Amp problem, can I fix it?

[filete]

Hi there!

I am about to move my studio to another place, and I found
an old power amp (Alesis R-100) that it has this problem, I wonder
if I can fix it:

The right volume knob, when you turn all the way down, it continues
to let sound out, if I turn to other position he gets a lot of variations
on the volume level.
As you can see, this makes impossible to stay on a specific volume
level exactly as the left channel.

Is this a easy thing to solve?
And can I fix it or should I get technician help?

This amp has been for several years (2-3), in the original
cardbox, but with no use.
If this problem becomes expensive to fix it, I just might give it
away and get another one!

Any help or repair link would be great!

Thanks!

 

[gecko zzed]

It is possible that this is a relatively cheap thing to repair. If I was a guessing man, I would suggest that the pot contacts are dirty or corroded, and that it is a matter of replacing the pots. If just one is playing up, my inclination would be to get both replaced.

The tricky bit could be if they are specialised parts that can't be obtained easily. For the most part, pots are dirt cheap.

 

[ocnor]

I agree it sounds like dirty pots. Get some contact cleaner and spray them really good then turn the knobs back and forth a bunch of times.

 

[earworm]

..and then mail it to me for free !

i had a symetrix 522 compressor, pretty old thing,
when i moved the ratio and treshold buttons i heard the typical cracking noise, weird thing was that whenever there was any compression going on i had this cracking sound all over my signal, not loud, but i could hear it, like a bit of distortion

i turned all the buttons around for minutes and minutes, for days and days,
and it all dissapeared ! no more noise, first i thought the thing was broke, but no, i was able to sell it for a nice price

same thing with a tiny cheap guitar amp from a friend, he thought it was totally ruined, i fixed every button in less than 15 minutes, without contact spray..

last month i bought an extreme cheap bbe sonic maximizer, i opened it up to see if there wasn't any money in it and i found alot of dust and DOG HAIR to be stuck around the pots,
after i took that away...guess what, clean..

 

[karyoker]

When you say all the way down and still get sound that indicates the mechanical stop is busted.. I have sprayed a lot of pots I recently cleaned the vol on a jbl eon . But about the second time I'll replace pots with an IRC or agood one.. They are not hard to change ....