That looks like the K-Line smoke unit, it's a total clone of the Lionel circuit. A diode, capacitor, and the LM78L05 regulator.
Do not forget to check the trace, especially if the resistor has been over heated. The ground path which feeds one wire to smoke fan and also the 5V regulator, some times travel from the connection around the board to one side of element and from there to the smoke fan components. I have seen them split with power to element, but no ground to smoke components. Solder bridge or jump wire restores the ground path. Or remove varnish from board under the 4 screws and that re-establishes the chassis ground. G
@gunrunnerjohn posted:Just out of curiosity, did you measure the resistance of the smoke resistor? If the fan was running, it shouldn't get that hot if it's the normal resistor. My guess from looking at the resistor is it's a lower value and it pumping out a lot of heat.
The "transistor" is an LM78L05 TO-92 5V regulator.
Hi John or anyone reading this. I have an issue with my smoke unit that I pulled from my 2007 lionel F3 ABA set. I pulled because I wanted to re pack my smoke unit and do the modification that lionel stated by drilling out a 1/4 over the fan to allow more smoke output and to remove the covered wick thats wrapped around the heating element. I noticed one of the capacitors swelled right off the board so I need to install a new capacitor. The capacitor that was on the board was rated 35v 100uf do I need to find and order the same exact one or can i use other sizes? was wondering if I can just find something close and pull it from an old circuit board rather then finding the exact part and waiting for it to ship. Any advice would be greatly appreciated
You can use a capacitor that's rated at 35V or higher, and 100uf or greater. The key requirement is that it fits in the space.
@gunrunnerjohn posted:You can use a capacitor that's rated at 35V or higher, and 100uf or greater. The key requirement is that it fits in the space.
Great! Thanks John for getting back to me so fast.
