Question about NAD Audio Players & Recorders

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I have a nad 3130 amplifier which has been in storage for sometime. I've plugged it in and I have no power to the amp.

Ive changed the plug fuse and checked the 4 fuses inside and all seems fine. Is there anything else I can check.

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If the fuses are good....do this.....
1...unplug the amp from the wall AND KEEP IT UNPLUGGED !!!
2 Turn the power switch on ( again , the amp is UNPLUGGED from the wall )
3 with an ohm meter or a multimeter set on ohms., measure the ohms across the ac cord that plugs into the wall....in other words...take one meter lead and touch it to only one " blade" that plugs into the wall and keep it touching the " blade".....while you are holding it there, touch the other meter lead to the other " blade " that plugs into the wall.....you should get a very low ohm reading ( 2-50 ohms )......if it is over that number, your transformer or your switch is open ( toast ). hopefully it is the switch as transformers are un-available......good luck, be safe, and if you arent sure....ask before doing something silly.....Rob

Posted on May 30, 2015

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Posted on Jan 02, 2017

  • 4 Answers

SOURCE: NAD 370

Hi There is no circuit breakers inside. close to front panel on a left side under plastic cover is fuse (AGC type) . Before you change fuse look at four filter capacitors in the middle of unit!!! (close to power transformer on pcb) If they are white do not change the fuse and get unit to good service center( it must be someone who knows what they doing!!!) If the caps are different color (black ,purple) you can try to change fuse. Once again if capacitors are white do not use unit-fire hazard!!!! I'm long time service guy for NAD so trust me on this one Dariusz  dariusz70@verizon.net

Posted on Feb 13, 2008

Grubhead
  • 5011 Answers

SOURCE: my nad amp wont turn on - i've checked plug fuse so it must be something inside - was told it might not be worth fixing but i wuld like toknow what it is so i can at least decide. it's only 2 years ol

Yes it could be the internal fuse. If your lucky it might have just failed on it's own!

Posted on Jun 02, 2009

Grubhead
  • 5011 Answers

SOURCE: Marantz PM7200 Amplifier, wont switch on, no power

You can check the fuse with a battery and a bulb. Take the fuse out and use it to make a circuit with some wire, the battery and bulb. If the bulb doesn't light it has gone.
Apart from that other things to check are the power switch, to see if it works and the transformer.
It might be worth buying a cheap Ohm meter, if you haven't got one. You can check most of the parts in the power supply with it. By the way if the fuse has blown, buy a few as you might find it could blow again when you try it again. If it does you are looking at a device (such as a transistor) that as shorted and acting like it was a piece of wire. Which is easily found with an Ohm Meter!

Posted on Sep 28, 2010

Grubhead
  • 5011 Answers

SOURCE: NAD Electronics 7020e 4A fuse keeps blowing on power up

Well you are on the right course. I suspect you think the problem is in the power supply and it's probably not. I think that what's gone is either a transistor (or more) or an IC amp - if it uses one - on the main power amp stage. Look at the devices on the heat sink. I think that's where you will find your shorted device.

Posted on Dec 17, 2012

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