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sx-880

  1. C

    SX-890 Tripping Protection Circuit

    So...I'm new to AK but need some help with my SX-890. I bought it when stationed in Korea in '78 and before it was out of warranty one of the channels died. The other one died after warranty and I had it fixed. Now the are both out...again. When I turn it on it will power up and show what...
  2. dudeface

    Pioneer SX-880 Recently Moved, Now Relay Click Is Intermittent

    Hi. Sorry for another Pioneer protection-mode thread. I feel like this one could be fairly easily solved. It always worked fine up until I moved into a new house last week. It was packed well and went in a moving truck. It worked the day I set it up in the new house. Today, there was no relay...
  3. Brivan

    Pioneer SX-880 DC Offset High

    Hello, all I have a Pioneer SX-880 on the bench that is exhibiting high negative DC offset. The receiver originally had two blown 1-amp fuses: FU2 & FU3 (I chuckle whenever I see FU2). I found D26 shorted, as well as Q29 & Q30 with shorted junctions. All were replaced with correct modern...
    • Brivan
    • Thread
    • offset pioneer sx-880 pioneer sx-880 dc offset sx-880 sx-880 dc sx-880 dc offset sx-880 offset
    • Replies: 2
    • Forum: Pioneer Audio
  4. Brivan

    Pioneer SX-880 Protection Relay Dropping Out

    Good afternoon, I have a Pioneer SX-880 with a protection relay issue I've been battling with for the last few days. Typically, the protection relay will briefly drop out after the receiver has been powered up for a minute or two. This may happen a few more times - about at 30-second to...
    • Brivan
    • Thread
    • pioneer sx-880 pioneer sx-880 protection relay pioneer sx-890 protection relay pioneer sx890 sx-880 sx-880 protection relay sx-890 sx-890 protection relay
    • Replies: 22
    • Forum: Pioneer Audio
  5. N

    SX-890 Bias and Protection Issue

    Trying to wrap up a refurb of an SX-890 and can't get one channel to bias (DC Balance) and it won't get out of protection. At one point it would get out of protection but wasn't stable on on either channel when trying to DC Balance At this point, on the Right Channel I get ~ -35V at pin 12 and...
  6. mordechai

    SX-880 relay clicking with change in home lighting

    Hey everyone, new to the AK forum. I've owned a beautiful sx-880 for about 10 years. I recently moved to an off-grid home (panels, batteries, schneider inverter...the whole bit). It's a high end off-grid system and literally every electronic device in my home works flawlessly, including...
  7. Brivan

    Pioneer SX-880 2SK34 FET Replacement

    Hi, all I've got a Pioneer SX-880 that apparently has one bad 2SK34 in the power supply and I'm planning on replacing it with an NTE312 per some threads I read here. I've discovered from the datasheets that the source and gate leads are swapped between the 2SK34 and NTE312. The transistor...
    • Brivan
    • Thread
    • pioneer sx-880 pioneer sx-880 2sk34 sx-880 sx-880 2sk34
    • Replies: 34
    • Forum: Pioneer Audio
  8. dustmaker

    SX-880 with protection issues

    Ι’m repairing a SX-880 going into protection. I’ve already replaced the two caps and transistors in the protection circuit that often go bad. That fixed the initial problem and the unit now works but only when volume is below 1/4. Unit works with both 8ohm and 4ohm speakers until it trips...
  9. Mightyhal

    Can't balance DC on SX-880 after repairs

    Following up on https://audiokarma.org/forums/index.php?threads/sx-880-output-transistor-replacements-b705a-2sa1075.961503 -- I've had some ups and downs repairing the SX-880 (I'd shorted part of the power supply with a probe slip, and one of the output chips had shorted--one which had been...
    • Mightyhal
    • Thread
    • 880 bias circuit dc balance dc offest sx-880 transistor equivalent transistor replacement transistor substitute
    • Replies: 6
    • Forum: Pioneer Audio
  10. Mightyhal

    SX-880 Output Transistor Replacements (B705A, 2SA1075)

    I have a SX-880 with some issues at moment, partially self-inflicted when I let a probe slip while checking the voltages when powered on (building a dim bulb tester now that the horse has left the barn). So, I have a list of components which I'm buying, with the plan to test and replace with a...
  11. S

    Pioneer SX 880 Balance and bass/treble inconsistent vol

    Ugh. I have an old Pioneer SX 880 that is sick and The speaker channels are out of sync volume wise and balance must be constantly adjusted in parallel. The Left channel has WAY more bass the the right. Probably too a fault although the right can use a little more, sounds very dry...
    • sdineen
    • Thread
    • channel pioneer sx-880 tone adjustment
    • Replies: 11
    • Forum: Pioneer Audio
  12. louye2

    Pioneer SX-880, FM Hum

    A friend recently gave me his parents' vintage SX-880 stereo receiver. It powered up nicely and I was able to play CDs through the AUX inputs and records through the PHONO inputs with fairly nice sound (slight hum). However, the FM radio has very loud humming coming from both channels. It is...
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