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stk-0050

  1. A

    Pioneer SX-780 Goes Nuts for a Second

    I have an SX-780 that plays fine... mostly. After around 20 minutes of use, the volume of the right channel will instantly increase (by a lot) with treble-y distortion... for ONE SECOND. Then, back to normal. 1. It has been serviced and had STK-0050s replaced last year. 2. It went back to the...
  2. A

    Pioneer SX-780 Goes Nuts for a Second

    I have an SX-780 that plays fine... mostly. After around 20 minutes of use, the volume of the right channel will instantly increase (by a lot) with treble-y distortion... for ONE SECOND. Then, back to normal. 1. It has been serviced and had STK-0050s replaced last year. 2. It went back to the...
    • Artstronauts
    • Thread
    • interference pioneer stk-0050 sx-780 sx-780 issue sx-780 volume
    • Replies: 16
    • Forum: Solid State
  3. M

    Balance between DC offset and input voltage levels on replacement STK-0050s

    So, I have an SX-780, which sounded terrific until the left side speaker bank developed distortion. Traced it to a failed STK, and decided to replace both STK in the short term with a replacements bought online. I WILL be purchasing, assembling and installing the much-better replacement...
  4. Oleg LED

    STK-0050 in Pioneer SX-780

    Just bought this Pioneer SX-780 and wondering if those STK-0050 modules are original or not? Is it possible to identify?
  5. lebrun53

    Pioneer SX-780 STK-0050 voltages

    Hello all, I have a SX-780 with voltages on the STK-0050 pins that are slightly high. (This based on other posts here) Electrolytics on the amp/power board have been changed Transistors on the amp section all changed per recommendations on other posts here. Transistors in power supply circuit...
  6. Kingbleu

    Pioneer SX-780 need help signal tracing. Powers on no sound. Darlington packs are good.

    I have a Pioneer SX-780 that powers up but produces no sound and no relay click. The STK's (Darlington power packs) are good. I would like some help tracing the signal. I have test equipment that I have picked up over the years. Mostly at garage sales or Craigslist. I have two SX-780's one...
    • Kingbleu
    • Thread
    • no power pioneer sx-780 signal trace stk-0050 sx-780
    • Replies: 78
    • Forum: Pioneer Audio
  7. Stink Bear

    Is there any "better" new type STK-0050?

    I have a unit I'm thinking about putting some new IC power packs in temporarily to check it out and see if I want to do the discreet component mod to it. Has anyone found that there are better, or least crappy new STK-0050's? Thanks, Brett
  8. C

    SX-780 - Counterfeit Darlingtons?

    I have a Pioneer SX-780 that was blowing a main fuse (#4 - 4A I believe). I removed the power wires going to the Darlington outputs, replaced the fuse and the unit powered on and lit up AND the speaker relay clicks. Great, right? So, I went to eBay and bought some replacement STK-0050's ($15...
  9. bradfro

    STK0050 build with descret components, Help

    I've started this project with a schematic, parts and a aluminum plate. The circuit board was a step that I thought I'd skip and just do point to point wiring. Mostly, I just wanted to see if I could do this. Here is my creation... I've connected it to a JVC JA-S44 integrated amp which uses...
    • bradfro
    • Thread
    • stk-0050
    • Replies: 6
    • Forum: DIY
  10. R

    STK-0050 replacement for SX-780 and others

    Their has been a bit of interest for a replacement of what was the original Sanyo STK-0050 module used in a SX-780 receiver. Many question the integrity of what can be obtained these days as STK-0050 modules. I decided instead of sending these files to individuals or trying to make a buck from...
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