I just bought a Luxman R 115 for what I think was a steal. However, when I adjust the volume, the right channel crackles and cuts in and out. It can always be restored to proper function by a little wiggling. Any Thoughts on how to fix this?
Eugene I had a similar problem with an Older Rotel (16 years). I took it to the shop where they essentially opened the top and then used wd40 on the volume knob (take out the knob). This helped a lot. Although once in a while I still hear the crack, it happens a lot less frequently than before.
I wouldn't use WD-40, though the diagnosis is correct. The VC's contacts have oxidized and it isn't tracking properly. Buy a spray can of Pro Gold and clean all the connections and controls. You can pick this up at Radio Shack, I believe, or just stick Pro Gold in a search engine to find a dealer. Don't overdo it on the spray. Use just enough to get rid of the noise and oxidation. Use a Q-Tip dampened with Pro Gold to clean the connectors on the back of the amp. A problem of older amplifiers is the nickel in the connections will constantly oxidize and you'll have to repeat this cleaing about once a year.
Either treatment is on the right path. So long as the cleaner willies along the shaft and into the pot, then sweep the pot clean. I might suggest a straight alcohol contact cleaner to mop up, then any other compound of your choice. As Jan said, repeat annualy(spring cleaning).