Question about NAD 712

1 Answer

NAD 7140 The unit powers up but even with the volume turned to the max position you here the music very faintly. All three fuses are ok. I hooked the speakers to both A & B ports but get the same results. Also does not matter if it is in the CD or Tuner position any ideas. Please Help.

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 97 Answers
Re: NAD 7140

Amplifier is about shot, need to replace IC pack or transistors (whichever it has). Could, remotely, be the speaker lines are installed incorrectly?out of phase. + to +, - to - from amp to speakers. Some amps will protect themselves when this condition occurs till fixed.

Posted on Aug 02, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Nad 7140 fm low frequency hum

This is probably a 60 cycle hum and the problem is more likely confined to the am/fm board, there is a bad ground due to poor solder joints, broken ground wire, an open capacitor, this may not be easy to find, but it is a start.

Apr 22, 2012 | NAD 7140 Stereo Receiver With Phono Input

1 Answer

My onkyo tx-8222 suddenly stopped amplifying on both speakers and headphones. I can hear music faintly with the volume at max (just the pre-amp?). Time for a new amp?

Never use maximum volume for troubleshooting. The errant switch or control that you eventually find and flip will suddenly release the amp's full power and you'll destroy your speakers. If a signal isn't audible at 1/2 volume it's probably not there.

Look for a misplaced Mute or Tape Monitor control or Multichannel Analog Input selected.

There is a good chance that a common control may have developed a high-resistance or 'dead' spot through idleness and is causing your symptom. Turn the POWER OFF and operate every control throughout its range a number of times, especially rarely-used ones like Tape Monitors and the Mute control.

Turn the volume to something reasonable and see if that helped.

Feb 21, 2011 | Onkyo TX-8222 Receiver

1 Answer

NAD 7020e sudden volume drops, sudden distortion- intemittently

OK. I dont know the answer to your prob, but to let you konw that youre not in this alone, my amp used to occasionly lose considerable volume in one channel. this could be remedied by cracking the volume up to max for a half second or so. (Not a great solution!!) It has finally given up the ghost ...I have lost one channel and the doctor says it wont come back. Not only this but they claim that spares ceased to be sold back in the 90's. having said this I have enjoyed this amp for almost 20 years. I think its time to put it to pasture.


Apr 12, 2010 | NAD Audio & Video Receivers

1 Answer

How do you connect power amp to av

I presume you want to use it to drive speakers from a source controlled by the Denon??? Probably the Front channels? We'll assume that's it...

Run RCA cables from the Pre Out jacks to the NAD's L and R inputs. If it has a volume control, set the NAD to its maximum volume (for consistency *), run through the setup for levels and you're done.

* If it doesn't have a volume control it's already set to max. That's normal for power amps. Your receiver / preamp controls the volume fed to them.

BTW: If you're thinking of using two sets of Front channel speakers simultaneously you'll have to choose a level on the NAD that will match up with the others in volume.

Jan 22, 2010 | Denon AVR-3805 Receiver

1 Answer

My speakers shut fown briefly even at small volumes. Help!?!

are the hooked up correctly positive and negative whats the ohm load of the speakers and amp could be a short in your speaker cables
could be many different problems

Jul 02, 2009 | Sherwood RX-4105 Receiver

2 Answers

NAD 7140

Hi okapi6

Use a 3.5mm stereo jack to RCA connector lead.
370a7a3.jpg Connect this to the AUX input on the back of the 7140, and away you go. Get the lead as an accessory from just about any electronics hobby store.

Dec 07, 2008 | NAD 712

1 Answer

NAD 7140

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.

Nov 22, 2008 | NAD 712

1 Answer

Would like to know year of manufacture for Nad 7140 stereo receiver

Hi - You can download the manual by clicking the link underlined in blue below:

Nad 7140


Please take a moment to rate this solution & let us know if the information given was useful to you - Good Luck!


Sep 09, 2008 | NAD Audio & Video Receivers

1 Answer

Receiver (tuner) signal fade-out ---heat related

The main problem with the 7140 is that there are at least 3 versions that I am aware of. The varient is based upon the serial number. Can you post that here. I will look up the info for you. I have access to some NAD stuff. Post the part designations as well (Qxx) and I'll at least get you the exact part numbers etc.

Mar 23, 2008 | Audio & Video Receivers

1 Answer

Nad 712 output issues - Mute flashing

The only thing I can tell you for sure is that the mute indicator always flashes (very dimly) when the receiver is off.  I have no idea why, but mine has always done this.

Jan 23, 2007 | NAD 712

Not finding what you are looking for?
NAD 712 Logo

Related Topics:

472 people viewed this question

Ask a Question

Usually answered in minutes!

Top NAD Audio & Video Receivers Experts


Level 2 Expert

180 Answers

Al Kizina

Level 2 Expert

168 Answers

Brad Brown

Level 3 Expert

13317 Answers

Are you a NAD Audio and Video Receiver Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides