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sx-780 issue

  1. A

    Pioneer SX-780 Goes Nuts for a Second

    I have an SX-780 that plays fine... mostly. After around 20 minutes of use, the volume of the right channel will instantly increase (by a lot) with treble-y distortion... for ONE SECOND. Then, back to normal. 1. It has been serviced and had STK-0050s replaced last year. 2. It went back to the...
  2. A

    Pioneer SX-780 Goes Nuts for a Second

    I have an SX-780 that plays fine... mostly. After around 20 minutes of use, the volume of the right channel will instantly increase (by a lot) with treble-y distortion... for ONE SECOND. Then, back to normal. 1. It has been serviced and had STK-0050s replaced last year. 2. It went back to the...
    • Artstronauts
    • Thread
    • interference pioneer stk-0050 sx-780 sx-780 issue sx-780 volume
    • Replies: 16
    • Forum: Solid State
  3. Trompi63

    SX-780 project . Relay clicked but no audio

    Guys, A couple years ago, I picked up an Old SX-780 receiver . It worked fine until one channel started getting a lot of humm .. so I decided to upgrade this baby with newer caps transistors and probably change a bad STK. Sure enough one stk was the cheap ones being sold on eBay. So I started my...
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