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pioneer sx-950

  1. triplegee77

    SX-950 AWH-050 Board Pulls Down 51v and 35v Rails and Won't Pass Dim Bulb

    I acquired this SX-950 that someone previously attempted a repair/restoration on. It would not pass dim bulb. Problem is isolated to main amp board. Here is what I have performed so far: Verified previously replaced components on every board (while most caps were Nichicon and Wima, there were...
  2. G

    SX950 full restore

    I am looking for a quick connect solution for the terminal post on each of the boards so I can remove them soldering parts does anyone know of connectors that could slip over the original posts, or if this is even possible? I thought maybe it would be a good idea - Please advise Thank you in...
  3. daveyh

    Pioneer SX-950 relay not clicking voltages not right. THANKS!! MARK.

    I have a rebuilt the power supply, the protection board and the amp board with all new caps and transistors and checked the diodes mounted to the heat sinks and replaced all adjustment pots with new Bourns according to the AK post available here. I have done this before any times on different...
    • daveyh
    • Thread
    • no relay click pioneer sx-950 voltages
    • Replies: 17
    • Forum: Pioneer Audio
  4. daveyh

    Pioneer SX-950. One channel sounds like an AM radio

    My Pioneer SX-950 has a problem. When I turn the balance pot to the right channel it sounds like an AM radio. Years ago I rebuilt this unit with all new capacitors including the two large main filter caps and new transistors. All the controls have been cleaned with electronic cleaner, The DC...
    • daveyh
    • Thread
    • pioneer sx-950 right channel missing bass
    • Replies: 25
    • Forum: Pioneer Audio
  5. Brivan

    Pioneer SX-950 Speaker Pop at Power-Off

    Hi, everyone I have a Pioneer SX-950 that makes an audible "pop" noise through the speakers when powered off. I have no detectable noises from any of the controls in either the flat amp or preamp. I've read through many threads on AK for a solution to the problem and have implemented some of...
    • Brivan
    • Thread
    • pioneer sx-950 pioneer sx-950 pop pioneer sx-950 power off pioneer-sx-950 power-off
    • Replies: 26
    • Forum: Pioneer Audio
  6. Brad Helms

    SX-950 Recap

    Finally got all the capacitors from Digi-Key still waiting on a couple transistors which has been about eight weeks. Thought I would get started on my project and ran into something I’m not familiar with. Three pins on a capacitor the C 12 in the manual calls for 1000 µF 35 V capacitor but the...
  7. Brad Helms

    Pioneer SX-950

    Just finished replacing two main power caps one was blown so I replaced with a matching pair. I have new caps for amp board but thought I would fire up before I go to the next step. Upon firing up I’m getting intermittent speaker relay cut off. Hooked to speaker B same same instead of just...
  8. Jcamp

    Pioneer SX-950 Repair

    Hello, I need some help with a SX-950. I received it with the following components blown Four power transistor - Replaced all with "original" 2SB557/2SD427 from eBay Both 2SB536 One C1628 Both Bias pots blown 150 ohm R40,R39 I have replaced these transistors 2SB536 with KSA940 2SD381 with...
    • Jcamp
    • Thread
    • pioneer pioneer 950 pioneer sx pioneer sx 950 pioneer sx-950 pioneer sx-950 repair sx-950
    • Replies: 14
    • Forum: Pioneer Audio
  9. C

    Advice on various pieces of equipment

    Hey all, I'm brand new to this forum and just getting started in the world of vintage audio. My father was a bit of an audiophile and I was left his equipment after his passing. I would like to hear from you all experienced pros on which equipment I should keep, sell, which piece is better...
  10. G

    PIONEER SX-950 STARTED CUTTING OUT PLEASE HELP NEED TO JAM

    I was on the computer listening to my SX-950 at a low volume thinking I sure do love my 950. I decided to put to put some good tunes on and turn it up a little. I barely turned up the volume all 4 speakers started cutting out. I can't get past the first mark on the volume knob without it doing...
  11. G

    Pioneer SX-950 Tuning knob set screw stripped.

    Greetings everyone, I recently purchased a SX-950. Upon removing the face plate I see that the 1.5mm set screw is rounded out. Does anyone have any advice on the next I should take to remove the tuning knob?. Thank you for any advice.
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