I wouldn't sink much money into this...especialy since a brand new C320BEE can be had for less than it would cost to repair your 3020.
I would just take the cover off, pop off the knobs, gently vacuum the interior and blow it out with a can of compressed air, then spray some contact cleaner into the controls while actuating them to work the cleaner into the parts. Let it sit for a day or two, clean any residual drips off of the interior with some window cleaner, plug it in and see what happens.
You really have very little to lose. If that doesn't do the trick, then you're probably looking at a costly overhaul including resistors, capacitors, etc, which probably won't be cost-effectve.
There are too many good, cheap integrated amps out there to waste too much time on an old 3020, good as it was in its day. The Cambridge Audio 340A and 540A, Rega Brio, Rotel RA-01 and NAD C320BEE will all outperform it.
Good luck...
I would just take the cover off, pop off the knobs, gently vacuum the interior and blow it out with a can of compressed air, then spray some contact cleaner into the controls while actuating them to work the cleaner into the parts. Let it sit for a day or two, clean any residual drips off of the interior with some window cleaner, plug it in and see what happens.
You really have very little to lose. If that doesn't do the trick, then you're probably looking at a costly overhaul including resistors, capacitors, etc, which probably won't be cost-effectve.
There are too many good, cheap integrated amps out there to waste too much time on an old 3020, good as it was in its day. The Cambridge Audio 340A and 540A, Rega Brio, Rotel RA-01 and NAD C320BEE will all outperform it.
Good luck...