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Onkyo TX SR701 in protection mode

Discussion in 'Audio' started by KWXYZ, Jan 25, 2021.

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  1. KWXYZ


    Jan 25, 2021
    Hi All,

    So the Zap bug got me ( Stereo) last week.

    Without going into (why?) details.

    The Banana plugs touched a AV back stand, metal frame column ( now shielded!)

    Stereo was on while moving it and something popped. No smoke just shut down?

    In the old days cross 2 wired fuse pop change good to go, Now?

    It’s older unit got it used, owner hardly used it. What to look for and worth getting fixed?

    Went thru reset procedure’s and no go.

    Fuses check ok
    Power Transistor is not reading dead.
  2. shrtrnd


    Jan 15, 2010
    Don't know your unit, but have had 2 friends with Onkyo amps that did similar issues. Darned things have virtually no good protection circuitry for this problem. Both of the ones I fixed had blown small capacitors in the output circuits. I'd start looking there, and if you can't find the problem see if you can find a schematic.
    KWXYZ likes this.
  3. KWXYZ


    Jan 25, 2021
    Thanks for the reply, I'm going to track one down this weekend.
  4. KWXYZ


    Jan 25, 2021
    Update, for anyone who may have a similar problem?

    This happened back in Jan and I"m happy to report it's working again!

    Left unplugged for 2 wks in Jan still unresponsive,
    Last week, getting ready to donate, It worked perfectly again?
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