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marantz 250

  1. R

    Marantz 250 power board BWH resistor?

    Greetings AK friends, First time posting here, but longtime admirer of this site. I do have a side biz in vintage stereo repairs, and many years under my belt. And while constant learning is part of the process, sometimes one comes across a real head scratcher. I am restoring a Marantz model...
  2. forceof1

    Now What?? My 250 is down, again.

    I had my 250 restored only 5 years ago. The left channel began would drop in and out in the worst times. I recently noticed sound from my iPad coming through from the Aux when I'm in phono. Two nights ago the left channel volume was very slight in comparison to the right. Now I have virtually no...
  3. sstudley

    Marantz 250 Semi-Ground & a Question of Stability

    Posting for my friend, and for general edification: “The Marantz 250(M) amplifier inputs have a voltage, appearing on post #2, whose purpose is not entirely clear to me, as an amateur electronics enthusiast of modest technical knowledge. I’m hoping someone with real EE chops can clarify the...
  4. goldswimmerb

    Yet another butchered 250

    Alright, so some of you guys probably remember my last thread on the 250M that was toasted, that one went smoothly and was a great learning experience all round. Anyway, I have a new challenger now... A Marantz 250 that's been very much molested. Right now I am trying to assess the damages, it...
  5. forceof1

    I'm Afraid I've Done a Bad Thing.

    Ugh. Just got a Marantz 250. Worked great until I tried to run 2 right and left in series. Ohms are fine. Fired it up, came on for a split second and blew the fuse. I had 1 wire in the wrong place. From there I checked continuity to make sure all was good, another fuse. Disconnected all...
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