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RCA 3860 Audio/video receiver. Problem is that the volume knob doesn't change the volume, and if you touch it, it either gets too, too soft, or way too loud.

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Sounds like dirty contacts on control itself. I would switch machine off from mains and spray the volume control with switch cleaner,YOU WILL NEED TO GET INSIDE THE MACHINE TO DO THIS. available from say cpc components preston. this should cure fault.
pete

Posted on Nov 08, 2010

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Sound cuts off, but if I touch the master volume contorl knob it comes on for a short time. Do I need a new knob, or something else?


Possible that there is fault in the preamp analogue/logic control. When you touch the volume control knob the static from you partially injects the circuit to work and thereby conduct to produce the volume.
The volume controller is an analogue rheostat coupled to a circuit that can be the suspect , it can even be a fault- open circuit- of the controller.
You can remove the top cover after disconnecting the power supply and check behind the volume knob for the circuit. If you are able to test this circuit , it will confirm the case.

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Speakers way too loud


You don't say how the Samsung routes out to the receiver. I assume you're using its RCA audio L and R jacks. Inability to adequately lower volume usually means you're NOT using a Line Level input, but maybe a speaker feed.

Your TV may have a setting for variable audio out, but even if you use the fixed setting you should be able to lower the playback volume to something comfortable with the receiver's volume knob. It does go down to completely OFF, right?

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