Pioneer SA-9900 Power switch replacement

Discussion in 'Pioneer Audio' started by quadmatrix82, Oct 10, 2017.

  1. quadmatrix82

    quadmatrix82 Active Member

    Messages:
    225
    Hi pioneer experts, wondering if anyone knows of a good new power switch replacement for a pioneer sa-9900? The contacts in mine are too far worn to be saved, any advice appreciated!
     

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  2. quadmatrix82

    quadmatrix82 Active Member

    Messages:
    225
    Additional photo from another thread hoping that someone can recommend a suitable replacement
     

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  3. quadmatrix82

    quadmatrix82 Active Member

    Messages:
    225
    No suggestions?
     
  4. larryderouin

    larryderouin You can be sure if it's Westinghouse??????? Subscriber

    Messages:
    20,153
    Location:
    Glen Burnie Md.
    Have you opened it up and physically cleaned the slide components inside with an Ink Eraser, or just De-Oxit? Sometimes they need dis-assembly and physical cleaning.

    SA-9900 uses the same power switch as the following units: PIONEER Part # ASG-043
    QX-747
    QX-949
    QX-949A
    SA-9900
    SA-9500
    SX-535
    SX-636

    Contact Danny @ www.yesterdaysaudio.com . He deals strictly with 70's PIONEER GEAR. Keep the old switch and clean it physically. It may surprise you.
     
  5. quadmatrix82

    quadmatrix82 Active Member

    Messages:
    225

    Thanks I’ll look out for a used switch was hoping to find a new substitute. My switch can’t be repaired the metal contacts are too far worn the pads have deteriorated too much so thinking a new substitute is the way to go.
     
  6. LesE

    LesE 110284 Subscriber

    Messages:
    643
    Location:
    Ontario, Canada
    Looking at your photo, it appears that your power switch has 4 terminals so you amplifier may be a muli-voltage unit. If this is the case, I believe your part number will be ASG-070.

    Les.
     
  7. larryderouin

    larryderouin You can be sure if it's Westinghouse??????? Subscriber

    Messages:
    20,153
    Location:
    Glen Burnie Md.
    OK. The ASG-070 can also be found on the SX636, QX747A, and QX-949A multi voltage units. Look on the back of the 9900 for the type sticker. Should be something like KCU, D, GN, SG, etc. Also look for a Multiple voltage connector plate. Let us know. Note that the only manual I could find on a 1/2 dozen sites was the KCU (120V) only which uses the ASG-043. But the pioneer parts site gives the listed units for the switches listed.
     
  8. LesE

    LesE 110284 Subscriber

    Messages:
    643
    Location:
    Ontario, Canada
    Correction: According to the service manual for the SA-9900 models D (multi-voltage) and GN (220V only), the power switch part number is ASG-077-B.

    Screenshot_20171014-173209A.jpg
     
  9. efzauner

    efzauner New Member

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    13
    In case you haven't found a replacement. What if you just used the switch to control low voltage/current to a relay? You could put this in the cabinet with minimal mods.
     
  10. quadmatrix82

    quadmatrix82 Active Member

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    225
    Hi all sorry for the delayed response it’s a multivoltage unit still yet to find a switch but will keep looking!
     
  11. quadmatrix82

    quadmatrix82 Active Member

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    225
    Just curious why does the switch need to be different if it’s miltivoltage or not??
     
  12. efzauner

    efzauner New Member

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    13
    if this switch contact pads are worn so that they can no longer support full 120V power and current, but maybe they can still support low voltage/current switching to drive a relay that will switch 120V and full current...
     
  13. quadmatrix82

    quadmatrix82 Active Member

    Messages:
    225
    Thanks efzauner I prefer to keep it all original but this might be a last resort
     

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