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T-412 New owner

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  • T-412 New owner

    Resurrecting a neglected 412! Looking for a detailed wiring diagram of the Vibrato Drum Scanner. When I got it, the drive belt was in pieces in the bottom of the organ and the gray wire with 2x female circular leads was hanging unattached. I now have the drive belt (o-ring) but have no idea where to connect the wire. Alas the Vibrato does nothing currently. I have a bit of speaker hum also, but otherwise she is sounding good.

    Any help would be great...even a photo of where the wires go instead of a wiring digram would suffice. Happy to video conference to discuss further.

    Greg

  • #2
    This will get you started.... https://archive.org/details/T500Serv...PAGESREORDERED
    Service manual produced by the Hammond Organ Company for T-500 Series organs.This is a higher res copy than the current archive: sourced from a scan made by Mr...
    -1958 Hofner 550 archtop guitar -1959 C3 and PR40- -1964 Busillachio Harmonium- -1964 M101-
    -1967ish Leslie 122- -1975 T500 (modded..chopped, and reassembled!)-
    -DIY 760 FrankenLeslie/rat hideout-
    -1980 Electrokey Electric Piano- -Yamaha electric Harmonium (early 80's?)-
    -1990 Jansen GMF150 amp- -1992 Korg 01W/fd- -1992 G&L S-500 geetar.

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    • gbcotten
      gbcotten commented
      Editing a comment
      Thanks, I did find that one online already and so far have not been able to identify the gray leads. I have a Rhythm II and not a Rhythm III as well so not sure what has changed. There are plenty of "spare" male plugs on the circuit boards, but I cannot just see what happens when I connect things at random.

  • #3
    The wires sound very much like the ones leading to the reverb tank. Is that attached?
    -1958 Hofner 550 archtop guitar -1959 C3 and PR40- -1964 Busillachio Harmonium- -1964 M101-
    -1967ish Leslie 122- -1975 T500 (modded..chopped, and reassembled!)-
    -DIY 760 FrankenLeslie/rat hideout-
    -1980 Electrokey Electric Piano- -Yamaha electric Harmonium (early 80's?)-
    -1990 Jansen GMF150 amp- -1992 Korg 01W/fd- -1992 G&L S-500 geetar.

    Comment


    • #4
      Was hoping that was it, but there are no unoccupied pins on that board. The Percussion board has multiple unoccupied pins (023-041242, 124-00114). Otherwise without taking the upper section off, there are no other visible pins. A correction is that the wire is BLACK now that I have cleaned it up, so far all internet searches have not resulted in anything useful as the T500 must be more advanced and the circuit boards were updated.

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      • #5
        If there are any members of the forum with a T-412 who would be willing to FaceTime/Skype whilst looking at the organ internals, I am sure we could quickly get to the solution.

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