Original PM-1 Repair

It's odd those four would have gone, they appear to be simply .1uf capacitors.  I'd replace all four of them with the appropriate part and see what happens.  Are these actually blown as in cooked?  That really surprises me unless someone REALLY abused this unit.  They appear to be simply some cheap spike protection, maybe they were just defective.  You might want to replace C29 as well.

I used to have an old dead PM1 around, but I think I may have finally deep-sixed it, I can't find it now.

Two co-workers who are an electrical engineers also thought that they were just rudimentary noise/spike protection, and thus I should be able to run it without them to test the rest of it, which I might do, but I will replace them if the unit works.  Yes, one of them did say that his concern is why they blew.  And by blew, I do mean they exploded.  The whole reason I opened it and found the blown caps is because it rattled, and I know enough to know a solid state electrical device shouldn't ever rattle.  If I get a chance to mess with it in the next day or two I'll take a photo or two of what is left.

I only have 180W Phs, will that be fine?

The PH180 will work, obviously you don't want to draw more than 135 watts through that PH1.

All those caps do appear to be just some noise suppression, but it amazes me they actually blew, that's pretty unusual for ceramic caps! 

I know this is a PowerMaster thread but I recently had my LEGACY CAB-1L/Base-1L Command Set repaired by Lionel to correct an issue I was having with TMCC-equipped engines.

Here is the repair performed. I'm curious, does anyone know what this means?

Looks like they replaced a .1uf cap.

Maybe they were a bad batch, who knows.  I think this things has floated around from person to person for a while.

As for the power, I don't plan on running a train with it that I can't power with a CW-80 for testing, so I shouldn't break 100W.  If it does work, then I'll figure out how to mod it for 180W, or just get a 135W PH for this one.