MTH 20-20715-1 MBTA 3GS21B Genset Diesel Engine w/Proto-Sound 3.0 #3249

Mark-

Possibly the board, but I would first check for broken smoke unit circuit board traces or a broken wire/loose connection in the wire harness. A cold solder joint could also be the culprit. Try checking the continuity of each wire with a multimeter; any open circuit readings would be the point of failure.

-John

Hi John,

I will check those, thank you and if it is the board are they still available?

Mark-

The board is available from MTH Parts under part #AE1000E34; for an extra fee the board can be programmed with locomotive's name and chain/sound files (use part #Programming Fee).

-John

John , thank you for the help. It does look like it is my board. Something on there that controls the smoke fan motor. Can they be repaired? Or is it just a straight replacement? They are not inexpensive when purchased new. Seems like everything else is working as it should with the locomotive.

@chefmarkt69 posted:

John , thank you for the help. It does look like it is my board. Something on there that controls the smoke fan motor. Can they be repaired? Maybe, but requires fine surface mount soldering skills.

Or is it just a straight replacement? Yes, for many folks without the soldering skills and tools, or worse they damage the board repairing it or it just cannot be repaired.

They are not inexpensive when purchased new. Seems like everything else is working as it should with the locomotive.

https://ogrforum.com/...oke-fan-what-voltage

The specific surface mount chip for fan FET.

https://ogrforum.com/...0#158251952137681860

Hi Vernon,

thank you for the information, yes my skills are not at that level. I have heard of someone in the forum I believe his name is GG maybe? Maybe I should reach out and see if that is a repair that he does.

I can test repair.  My email is in my profile.  G

@GGG posted:

I can test repair.  My email is in my profile.  G

Email sent to you, thank you