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1970's Synthesizer

Discussion in 'General Electronics Discussion' started by michaelmartin2758, Nov 25, 2010.

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  1. michaelmartin2758

    michaelmartin2758

    10
    0
    Nov 25, 2010
    Hi Guys

    I was wondering if some one might be able to advise me..

    I have a 1970's Synthesizer and the internal power supply has gone.
    I'm thinking of replacing rather than repairing
    The Synthesizer has +12v -6v -10v rails

    I'm thinking of using 3 power supplies
    http://www.alliedelec.com/search/productdetail.aspx?SKU=6310019

    wired together to produce the minus voltages. I'm a bit confused with the original circuit diagram 60 pages as some parts are labeled 0v and some Ground even though they seem connected.

    the question is do i connect the minus to ground.
    I have attached the diagram for the psu

    Thanking you in advance
    And Happy Thanksgiving
     

    Attached Files:

    • psu.jpg
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  2. barathbushan

    barathbushan

    223
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    Sep 26, 2009
    does the synthesizer have a ground terminal or just +12v -6v -10v rails ??

    EDIT : really silly question to ask !!!
     
    Last edited: Nov 25, 2010
  3. michaelmartin2758

    michaelmartin2758

    10
    0
    Nov 25, 2010
    rails

    hi

    thanks for replying the rails are labelled


    Gnd +12 -10v -6v


    here is another diagram

    thanks again
     

    Attached Files:

    Last edited: Nov 25, 2010
  4. barathbushan

    barathbushan

    223
    0
    Sep 26, 2009
    you said that you want to use three power supplies so do this

    1) in the first supply set the voltage to 12 v , then connect the '-' terminal to ground , and '+' termainal to +12v rail

    2) in the second supply set the voltage to 10 v , then connect the '+' terminal to ground , and '-' termainal to -10v rail

    3)in the third supply set the voltage to 6 v , and connect the '+' terminal to ground , and '-' termainal to '- 'v rail
     
  5. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,500
    2,840
    Jan 21, 2010
    Also ensure that each power supply can supply the current required on each rail.
     
  6. michaelmartin2758

    michaelmartin2758

    10
    0
    Nov 25, 2010
    Thanks very much
     
  7. barathbushan

    barathbushan

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    Sep 26, 2009
    Last edited: Nov 25, 2010
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