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sx-680

  1. RogerALB

    A Question About A Front Panel Meter Problem: Pioneer SX-680

    I have a thread elsewhere in this section about my SX-680 adventures, but this is somewhat more specific, so I figured that a new thread would be a OK. Here's the quick version of the issue: When I turn on the SX-680 with the speakers connected but OFF the meters on the front panel ocellate a...
    • RogerALB
    • Thread
    • bad readings front panel meters meters pioneer sx-680
    • Replies: 3
    • Forum: Pioneer Audio
  2. Ray66

    Pioneer SX-680 Fuses

    I have two SX-680s on my bench. The first one I got had 1 4A fuse on the main PCB near the rear panel AC outlets, and 5 fuses (left to right 1.5A, 1A, 1A, 5A, 5A) on a separate PCB labelled GWX-187 which was attached to the heatsink. The second SX-680 also has the 4A fuse on the main PCB, and...
  3. NickDeO

    SX-680 Restoration Troubles

    Hello, AK! Recently, I picked up a Pioneer SX-680 for $30. The guy I bought it from claimed that no sound came out due to a cracked PCB. Nice guy he was, he was even willing to open the thing up in his kitchen to show me where it was. I've since glued the cracked board and repaired the...
    • NickDeO
    • Thread
    • buzzing hum humming pioneer repair short shorted sx-680 troubleshooting
    • Replies: 80
    • Forum: Pioneer Audio
  4. Krosya

    Pioneer SX-680 no tuner - help!

    Hi All, I got this nice little receiver in a trade and everything works fine, but the tuner. No AM or FM. I did some digging online and there was a thread or two here that points to something called Q401. I am not very savvy when it comes to these things internally, but if someone could point...
    • Krosya
    • Thread
    • pioneer q401 sx-680 tuner
    • Replies: 15
    • Forum: Solid State
  5. pio_sx_680

    My pioneer SX-680 makes only faint sound

    so I just got saved this Pioneer SX-680 from getting pitched at the dump. the guy who had it was the first and only owner. i brought it home and put a 4ohm RCA speaker on it and a variety of other speakers (up to 4 ohm) and none of them worked in any of the different outputs. everything seems to...
    • pio_sx_680
    • Thread
    • broken diy help pioneer reciever retro stereo sx-680 trouble shooting
    • Replies: 23
    • Forum: DIY
  6. M

    Reviving dead SX-680

    I bought this dead (no sound for both channels) SX-680 receiver for cheap to revive it. The first order of business is to blow away all the dirt, then clean all the knobs, switches and the connections at the back with electronic contact cleaner. Follow the service manual, I then replaced the...
  7. R

    SX-680 no audio out

    I picked up a SX-680 off of craigslist cheap. It lights up, tunes ok, but no audio out. .85v dc at the speaker terminals. All fuses look ok. What should I check next? Appreciate any advice!
  8. streckfu

    Whelp....screwed the pooch and torched an output on SX-680.

    Backstory: As described in my bookshelf speaker thread, I picked up the Overnight Sensation speaker kit to build and put them together. I tested the crossovers with the drivers out of the enclosures after building them with a small Kinter amp I have. They seemed to work fine so I put them in the...
    • streckfu
    • Thread
    • left output no output shorted output stk0039 sx-680
    • Replies: 12
    • Forum: Pioneer Audio
  9. Tubelicious

    I just got bit by the vintage receiver bug and impulsively bought a SX-680. Now what do I do?

    Hello All -- I'm not exactly new to audio Karma but I mostly lurk so apologies in advance. I have a decent hi-end system but recently I've got the bug of putting together a "side system" of mostly vintage components. Did a little research and kept seeing many pioneer, marantz, Samsui and...
  10. RFmaster

    Pioneer SX-680 recap

    After doing a recap on a unit do you ever wonder what is removed??? Wonder no more - here is a family portrait of a typical SX-680 recap. In addition to changing electrolytic caps it is highly advisable to R&R noise prone 2SA725, 726 and 2SC1919 transistors in the FM and phono sections. In the...
  11. Johnny_Law

    SX-680 humming changes with STK pack / treble and bass adjustment

    Here's a doozy. I received the unit with no lights working and the vu gauges pegged at 1 watt with the power on. I found that R401 had been replaced with a 1/4 watt resistor and was blown, so in went a 1/2 watt 33ohm resistor. I also had a spare pair of STKs which went in. I also re-soldered...
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