amplifier/ receiver volume knob problem?

Posted by admin in Tuesday, June 9th 2009

gnivri asked:

sometimes when i adjust the volume knob on my Yamaha amplifier, the volume either changes very slowly, not move at all, or decreases when i try to turn it up. what causes that? anyway to fix?
this has also happened to another amplifier i have used. (KLH brand). the knobs on both of them spin much looser than it used to, when they were new.
does the amplifier need to warm up? it seems the problem is gone after i turn it on for a while.

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3 Comments

mix man said in June 11th, 2009 at 8:23 am

its the bord in the amp and you can’t fix it

i am a sound engineer and teck for 4ys. i am 17

BrewMan said in June 13th, 2009 at 8:33 pm

Pull the knob off and make sure that the teeth inside the knob itself aren’t stripped off. If it’s spinning you’ll need to apply super glue on it and slip it back on.

If it isn’t the knob…

The volume control switch itself may have a short. Unplug the unit, open the crate, inspect the wires that are soldered to it. Are they all connected firmly in place? If not then you’ll need to get a soldering gun out and reattach them. This happened several times to me, as well.

If the wires are all firmly in place with no shorts then you need to take it to a repair shop.

countb47@rogers.com said in June 15th, 2009 at 5:20 pm

I have an amplifier on a stereo system that is about 10 years old. The volume control quite often made noises come from the speakers, mostly the right one, plus it was doing some of the same things your is. I took the knob off and used some electrical wire and control cleaner spray on the place where the knob shoves in. The problem was dirt on the parts of the volume control you can only see by taking off the knob. A volume control is a rheostat control, just like a dimmer switch, only in this application it controls volume, instead of the speed of a fan, or brightness of a light. The connections inside get dirty, which mixes up the signal that controls what you want the volume knob to do. So, you could try that. It might just work, for the price of a spray can of electrical connection and wire cleaner.