Question about NAD C272 Amplifier

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Nad c272 protection mode - NAD C272 Amplifier

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Posted on Jan 02, 2017

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dunnbiker
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SOURCE: cant get no sound from my Nad C162 pre amp

First prove if it's a preamp problem or an amp problem. Plug one of your sources directly into the amp for a moment and play something VERY LOW in volume. If the amp is ok it will play VERY LOUDLY.

If so, look at the preamp and make sure it's not muted or a tape is selected.

Posted on Apr 03, 2011

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If your NAD amplifier is in protect mode with no speakers connected, it will be necessary to open it up and check for internal component failure.

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That could indeed be the issue, but you must check your speakers, wiring, and also the oupt stages for problems. Maybe the prtection circuits are actually doing their job. lol

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Geno

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yes........you may have to replace the stk output amp ic or the discrete transistors for the channel affected.....good success, regards, Meder's tv service

Aug 15, 2012 | NAD C272 Amplifier

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Cant get no sound from my Nad C162 pre amp connected to my C272 power amp , and ideas please?


First prove if it's a preamp problem or an amp problem. Plug one of your sources directly into the amp for a moment and play something VERY LOW in volume. If the amp is ok it will play VERY LOUDLY.

If so, look at the preamp and make sure it's not muted or a tape is selected.

Apr 03, 2011 | NAD C162 Amplifier

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NAD C272 AMP has little volume and sound is muddy and distorted.


Normaly this is what cause little volum and distortion. Check first if you got +68/-68V on amp module left and right Often the -68V is missing. This is caused by faulty transistor Q712 (2SA872) in +68/-68V power supply.

Feb 27, 2010 | NAD C272 Amplifier

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C355Bee and C162 Problems


Get your money back. I had similar problems with new NAD purchases a year or so back. NAD has had all sorts of repair issues.
I'll never buy anything from them again.

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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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