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GGG said, "Connectors look like they are marked.  G"      G,  yes they are marked  (TRK - TRK - SMK - SMK) below the 4 pin plug with OUTPUT above the plug.      The two pin plug  is marked  (SMK-  SMK+) .   I can make some guesses but they would be guesses.  I'm more worried about the other boards in the loco and the motor in the smoke unit, than this chuff board.  So before I start guessing I thought it prudent to see if I could find the actual wiring diagram.   J

TAS smoke schematic

John said,  "sure doesn't look like the      TAS puff-n-chuff board."   Ya Think !   I traced out a schematic last night photo attached.  The relay will pick up at 6v 46ma so I can switch it with a reed switch and power it with the 6V headlight regulator from a PS-1 loco.    I would have a set of contacts for the fan and another for the chuff input on the  ERR CRUISE COMMANDER.    If you have any thoughts I would like to hear them.  I think the fact the input for the relay is marked +smk and -smk yet it goes straight to a bridge rectifier is interesting.  If it took power from the smoke output from most of the TMCC boards I know of,  is that not half wave DC might the capacitors and the bridge be to keep the relay from chattering.   Does look like a simple on / off for a diesel smoke unit.  I'm going to see how many cycles it can do as a chuff / fan switch before the contacts fry.  J

 

102_6377

 

 

 

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  • TAS smoke schematic
Last edited by JohnActon

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