering why it blew.

Last edited by cjack
Originally Posted by cjack:

Automotive fuses are 32 volt fuses. When/if they blow, they can fracture in the holder and it is not guaranteed that they will completely open the circuit when used at higher voltages. David needs a 250 volt fuse that will withstand the voltage if it blows.

Since the PowerMaster is running on 18 volts input power, why does he need a 250 volt fuse?

Originally Posted by CygnusX1:

Sometimes.... I wish that Lionel hadn't made any of this TMCC equipment.. I sometimes wonder by these posts ( and by personal experience),if we don't spend more time diagnosing what's wrong rather than enjoying running.....

Boy I could not disagree more with you on this, I, we high railers and toy train guys in the Badgerland club never had more fun than we have now using TMCC and Legacy. We have had some glitches but for the most part, after a learning curve, the systems are pretty much trouble free. If you consider the number of people out there using TMCC/ Legacy the problems become a small part of the total picture. I am going to add a link to this post, you would never do this with only transformer operated trains. Yes there are some drawbacks but the fun far outweighs the bad.

Ray

 

https://youtu.be/K1nEZ4ALW5Q

I guess it's just me then. Their smoke units leave a lot to be desired, and yes, I'm one that believes in using the smoke unit. If they're not going to smoke, then don't put them on.  AND if they're going to put them on, then they need to work as advertised... Not smoke for a few days and then quit. I understand that you have to add fluid and that sort of thing, but it seems to me that they are not very dependable.

 

 

Well, must be time for me to buy newer stuff then. I'm stuck on these early 98-99 units that are upgradable in terms of TMCC & R.S , although I did buy a newer Mikado Jr. that was TMCC equipped that did really well for a few days and then... Poof, just quit smoking. I mean, the little starter 4-4-2's put out "boo-koo"'s,(sl) of smoke. I'm not even concerned with the amount , just the dependability of them.

Originally Posted by gunrunnerjohn:

I don't have any more issues with smoke from Lionel than from MTH, other than the run of bad smoke motors Lionel had recently.  Being the designer of the Super-Chuffer, it should be obvious that I'm a smoke fan.  MTH smoke units have traditionally had better smoke output, but most of the newer Legacy stuff generates plenty of smoke.

 

I don't know about this statement.  To many even recent Lionel engines flashing code or requiring a fan motor change.

 

That is rare for MTH.  I have seen PS-1 engines still smoking on original parts.

 

The MTH fan only needs to be chanced after it is submerged in smoke fluid, or really really used.  G

A major difference is the MTH boards don't attempt to sense the current drawn by the smoke motor, so if the motor was drawing excessive current, the first clue is something stops working.  I took a motor out of an MTH locomotive recently that was drawing almost 200ma, the clue was it started making noise.  The locomotive was still running and smoking, it didn't seem to mind the bad motor.  With the Legacy sensing circuit, that motor would have been flagged bad long before this time.

 

A number of the motors that were flagged bad by the Legacy seemed to be fine on the bench when I tested them.  There were also a couple that drew excessive current, so clearly bad.  It's possible the Legacy circuit is being a bit too critical of what a bad motor looks like.

 

As Jon has stated the over current can damage the board and require replacement.  Since MTH could be repaired at component level it wasn't as critical.


When MTH fans go south bad, the engine will start acting erratic.  The FET is still ok, but it plays havoc with the 5V DC and the board lets you know. 

 

It still seems interesting to me since these motors can't be that different in manufacturing, but Lionel units are still sensitive to the over current/noise.  G

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