Question about Audio Players & Recorders
I have an NAD 7250 PE Receiver It's about 19 years old.
As I turn the volume knob I hear a static noise. It use to go away as the amp warmed up but it now continues even after an hour. The noise comes and goes more coming than going at this point.
I tried a spray into the volume knob area (pulled the knobs off) no effect.
I have opened the outside case used air to clean the inside. Yes lots of dust etc. I don't see any easy way to get into the volume control unit.
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Posted on Jan 02, 2017
SOURCE: klh model 52 audio receiver
Open the receiver and locate the potentiometer for the volume. There should be small openings in which you can spray electrical contact cleaner. The spray can be found at any electronic supply store (Radio Shack). Make sure the product says no or zero residue. I use a product called "Electrosolve". After spraying, immediately rotate the pot back and forth a few times. You may need to repeat this process two or three times. You might as well hit the other controls while you're at it. If several attempts don't eliminate the problem, the pot will need to be replaced.
Posted on Oct 11, 2007
SOURCE: Speaker noise
The contacts on the volume control (potentiometer) get oxidized over time on any analog rotary volume control. With the power off, crank the volume control back and forth real fast for a minute or two, this will do the most cleaning of the contacts that you can do without access to the insides. Ultimately you'll probably need to sprary some tuner wash/tuner cleaner or other electronic parts cleaner in the know (with the electricity disconnected) and then work the knob back and forth. Tuner wash bottles are available at electronic specialty stores or radio shack and usually have a long extension tube (like what comes with WD40). You might be surprised where you can reach with the extension tube.
Posted on Sep 01, 2007
It sounds like your volume control pot has dust in it.You need to remove your cover from the receiver,spray pure denatured alcohol in the small openings in the back of you volume control dial and turn the knob all the way up and down several times and then blow low compressed air threw the same small openings while rotating your dial.That should fix your problem.Be sure you unplug your receiver before performing this procedure.
Posted on Feb 20, 2009
Hi there.Alot of times these old amps on there power board will have dust build up on them.Try this,Fully blow the amps on/off button and every other place you can get at..I hope this may work for you.
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Posted on Mar 31, 2009
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