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sx-550

  1. triplegee77

    First Pioneer restoral - with a custom accent

    At 63, just getting back to my stereo roots. This is my second recap/restore project. First one was smooth as silk, but I had a couple novice mistakes on this one, but finally got it. Made some custom solid walnut side panels for this SX-550 and my buddy gave it a SWEET custom touch with a...
  2. triplegee77

    SX-550 Low volume right channel - Tone Amp

    So working on an SX-550 with low right channel volume and made a rookie mistake, didn't check balance function before I cleaned and recapped, so I don’t know if the issue was existing. All pots and switches have been cleaned multiple times with Deoxit. I took the input selector and...
  3. triplegee77

    SX-550 with factory transistor installed incorrectly??? AF Muting Board

    Are my eyes/brain completely shot, or is this factory transistor installed incorrectly??? I have no sound output but all test points measure correctly (and I triple-checked all of my work). This is Q3 on the AWM-101 AF Muting assy. When I measure voltage on what should be the collector (per...
  4. R

    Pioneer SX-550 Modified Bias Adjust Circuit, What Have I Missed?

    This is my first post here so please forgive any transgressions. I must also express my gratitude to everyone who has posted before me, as I have found so much valuable information here already. I am restoring a pioneer SX-550. I have replaced the output transistors with TIP41/42 pairs, and...
  5. 70smidfiguy

    Pioneer SX-550 No Right Channel FM Only

    Hey all, Restoring/Recovering an SX-550. All inputs working perfectly, all controls cleaned. FM Stereo/Muting/Signal Strength all working properly BUT right channel has no output. Only on FM. I removed and cleaned the function switch, all looks good there. Could this be one of the IC's...
  6. zeferinoj

    Which type of capacitors should I use (SX-550)?

    Hello! I'm working on an SX-550 and while building the capacitors' BoM I started wondering whether I should stick to stock or consider any upgraded components, such as film capacitors. Any advice is welcome. Thanks in advance. Kind regards.
  7. H

    Distortion in Pioneer SX-550

    I am breaking down and creating my own thread after sifting through AK and other forums with no luck. I recently got a SX-550 that I was told was had a blown channel. Both channels seem to output audio, but both channels also distort fairly quickly when turning the volume knob past 9am with...
  8. P

    SX-550 refurbish and problems

    Hello, I really need help now. Long story short, got a friends reciever in for a checkup because it sounded low and had a lot of distortion on left channel. A good cleaning, and I was ready to check everything according to service manual. Problem was that I could not set line current on left...
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