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Baldwin 645 - Couplers stay on and won't clear

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  • Baldwin 645 - Couplers stay on and won't clear

    <P class=MsoNormal style="MARGIN: 0in 0in 10pt"><FONT face="andale mono,times" size=3>I’ve identified only one issue with my Baldwin 645 that I need to correct.<SPAN style="mso-spacerun: yes"> </SPAN>After the organ has been on for about 5 minutes, the following couplers come on and won’t clear or turn off manually:</FONT></P>
    <P class=MsoNormal style="MARGIN: 0in 0in 10pt"><FONT face="andale mono,times" size=3>Positif to Pedal 8</FONT></P>
    <P class=MsoNormal style="MARGIN: 0in 0in 10pt"><FONT face="andale mono,times" size=3>Swell to Positif 8</FONT></P>
    <P class=MsoNormal style="MARGIN: 0in 0in 10pt"><FONT face="andale mono,times" size=3>Swell to Great 8</FONT></P>
    <P class=MsoNormal style="MARGIN: 0in 0in 10pt"><FONT face="andale mono,times" size=3>Positif to Great 8</FONT></P>
    <P class=MsoNormal style="MARGIN: 0in 0in 10pt"><FONT face="andale mono,times"><FONT size=3>The first Crescendo light also comes on even though the crescendo pedal is all the way up.<SPAN style="mso-spacerun: yes"> </SPAN>I’ve ordered the technical manual from <SPAN style="FONT-SIZE: 10pt; LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'">Music Electronics, Inc and it should be here very soon.<SPAN style="mso-spacerun: yes"> </SPAN><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></FONT></FONT></P>
    <P class=MsoNormal style="MARGIN: 0in 0in 10pt"><SPAN style="FONT-SIZE: 10pt; LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'"><FONT face="andale mono,times"><FONT size=3>Suggestions on where to begin looking for the problem?<SPAN style="mso-spacerun: yes"> </SPAN>I’m happy to say that everything else is in fine working order and organ sounds great.<o:p></o:p></FONT></FONT></SPAN></P>
    <P class=MsoNormal style="MARGIN: 0in 0in 10pt"><SPAN style="FONT-SIZE: 10pt; LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'; mso-fareast-font-family: 'Times New Roman'"><FONT face="andale mono,times"><FONT size=3>Thanks for any help / suggestions offered.<o:p></o:p></FONT></FONT></SPAN></P>

  • #2
    Re: Baldwin 645 - Couplers stay on and won't clear



    Darrell,</P>


    You've answered your own question -- the crescendo is the offender. The very first step of the sequence is turning on all the couplers.</P>


    When you get the service manual you'll find there is a potentiometer on the CPU board to adjust the crescendo pedal sensitivity. If the CPU board happens to have been upgraded to the newer type without a battery, there will still be a pot on there for crescendo adjustment but the board will have a different layout.</P>


    Anyway, that's your problem and the solution is very quick and simple.</P>


    Hope the organ is playing well for you. Did you ever find a pedalboard?</P>


    John</P>
    <P mce_keep="true"></P>
    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

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    • #3
      Re: Baldwin 645 - Couplers stay on and won't clear



      I have not found a pedalboard yet.Robert hassome new ones on hand but they are $1000 andthat's not in the budget at present. The rest of the organ is working just fine and it sounds great. I had another organist come by and play it and he was very impressed with the tone quality. He actually gave me two 15" speakers for it which really gives the 16' stops a rich full sound.</P>


      Thanks for your help. I'll make this adjustment when the technical manual gets here.</P>


      Darrell</P>

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      • #4
        Re: Baldwin 645 - Couplers stay on and won't clear

        <P class=MsoNormal style="MARGIN: 0in 0in 10pt"><SPAN style="FONT-SIZE: 10pt; LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'">I attempted to adjust the potentiometer, but I was not successful.I adjusted the R29 potentiometer on the CPU Board and I got 4, 3, 2 or 1 crescendo lights.<SPAN style="mso-spacerun: yes"> </SPAN>I could never get it to the point that all crescendo lights were off with the pedal still working.<SPAN style="mso-spacerun: yes"> </SPAN>So, I turned it off completely.<SPAN style="mso-spacerun: yes"> </SPAN>I rarely use it in my playing so I won’t miss it that much.<SPAN style="mso-spacerun: yes"> </SPAN><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P>
        <P class=MsoNormal style="MARGIN: 0in 0in 10pt"><SPAN style="FONT-SIZE: 10pt; LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'">Let me know if there was anything I missed during the adjustment.<SPAN style="mso-spacerun: yes"> </SPAN>I read through the technical manual to make sure I was making the correct adjustment.<o:p></o:p></SPAN></P>
        <P class=MsoNormal style="MARGIN: 0in 0in 10pt"><SPAN style="FONT-SIZE: 10pt; LINE-HEIGHT: 115%; FONT-FAMILY: 'Arial','sans-serif'">Thanks,</SPAN></P>
        <P mce_keep="true"></P>

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        • #5
          Re: Baldwin 645 - Couplers stay on and won't clear



          Might be something wrong with the pedal itself. The potentiometer on the pedal may be internally shorted or broken.</P>


          You could test that pot with a meter and see if it measure what it is supposed tobetween the two outside terminals. Then move the pedal and see if the middle terminal's resistance from each outside terminal changes smoothly.</P>


          Or, maybe there is some adjustment that can be made on the pedal itself. Next time I see one of those organs I'll try to look at the crescendo and advise you better.</P>


          John</P>
          <P mce_keep="true"></P>
          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

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