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I have an early modular board Legacy  -   F3 A  -  Non Powered Engine.

6-34647

All systems work just fine....except for the following.

On a powered track,  with command on or not....in about 5 minutes the smoke unit will just come on by itself.  I can shut it off with the smoke buttons and 5 minutes later same thing.

Is there a problem with the Radio Board...glitch / gremlin....or maybe in the smoke regulator?  

Thanks again for the assistance.

Dave

 

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Last edited by Soo Line
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The easy way is just chop the leads of the old one, leaving plenty of slack. Splice the new one onto the old wires and bolt it back down.  Be sure to get the insulating washer in there between the triac and the chassis.

The only thing to be careful of is some of the wire they use makes it hard to pick the black wire with the brown stripe, last bunch I got it was almost invisible.

I do a simple lap solder, and cover it with heat-shrink.  It's more than sufficient for this task. I tin both ends of the wires, trim to about 1/4" exposed tinned end, slip the heatshrink over one side, and then just hold them together and apply heat.  Makes a slim joint that doesn't impede getting the whole mess back in the shell.

I try to leave a little slack in the locomotive wiring so the next time I replace the regulator, I can use the same process.  Normally, I cut the regulator leads to a couple of inches.

 

Well I wired in a new smoke regulator....and unless it is by chance faulty,  I'm not sure how to proceed.

I resoldered one wire at a time from the old regulator to the new one.  All 5 wires were connected on the old regulator so I followed suit on the new one.  Both grounds were wired.

I reset (with AUX1 - 2) and tried a new radio board to no avail.

Happening Now :  The smoke unit is on all the time and will not respond to commands.  It does blow smoke.  It comes on immediately when power is applied and can only be shut off with the Smoke on/off switch.

This is early Legacy with modular boards.  I have not changed the smoke resistor yet from 6 to 8 OHM.

First 2 pics are the of the old regulator removed....the next 2 pics are of the new regulator wired in.   On the "old" regulator the brown wire next to the triac went to the smoke unit.  It did not have a black stripe...but the new regulator brown from there did have a black stripe.

Once again ....appreciate the help Guys.

 

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Thanks John.  Sorry for the confusion.

This one pic is of the new board wired in.

I traced the wires to make sure I had not connected incorrectly

 

On the right marked  S  goes to board (serial connection)

Next on the left is ground and goes to ground.

Next on the left is power.

Next on the left is ground again....going to ground on smoke unit.

Next on the left and last wire is brown and goes to Heater on smoke unit.

Could it be that the regulator is bad?   

Thanks Dave

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@Soo Line posted:

Could it be that the regulator is bad?  

Sadly, that's a real possibility.  I just got a few TMCC and Legacy ones for stock.  Given my previous experience with them, I put them on my test set and tried them out.  The Legacy ones worked OK, but the TMCC ones won't adjust the smoke volume.  They turn it on and off, so I know they're seeing the serial data.  I have older ones that some will adjust the smoke volume, and some won't.  I don't know why it's such a chore to build this simple board, but obviously it is.

Thanks John

I have another one.....like the one in white pictured.  The only one I have left.  

 

How can you tell the difference between TMCC ones and LEGACY ones ?

The shrink wrap pictured in Black in the photo below was the original in this engine.

The shrink wrap pictured in White in the photo below is the casing of the one I just installed.

Both regulators seem to be very similar with similar numbers and writing on them.

IMG_0002 [4)IMG_0001 [4)

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