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NAD 7400 relay clicks and sound goes on and off. Hitting the receiver restores sound intermittantly. Did open the recveiver and soldered some bad connections on the main board, but suspect there may be more. Looks like heat has loosened the factory solding.

Posted by Anonymous on


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Posted on Jan 02, 2017

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SOURCE: RX-V995 Won't Start - Found Possible Fix But Need Parts


Start by checking the fuse, take the cover off the reciever and look for a small glass fuse attached to the board. If it's blown replace it.

Posted on Sep 06, 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

  • 1 Answer


The clicking is the sound of a bad relay. A relay is an electrical switch that opens and closes under the control of another electrical circuit. There is no user solution for this. You'll have to take it to an electronics repair shop (~$150) or dump the whole unit.

Posted on Dec 19, 2008

larry james
  • 287 Answers

SOURCE: Got a Sony str-DE845 intermittently the front

I have seen the audio relays cut out on these. Try tapping right on them lightly to isolate the problem . Andrews Electronics in santa clara will supply you the parts. Larry's electronics

Posted on Apr 25, 2010

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1 Answer

My old NAD C350 AMP diode turns green when the amp is switched on, says one click, but the second click sound does not appear, like in the good old days. What to do?

Your receiver has a condition known as DC Offset, meaning you have a damaged amplifier. That second relay click, that you don't hear now, is the speaker protection relay not closing, due to the damage.

If you're interested in having your receiver repaired, please visit my website at You may contact me there. Thank you.

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How do you fix relays?

I would check the solder connections on the bottom. Relays are notorious for breaking the solder connections thus becoming intermittent

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There is a relay on the power supply circuit board that might be faulty or has bad solder connections. If this relay does not work, power is not applied and everything is "dead". I had to re-solder the speaker relays on my STR-DE675 because they had cracked solder joints which made them work intermittently. It's possible that the power relay is what is causing your problems. If it has bad solder joints it might click, but power might not be able to pass trough the joints.

Does it still click when you turn it on or did it only do this once?

Dec 01, 2010 | Sony STR-DE675 Receiver

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Oven won't heat. Replaced the element, but still won't heat.

Which element..?? there are 3... Check for voltage to the bake element.!!! (2 legs of 110-120 VAC) Does your broil function work.? Convection.? or did "bake" flake out.? the relay boards are not very robust in these ovens, and manufactured as cheaply as possible. The board mounted relays develop cracks in their soldered connection to the PCB over time, resulting in intermittent opens for some of the relays. Spend some time narrowing down the relay controlling the circuit that is dropping out, and re-solder the node. Sometimes just hitting it with a soldering pencil will be enough to restore the connection, but I would recommend adding a little silver solder to the puddle. It will help keep that connection from opening again.! Heck, while you're at it, re-solder all the board side relay nodes to prevent future issues.. or just replace the $165 board.. :)

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The clicking is the sound of a bad relay. A relay is an electrical switch that opens and closes under the control of another electrical circuit. There is no user solution for this. You'll have to take it to an electronics repair shop (~$150) or dump the whole unit.

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Sound turns on and off intermittantly through unit

You may have a bad protection relay or solder joint at the relay mount position. This relay prevents power supply "thumps" when the unit is first turned on, and also shuts the amp down when there is an overload problem....accordianman

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NAD C272 Amplifier: Intermittent left channel

My solution was actually indeed the output protection relay. What I did was to open up the relay and use contact cleaner and a very fine abrasive to clean the contact surfaces of the relay. After that, the problem was gone!

The way to diagnose this for me was to run the amplifier open until the problem recurred and to simply tap the relay's box. The sound came on immediately, and I was convinced.

Apr 03, 2008 | NAD C272 Amplifier

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Center speaker

mine is doing the same thing, you can hear a click sound and the channel will die. I think it is a relay or a shunt that trips when something goes wrong with that amp. I dont think it is worth repairing as there are some nice receivers out there for cheap. Maybe just a cold solder joint somewhere? Anyone know where and Ill dive in and resolder and post the results.

Feb 24, 2008 | Sony STR-DE545 Receiver

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Nad s200

It is most probably a dirty speaker protection relay. gently tap the relay(the one that engages shortly after turning the amp on) when the fault is occurring and see audio returns. This should ascertain the problem. Replace it if it is a sealed type, or if it has a "lid" you can get off, burnish the contacts with a white business card, and give it a spray with contact cleaner/lubricant. Good luck and a "fixYa" rating would be great for my profile :)

Feb 06, 2008 | NAD C370 2-Channel Amplifier

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Nad 214 amp

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

Jan 03, 2008 | NAD 712

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