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sx-838

  1. tutor_turtle

    SX-838 FM radio troubleshooting.

    I have a SX-828 on the bench with a strange problem with the FM radio. It picks up weak stations good enough, when I tune to a strong station, the signal strength meter pulses and bangs against the max stop. The sound is distorted in sync with the pulsation. I get a very weak stereo light when...
  2. T

    Pioneer SX-838 - how important is a recap?

    Hi everyone. I bought a Pioneer SX-838 a couple of years ago. I did check a few things when I got it home. It had broken volume knob and sounded terrible. I put it on the shelf and forgot about it. About two weeks ago, I pulled it out and dug in. I replaced the broken volume knob/pot and...
  3. S

    Good equalizer compliment to SX-838

    Hello all, Looking for some recommendations on models of Pioneer equalizers to pair with my SX-838. I know there is the SG-9500, but its pricey from what I see and doesnt look to be as wide as the SX-838. Its a really nice eq, but not sure I can afford one! Any others recommended that would...
  4. bzenic

    SX-838 No Output From Main Amp, Pre-Out is OK

    Here is my current situation: I don't have any output from main amp. The tuner works fine and there is a good signal from Pre-Out RCA, I've tested that by connecting Pre-Out to another receiver AUX input. There is no any output on Phones jack as well. The voltages on the protection board look...
  5. G

    Another channel drop out question, headphones fine

    My SX-838 has had a problem recently where the right channel drops out and/or sounds static-y or buzzy, out if the volume is relatively low. If I increase the volume the channel will come back. Last year the effect was present in both speaker and headphones. Using Deoxit on the volume and...
  6. S

    Subwoofer Options - SX-838

    I have ok bookshelf speakers with my SX-838 (due to available space). They are JBL 2500's. I wanted to know if there were any options to add a subwoofer, powered or non-powered, to the system? I'm not sure where one would be connected in the back. Your advice and assistance is greatly...
  7. Childof60

    Pioneer SX-838 Tuner Issues

    I picked up a nice SX-838 a few weeks ago in overall good condition. I have done the normal things including power supply, protection board, and power amp, and tone control recap and known transistor issue replacement - which has turned out well. So, moving on to the tuner it is a different...
  8. Mark Blom

    Pioneer SX-838 No FM reception ?

    I have been going through many threads looking for information on this. I found one but it never said what the fix was. I have a Pioneer SX-838 that had a few issues I worked most of them out except one. The FM has static with the FM muting off but I get nothing at all in the way of stations...
  9. lshj2015

    Pioneer SX-750 vs SX-838, sound very different, need restoration?

    I bought a Pioneer SX-750 as it was highly recommended here with typical sound of the 50 series receiver. Recently I bought another Pioneer SX-838 mainly because of good price. None of these two receivers have been restored or serviced, I believe both have the original electrical components...
  10. G

    Tracking low level hiss in sx-838, audio probe sensitivity?

    I finally finished my sa-7100 with help from folks here on the forums and was able to revisit an admittedly small, but annoying, problem with my sx-838. I first posted regarding the issue a couple of years ago...
  11. nickhead

    SX-838 Replacement caps

    What are you all using for these caps? They've been discontinued: AWH-031-A: C1: 1uF 25v CSSA: 667-ECQ-V1H105JL3 1uF 50v AWH-031-A: C2: 1uF 25v CSSA: 667-ECQ-V1H105JL3 1uF 50v AWH-031-A: C3: .47uF 25v CSSA: 667-ECQ-V1H474JL3 .47uF 50v AWH-031-A: C4: .47uF 25v CSSA: 667-ECQ-V1H474JL3 .47uF...
  12. nickhead

    SX-838 won't come out of protect

    I'm "new" to the forums, although I've been a lurker for about a decade. I've absorbed a great deal of information from the threads here. I now have a problem I can't figure out. SX-838, relay not engaging. I'm not an electronics expert, but I have more than a basic understanding. I was...
  13. QSilver

    Reservoir capacitor upgrade...

    I'm going through an SX-838 I got recently in great condition. I've gone through it all and I'm planning on migrate some of the regulators to heatsinks as theres plenty of room in the case. I was wondering about changing the main filter capacitors for the power amp and I just so happen to have...
    • QSilver
    • Thread
    • capacitors pioneer power supply sa-9100 sx-838
    • Replies: 43
    • Forum: DIY
  14. G

    SX-838, odd whooshing sound. Not present when bypass pre-amp

    Hello Everyone, I've been off the forums for sometime, and decided to go back and revisit my old SX-838 which I thought was mostly fixed for a bit (other than the FM), but started up with new symptoms. It's hard to describe, but a few minutes after turning the unit on and playing music...
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