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  • T-412 Vibrato Issue

    Hi All.

    I have a T-412 which has recently developed an issue, along with a few problems still yet to be resolved.

    The main problem is that the pedals and manuals only make sound with vibrato engaged. Happened all of a sudden just the other day. Sounds normal with vibrato on... Perc. & vibrato off = Nothing. Percussion sounds come through regardless.
    Any ideas as to what might cause this?

    Also; the Reiterate function is non-functioning as well. It's been this way since I got it. When switch is engaged, the perc. volume drops in the lower harmonic range.

    Thanks in advance.
    Dit
    '58 M3 w/custom frankenLeslie, '71 T-412, Farfisa Combo Compact, Cordovox (Elex) Electronic Piano, various other Kurzweil & Korg synths. I have GAS.. ;-)

  • #2
    Sounds like a faulty pin and post connector causing a bad contact between the circuit boards

    To assist in understanding how these T series organs work, I suggest you visit the keyboard partners website where there is clear schematics and info available on repairing and modifying the T organs.
    Other people may chip in with more specific advice

    Comment


    • #3
      Sigh, I've had this one before, can't remember what it was exactly....

      BUT the first thing to check is the blue trim knob on the vibrato amp, I recall it's over near the pin with the violet wire which connects the perc, vibrato and recovery amp outputs together.
      That trim knob balances the output of the vibrato and clean sounds, it can knock out the clean sound altogether, even when vibrato isn't "on".
      -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
        Hey fellas thanks for the replies.
        I've looked for the trim pot as suggested but can't seem to locate it. On which board/area is it situated? I'm fine to do some disassembly but want to be headed in the right direction. Thanks again
        '58 M3 w/custom frankenLeslie, '71 T-412, Farfisa Combo Compact, Cordovox (Elex) Electronic Piano, various other Kurzweil & Korg synths. I have GAS.. ;-)

        Comment


        • #5
          Ah! We're lucky... Carsten Meyer has highlighted it here in green:

          Click image for larger version

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          -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

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