I have 2 of them:
RX1202FX (Serial # N1000158486, Date Code 1001)
RX1202FX (Serial # S1006617486, Date Code 1012)
with EXACTLY THE SAME PROBLEM!
Reverb circuit at random time going into some sort of feedback loop and starts making fast clicking noise, Sounds like a metronome set on very high tempo. Switching presets changes sound and tempo of the noise.
Anybody had the same problem? Any Solutions?