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pioneer sx 939

  1. T

    Pioneer SX 990 Bias Issue Too High Won't Adjust

    Pioneer SX 990. Went at it cuz the left channel was posting bias readings of 200 plus mvolts. Variable pot makes little difference in bias reading but does adjust voltage into base of Q6 similar to good channel. I have tested just about everything in the circuit and replaced a few resistors...
  2. J

    Pioneer SX 939 Speaker pops

    Hi.. had my original Pioneer SX 939 gone over and repaired amp… seems the high/low cut … tone off switch and -20 db buttons are causing a pop in speakers when pushed in/out… so my question is can I go the deficit/faderlube or is this more of transistor replacement type of fix… my tech is 120...
  3. J

    Help Connecting Powered Subwoofer to Pioneer SX-939

    I have a Canadian made "Innovative Speaker Design" (ISD) "Spirit" subwoofer that has `Line In" RCA and DIN High Level Input ports on the unit, and the Pioneer has many options for adding devices but I am unsure which way to go to ensure best quality sound. Hope that others who've done similar...
  4. joaokmo

    [HELP] SX-939 - No output audio

    Hello folks! I bought a Pioneer SX-939 from a seller who initially claimed that the unit was working in good condition. Then the unit worked well in the first few days, but soon thereafter presented a crackling sound on the loudspeakers (see video attachment). So I thought that one of the...
  5. S

    Connecting a tuner to aux on Pioneer SX-939??

    i picked up an old Nikko tuner. Can I connect it to the AUX of my sx-939 to listen to it at home? I just want to test it at home. Sounded good when I got it from seller. Thanks for advice.
  6. Oldsansui441

    Pioneer sx 939 sound disappointing

    Hi, this is my first post here. I have recently bought a Pioneer sx 939 that was advertised as working but cuts out sometimes and also no fm tuner. I found the main filter caps to be leaking so l replaced these with Nichcon KG's and l also recapped the power supply board and protection board...
    • Oldsansui441
    • Thread
    • pioneer sx 939 pioneer sx-939 recap pioneer sx-939 vs yamaha avr
    • Replies: 28
    • Forum: Pioneer Audio
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