Question about NAD C320 2-Channel Amplifier

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Nad C320 right channel stops working then comes back again

Hello, I've had the amp for a few months, worked fine until now the right channel stops working after a few minutes. if i turn it off and on again, both channels will work for a little while, but then the right one dies. I tought it was somehting with the cables, checked them and they seem ok. also, the same thing happens if i put headphones into it, so i'm guessing it's a sort of an "input" problem.

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  • 2 more comments 
  • cristi_j Jan 15, 2009

    just noticed, if i turn the ballance fully the right and the volume up all the way, there is sound coming from the right speaker, but it's really low volume.

  • cristi_j Jan 16, 2009

    Did 1,2,3.
    The tape monitor led turned orange a month ago, and remains on, whether you press it or not. I have now connected it via the AUX thinghy (was on CD before), and it keeps on working for the past 8 hours, when yesterday it died after 15 mins. So I’m guessing problem solved for now, can’t believe I didn’t think of this before.
    If i press the tape monitor button while the amp is on, and then try to press the other controls CD, aux etc, they will turn green, but nothing will happen.
    I can do basic soldering, but I'm a bit far away from home and haven't got a soldering iron. I haven’t opened the case yet, and to be honest I’m not that eager to do so, considering it works fine right now.



  • cristi_j Jan 17, 2009

    well, looks like i'm not that lucky.
    it worked perfectly fine yesterday for about 14 hours, today when i turned it on the right channel didn't work at all, regardless of what input I used.


  • Jsonp Feb 02, 2009

    I have the same problem but mine never came back on. when it happend I smelled something burning. Now the right side don't work . you can turn up the vol and barely hear sound. Left side works fine. This is a 60's model stereo receiver. Model #2230. It's been in the family sence it was bought new. Pleeease help me fix it! I do know my way around a solder gun. Thank you in advance.........

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  • 4,234 Answers

This sounds like the "pre-amp" section is cutting out or there is some interruption in the signal path. A few things to try:

1) With the unit off, try "working" the volume,balance and tone controls. This means, turn them up and down a number of times to clear any debris that may be in the controls themselves.

2) Work the input selector switch the same way if it is a rotary switch.

3) Try turning on/off the tape monitor switch a few times.

4) Keep track of whether this problem is sensitive to heat. Does teh channel shut down more quickly once the unit has been on for a while?

Lastly, if you can solder, look for any solder joint that appears grainy or has rings and resolder it.

Update this with your results and we'll continue on...

Thanks,
Dan

Posted on Jan 16, 2009

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