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Problems Rodgers Allegiant 698

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  • Problems Rodgers Allegiant 698


    Hello for all,

    I am Brazilian and we no longer have any Rodgers dealerships in our country since Rodgers' departure from the roland group.

    It happens that there is a church of ours that owns Rodgers Allegiant 698 that has been presenting the following problem.

    When the organ is turned on and starts playing, it emits a "pooft" noise and stops sound.

    The instrument remains on but does not emit any sound. When the instrument is switched off and turned on again, it will start to function again, then make the noise again and stop sound.

    An assist technician Roland has been trying to help us unsuccessfully, could anyone tell the problem?

    Follow the video with the problem being presented:
    https://www.youtube.com/watch?v=6OJz...ature=youtu.be

  • #2
    That is terrible. :( There are those way more familiar with the Rodgers digital instruments than I am. My Rodgers is an old analog beast.

    My opinion for what it is worth is I believe you have a part of your power supply that is overheating. Then when it cools the instrument can work again. You should test all of the power supply outputs for power when the organ is first tuned on. Then check them all again after your sound has stopped. Perhaps you will find a portion of the power supp;l that is giving you trouble.

    Now let's bring in the real Rodgers digital organ experts so they can tell you where-else you should look.
    Until The Next Dimension,
    Admiral Coluch.

    -1929 Wangerin Pipe Organ Historian
    -Owner 1982 Rogers Specification 990

    Comment


    • #3
      The first thing to do is to go very carefully from one unit to the other within the console and make sure every cable and every connector is tight. A plug or connector that is even slightly loose could be losing contact and causing the system to go down. Check especially around the major assemblies on the shelf right behind the keyboards. I noticed that the lights went off on the large board inside the metal cover near the left as looking in from the rear. Check anything that is attached to that unit very carefully, as well as the other ends of these cables.

      The power supply is the assembly at the treble end of the shelf with the large heat sinks on it. Be very sure that all the cables are snug going in and out of that unit. Also, gently poke and prod on the circuit boards to see if any component is loose, such as a chip or other part in a socket.

      The trouble reminds me of the problems that used to develop on certain models when a little crystal inside a rectangular metal box would lose contact with the socket into which it was plugged, but I don't think this model has anything like that. But the tone generator board probably plugs into the system with a large 100-place card edge connector, and that is a possible point of trouble. If you can do it easily, unplug it at that point, then carefully and firmly re-install the plug onto the board.

      Worst case, you may have a problem with the tone generator board, which would require ordering a new one from Rodgers. But it may be fine once you get everything perfectly snug and tight inside the console.
      John
      ----------
      *** Please post your questions about technical service or repair matters ON THE FORUM. Do not send your questions to me or another member by private message. Information shared is for the benefit of the entire organ community, but other folks will not be helped by information we exchange in private messages!

      https://www.facebook.com/pages/Birds...97551893588434

      Comment


      • #4
        Originally posted by jbird604 View Post
        The first thing to do is to go very carefully from one unit to the other within the console and make sure every cable and every connector is tight. A plug or connector that is even slightly loose could be losing contact and causing the system to go down. Check especially around the major assemblies on the shelf right behind the keyboards. I noticed that the lights went off on the large board inside the metal cover near the left as looking in from the rear. Check anything that is attached to that unit very carefully, as well as the other ends of these cables.

        The power supply is the assembly at the treble end of the shelf with the large heat sinks on it. Be very sure that all the cables are snug going in and out of that unit. Also, gently poke and prod on the circuit boards to see if any component is loose, such as a chip or other part in a socket.

        The trouble reminds me of the problems that used to develop on certain models when a little crystal inside a rectangular metal box would lose contact with the socket into which it was plugged, but I don't think this model has anything like that. But the tone generator board probably plugs into the system with a large 100-place card edge connector, and that is a possible point of trouble. If you can do it easily, unplug it at that point, then carefully and firmly re-install the plug onto the board.

        Worst case, you may have a problem with the tone generator board, which would require ordering a new one from Rodgers. But it may be fine once you get everything perfectly snug and tight inside the console.

        Hello,

        Thank you for your information!
        We will try to check all the connectors today.
        The tone generator (MSP2) at Roland Local had one and we switched to test and we continue with the same problem.

        The interesting thing is that when we turn on the organ the first time after some time stopped it takes to time more the make noise and to turn off the audio.

        If we turn off and on again the noise and shutdown times are getting shorter and shorter as if it were really something that heats up and turns off.

        Is it something on any audio card? Could you tell me what the audio card is on this model?

        Comment


        • #5
          I don't have any service literature to tell me specifically about the boards in that model. But once you have checked all the cables and interconnects, let me know the status and I'll try to find some more info on the model.
          John
          ----------
          *** Please post your questions about technical service or repair matters ON THE FORUM. Do not send your questions to me or another member by private message. Information shared is for the benefit of the entire organ community, but other folks will not be helped by information we exchange in private messages!

          https://www.facebook.com/pages/Birds...97551893588434

          Comment


          • #6
            If it's a component causing it, "freezing spray" may be able to assist you. It's harmless to components but great in finding something like a capacitor or semiconductor that fails when heating up. It's available from electronics distributors. Comes in a can with a nozzle. You spray the area suspected and if things go back to normal you found it. Just one more tool....
            Just don't hit anything glass :-P ( learned from old-time circuitry!)

            John
            Can't play an note but love all things "organ" Responsible for 2/10 Wurli pipe organ, Allen 3160(wife's), Allen LL324, Allen GW319EX, ADC4600, many others. E-organ shop to fund free organ lessons for kids.

            Comment

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