Question about NAD C320 2-Channel Amplifier

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Nad 310 no power

My nad 310 just plain dead..no light, no sound..suspected the toroidal transformer. what is the output V of the toroidal? because i can't get the same part here, so wanted to get it from other manufacturer...or maybe will use normal type of transformer...thank u..

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The output should be 24v ac. Sounds like you have a busted transformer. Did you check out the resistor in front of the transformer.

You sound like you know what your talking about so I will not bore you with suff like glass fuses and thermal couples.

Good luck, I have had a few items like this over the years. Sometimes it's just best to send them in to the manufacture. I would look for a replacement transformer. 120v ac to 24v ac around 5 amps. Test it out and see if it works... If not, send it in.

Posted on Jan 23, 2009

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1 Answer

Completely dead NAD M15, is there an internal fuse that I can change ?


NAD M15

Problem : Dead


Possible solution : Check for Power Supply

How to Test a Transformer: 7 steps - wikiHow


If these has been done,


• Check amp power supply and low voltage regulators

These includes fuses ( many of them )



Tech Center tells you how to use a multimeter .

• There could be other electronic components but try on them first.


If the torroidal transformer is OK , then it could be a problem on the

Circuit boards.

There could be a shorted components somewhere.

Jul 29, 2012 | Audio Players & Recorders

1 Answer

Dead NAD M15


Hi,
There are fuse inside Nad M15. If you open the top cove then you can see there are 9 fuses lined up i the circuit board on the right side of the transformer. Check these fuses. Also check is there is any fuse behind the Power one of switch. If it is faulty the replace the same.


Before connecting the power after replacing the fuse. check the working voltage marking at the back side. Is it 120v or 220v. If its 120V then be sure that you are using 120V AC line.


If any fuse blows of when you connect the power then you have to consult any nearest service station.


The Voltage rating and Amps rating of the fuse can find marked up on the two metal strips at the two ends. My be laser mark or punching.


Check the link bellow to see the fuses
Check the 12th picture on the link.
NAD M15


AJIN

Jul 29, 2012 | NAD M15 Amplifier

2 Answers

Adcom GFA 5500 'mechanical' hum from amplifier


Possibly. Most amps filter out line hum via low-pass filters. If you can locate a schematic, those would be the caps to check.

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Yamaha P-4500


Hi radek

If it is a toroidal,they have a nasty habit of going shorted turns on the primary. Is it blowing fuses? Let me know

robotek
ex In'gill ;)

Sep 12, 2008 | Yamaha P4500 Power Amplifier 2-Channel

1 Answer

Nad c350 no power at all


check your output stage for bad speakers cable or bare wire of cable touch the body of amp----short circuit speaker cable----bad speaker it self------ bad input cable or defective input device .
disconnect all and check if it is ok---start to connect one by one from input to outputs------if all above failed you must contact service center for help.

Aug 22, 2008 | NAD C320 2-Channel Amplifier

2 Answers

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

2 Answers

Nad amp failure


Check fuses mounted near transformer . If blown check output transistor. Also check transistor transistors on small heat sink . they will cause fuse to blow.

Mar 10, 2008 | NAD C350 2-Channel Amplifier

3 Answers

Distorted sound


This is an automatic high end amp. Make sure you are using 8 ohm speakers. If the connections are correct, also use good quality speaker wire.

If this makes no difference, it seems that it would need to go to the repair shop.

Feb 18, 2008 | Yamaha DSP-A1000 5-Channel Amplifier

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