Question about Audio Players & Recorders
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Posted on Jan 02, 2017
It sounds like your volume control is dirty. You will have to disassemble the amp enough to get access to the volume potentiometer which is soldered to the circuit board. There will be a square hole in it that you can spray some contact cleaner into the control. Use only contact cleaner as anything else could damage the control. Use a small squirt and rotate the shaft. If this doesn't solve the problem you may have to replace the control. While you have it apart, examine the solder side to make sure all the solder joints are perfect especially those on the controls. A bad solder joint can also cause the same problem. Before you take the amp apart unplug the power with the amp on and the volumes turned down. This will discharge the capacitors so it will be safe to work on. I hope this helps.
Posted on Nov 01, 2009
Testimonial: "thx alots, i did try to clean it by blasting air on it, but i just not really sure. i will give another try. thanks for your quickly response. "
A wild guess is that the soldering on the cold side of the volume control pot MAY be bad. When it vibrates and loses contact where it is soldered, the unit will go to full volume. Check soldering of ALL the pot leads into the circuit board. Look for a thin grey line around the lead part way up the menicus of the soldering.
Posted on May 12, 2011
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