NAD 3150 Amp Channel Dropout

eyendall · 1st November 2007, 09:04 PM

I am running a NAD 3150 integrated amplifier bought new many years ago. My problem is this: the right channel regularly drops out, i.e. goes silent. I can restore the sound by turning the channel knob fully to the right then turning the volume up full for a split second. The sound is restored but invariably drops later. I am not into electronics so am unable to test anything inside the case myself. Is this problem due to something simple like dirty controls? if so, how do I take the knobs off to get at the contacts? How should I start? Any suggestions and advice much appreciated.

eyendall · 9th November 2007, 08:29 PM

Anyone?

Bigred · 10th November 2007, 07:37 AM

The knobs are usually held on by a small screw but this won't do you much good. In order to clean the potentiometers and switches you need to get at them from inside. Use some Deoxit to clean the pots and switches and follow up with faderlube on the potentiometers. Work all the switches and turn the pots through the full range numerous times.

adventfan · 10th November 2007, 05:48 PM

If cleaning the pots doesn't work then you might have some bad soder joints.

eyendall · 10th November 2007, 11:23 PM

Thanks. Now I just have to find Deoxit in Canada at a reasonable price.

eyendall · 17th November 2007, 11:16 PM

I got some Deoxit from PartsConnexion in Canada. vswitzer@partsconnexion.com
Good price, excellent, fast service. It seems to have done the trick. I may be fooling myself but the music sounds much clearer and louder.

1st November 2007, 09:04 PM	#1
eyendall diyAudio Member Join Date: Oct 2007	NAD 3150 Amp Channel Dropout I am running a NAD 3150 integrated amplifier bought new many years ago. My problem is this: the right channel regularly drops out, i.e. goes silent. I can restore the sound by turning the channel knob fully to the right then turning the volume up full for a split second. The sound is restored but invariably drops later. I am not into electronics so am unable to test anything inside the case myself. Is this problem due to something simple like dirty controls? if so, how do I take the knobs off to get at the contacts? How should I start? Any suggestions and advice much appreciated.

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9th November 2007, 08:29 PM	#2
eyendall diyAudio Member Join Date: Oct 2007	Anyone?

10th November 2007, 07:37 AM	#3
Bigred diyAudio Member Join Date: Jul 2007	The knobs are usually held on by a small screw but this won't do you much good. In order to clean the potentiometers and switches you need to get at them from inside. Use some Deoxit to clean the pots and switches and follow up with faderlube on the potentiometers. Work all the switches and turn the pots through the full range numerous times.

10th November 2007, 05:48 PM	#4
adventfan diyAudio Member Join Date: Aug 2007	If cleaning the pots doesn't work then you might have some bad soder joints.

10th November 2007, 11:23 PM	#5
eyendall diyAudio Member Join Date: Oct 2007	Thanks. Now I just have to find Deoxit in Canada at a reasonable price.

17th November 2007, 11:16 PM	#6
eyendall diyAudio Member Join Date: Oct 2007	I got some Deoxit from PartsConnexion in Canada. vswitzer@partsconnexion.com Good price, excellent, fast service. It seems to have done the trick. I may be fooling myself but the music sounds much clearer and louder.

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