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sx-636

  1. 6

    SX-636 - Restoration Help

    Hi everybody! I am in the middle of restoring a Pioneer SX-636 receiver. When I got it, there were multiple blown fuses in the power supply, a dead channel, and very faint sound out of the working channel. Thanks to reading through tons of old threads here at Audiokarma, I was able to get her...
  2. SX-636

    SX-636

    My Pioneer SX-636, mid-restoration. March 2023.
    • 68krazy
    • Media item
    • pioneer sx-636
    • Comments: 0
    • Category: Member's Component
  3. zezima

    Pioneer SX-636 high pitched noise / feedback in PHONO channel

    Hi y’all, first time long time.. I have been using a SX 636 for the past year, initially just with a tape deck and AUX cable (phone) while I was waiting to ship my record player (LP120-USB) to myself from storage in my home state. Once I got my turntable successfully shipped and began using...
    • zezima
    • Thread
    • feedback high pitched lp120-usb noise pioneer sx-636 sx636
    • Replies: 1
    • Forum: Pioneer Audio
  4. Chiamac

    SX-636 Review and Thoughts

    My dad bought one of these back in the late 70's, 1977 I think, new from a store in Fargo North Dakota. I still have the original receipt somewhere, along with the brochure or user manual. This was the family stereo growing up, along with some medium sized pioneer speakers that eventually fell...
  5. mstewart

    Are yellow Nippon Chemi-Con caps low leakage?

    Trying to find out some information about the differences between the black and yellow Nippon Chemi-Con caps used in vintage stereos. I came across a thread that claimed the yellow caps were low leakage types. Yet, I am finding them in locations where the bom for a SX-636 has replaced them with...
  6. mstewart

    Pioneer SX-636 recap power supply question

    Hello, I recently began a recap of my SX-636. I just started working on the power supply which has been recapped with the transistors replaced. I have not changed any diodes. Before I move forward I started measuring voltages and am comparing them to the service manual. Everything is checking...
  7. V

    SX-636 no longer working properly after using DBT

    To preface this, I am new to audio repair and definitely did not think I was going to be getting into a full repair with this receiver. I'm handy with a soldering iron and have a multimeter, but I don't have a huge amount of experience or knowledge with electronics. I'm excited to learn, but...
  8. I

    SX-636 static only

    Hi, I just cleaned out and replaced the fuses on a SX-636 that had not been working. Now the right channel works great (both A+B) but I get heavy static on the left channel (both A+B) as soon as I attach a speaker wire, even with nothing playing. Can anyone give me some guidance on what could...
  9. dlucy

    Silver-face era Pioneer SX-x2x and SX-x3x receivers with gold or bronze face

    I've seen several comments about "gold" or "bronze" colored Pioneer SX receivers from the "silver-face" era. I've collected quite a few SX-424, SX-525, SX-626, SX-727 and SX-636 units over the last six months (refurbishing them to compare to my HK 330B's and pick the one I like best, then sell...
    • dlucy
    • Thread
    • gold tone pioneer pioneer sx silver-face sx sx-424 sx-525 sx-626 sx-636 sx-727
    • Replies: 22
    • Forum: Pioneer Audio
  10. Johnny_Law

    Pioneer SX-636 Intermittent DC Offset How to Diagnose?

    Have an SX-636 on the bench. It was acting like an output transistor had shorted, giving me ~20VDC offset across the right channel at one point. Got it to the bench (a couple days later) and checked all the pins on the Power Amplifier board (AWH-034) and the Power Supply board (AWR-060). The...
  11. A

    Intermittent channel on a Pioneer SX-636

    Boy, I'm glad I found this site! I have recently fired up an ebay-sourced SX-636. One channel partially/mostly cuts out from time to time on both phono and tuner selections. What's funny is that if I play a CD through AUX this generally doesn't happen. And indeed, if I switch from phono to AUX...
  12. heem6

    LED Upgrade (Guide) - Pioneer SX-636 (w/pics)

    Just did my second one this afternoon. The regulars here probably already know how to do this, but maybe this will come in handy for new enthusiasts just getting into this hobby. Apologies if already posted. 1. Pull off all knobs from front of receiver. Remove hex nuts from function and bass...
    • heem6
    • Thread
    • lamps led led lamps led upgrade light bulbs lights sx-636
    • Replies: 16
    • Forum: Pioneer Audio
  13. c.coyle

    Tantalums in SX-636

    I'm working on an all original (as far as I can see) Pioneer SX-636 made in November, 1975. There are 4 tantalum caps on the AWF-014 Equalizer Amp board, and they are in the signal path: C1, C3 are 3.3uf/10v. C13, C14 are 0.47uf/35v. The service manual parts list shows them as electrolytics...
  14. c.coyle

    Pioneer SX-636

    I can get an all original, everything basically working, cosmetically nice Pioneer SX-636 from a private seller. The mean of 2016 completed Ebay sales of working, all original units is 120.00; average is $126.00. These numbers exclude "as-is", "parts only", and restored units. I found 9 such...
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