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No output 3020b amp. on power up the power led flickers and rasping noise from speakers. sometimes the amp will cut in and the led becomes steady but after a while it reverts back to the described fault. I have searched for dry joints etc. but none found. r630 & r904 look a little cooked but meter out ok. Any advise would be welcolm Regards Steve UK

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  • steve558 May 13, 2009

    Ok Problem solved Fault turned out to be the on/off switch. A large dose of switch cleaner has almost cured it but a replacement switch will make a job of it. Thanks farr64 for your advise as I also found a dry joint on one of the smoothing caps and this also has been sorted.
    Great site keep up the good work

  • colin
    colin May 11, 2010

    check the small capacitors in the power supply these tend to leak or dry up .tap around the power supply to check for dry joints. have you tried checking the web to see if anyone else has had this problem?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

dsom
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SOURCE: TX-DS575 reverts back to standby mode when turned on

You can find it out by yourself. I have the same device; therefore, I know that this device has a "test" function. Just unplug rear (surround) speakers at first, then test the rest of the speakers if the amp lets you do it. Hook up one of the rear speakers you regularly use to rear left or to rear right in order to test each rear channel. If one of them turns off the amp, you'll be able to understand which side feeding resistor does not work. However, if the amp goes to standby mode as soon as you hook up one of those speakers, you can alternatively invert the relevant rear speaker's input ports for a while. (+ to -, - to +) Don't forget that you have to hook up the other rear likewise. This will allow you to cheat your amp for a while, and let you test your channels without taking care of ohms.

Posted on Apr 20, 2007

  • 4 Answers

SOURCE: nad 214 amp

problem is- intermittent speaker relay. You can cleaned contacts or better upgrade relay to better one (sealed)  Dariusz

Posted on Feb 13, 2008

  • 319 Answers

SOURCE: power fault

You probably have shorted rectifiers and/or transistor(s) on standby board. Trouble-shoot rect bridge and cap. Feel stand by circuit transformer for abnormal heat, sure sign

Posted on May 01, 2008

  • 15 Answers

SOURCE: Speakers Cutting Out

I posted this solution on FixYa to help someone who had the same problem, or at least a similar problem. If you remove the slotted panel underneath the bottom of the receiver, you can gain access to the underside of the main circuit board. There are 3 relay units there, they are blue boxes that can be seen if you shine a torch down through the top. I found the solder joints on these relays looked as though they had broken away from the board, there appeared to be a dark ring around the pin of the relay. I re-soldered 4 of these connections, and, so far, that seems to have done the trick. Time will tell. These relay units connect and disconnect the speakers. There is one other relay that is mounted on a seperate board above the main board, that I can't access easily. If this one is also faulty, I will be un-able to fix it, as it would involve removing the entire guts of the receiver. If any of your technical team disagree with my remedy, or can offer any other solution, that would be appreciated. Thanks.

Posted on Sep 15, 2008

  • 30 Answers

SOURCE: no sound output

Known problem w/Onkyo. Resolder Q710 transistor on DSP board.
Onkyo is aware of this problem.

Posted on Apr 19, 2009

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