Originally Posted by gunrunnerjohn:
The TMCC Direct Lockon also kill DCS signals dead, so I've stopped using them. I feel the PH180 and a TVS in the TIU are sufficient for track protection. Some, but not nearly all of my locomotives have TVS protection installed. I have a couple that are in the backshop now for work, they'll get them before they leave. 
It took me quite a while to figure out why one would even need a TMCC lockon. A lot of the Lionel stuff seems either complicated or redundant and explanations weren't always clear from the catalogs. They had so much stuff compared to MTH and DCS. I am learning though, now that it's all changing to LCS. 
Some of the recent posts with the rubbing and pinched wires have me thinking about starting to look at the innards of my engines. Some may be getting a TVS soon.
Thanks for the schematic, I might even be able to cipher some of it. Fun to look at anyway.
