Question about NAD C320 2-Channel Amplifier

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Amp wont switch off of stand-by

My NAD 320B Amp powers up with red standby light which never goes green. Anyone had this before?

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  • deonlot May 08, 2008

    Hi - exactly the same. Opened up and found 1 of the large capacitors had loose joints but after resoldering, problem still there. After about 1 - 2 hrs it does come on but then only works on a low level. Clips and distorts. Beautiful amp ....when it used to work.

  • gummi321 Dec 12, 2008

    i have the same problem what outputs are we talking? can i fix this myself ? know lil about electronics . just if you could tell me what i am looking for thanks GS

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Both units have a problem with the output section. In case 1, the outputs are likely to be shorted. In case 2, the outputs are open. The low level and distortion come from you driving the speakers with the driver section of the amp. Both units will need to see a service provider.
Dan

Posted on May 19, 2008

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The voltages are wrong. You should see (0.0, +/-0.6, and B+/B-) on the 3 pins. The driver section has a problem. Check the driver stage for shorted transistors or open resistors.
Dan

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