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    Pioneer SX-650 Help

    Hey everyone, I have a Pionner SX-650 and I would like some help with it. It works good except it does not work on Phono or Aux. I have a service manual for it but I still need some help. I’ve worked on this receiver a little. I recapped the power supply board but that’s it. I bought this...
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    Kenwood Kr-9400

    I am replacing the power transistors and the part numbers are 2SB539 and 2SD287. In the service manual it says I could also use 2SB554 and 2D424. I found the 2SB554 but the 2D424 I found was a 2SD424. Is the 2SD424 the same as the 2D424? Thanks I am new to all this so any help is appreciated...
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    Kenwood Kr-9400

    Hey everyone I have a Kenwood Kr-9400 that I bought yesterday and the volume pot is seized. I've tried spraying deoxit and no luck. Thanks for any advice.
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