[R-390] Low Audio

[Frederick Bray]

I am a new R-390A owner and am encountering a problem.

Over the weekend, I pulled the front panel so that I could align a 
couple cams and clean the pots and switches on the front panel with 
Deoxit.  I also pulled the power supply and audio deck to do basic 
chassis cleaning with a paint brush and WD-40 on a cloth.  Upon 
reassembling the radio, I found it has very low audio, with some 
distortion when I crank up the local audio gain.  However, everything 
else seems to be working normally.  I have swapped the audio deck tubes 
with known good ones, just in case, but this made no difference.  It was 
working before I started, but clearly needed to have the pots and 
switches cleaned.

Is there anything obvious I might be overlooking?

Thanks.

73,

Fred
KE6CD