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Harman Kardon AVR510 - At random times the volume will creep upwards. Other times it will shoot upwards. The remote works every time to turn it down, & the knob on the unit will work 50% of the time when this is happening. If anyone knows, thanks in advance

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I have worked on two h/k for no sound. The only problems I have found are bad solder joints. You have to look very close to see the cracks. Most of the are found at board conectors. The last one I worked on did not look like there were any bad solder joints, but after resoldering 100 pins on boards the unit came to life. I would start with the volume control. Their is a nut that holds the control tight to the frount face under the nob. If the control feels loose, moves side to side I would suspect your loose conection to be at the control itself. Make shure to tighten the nut on the control after you fix.

Posted on Apr 12, 2008

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