Hello, was wondering if someone could advise on this problem ...

Background: My midi Amp (SU-X911) is part of a Technics system (CD player, Tuner, Cassette Deck, Equalizer). The system was bought sometime in the late 80's (yes it's old).

Problem: Amp volume (controlled by electronic dial) DANGEROUSLY ERRATIC - suddenly silent for 2-3 seconds, before jumping to almost max! Adjustment to volume control brings it back to normal volume. During the silent and max jump, the volume level display (eg. "-44dB") does not change.

Consequences: My precious speakers risk being blown up!

Remedy attempts so far: Following advice from an electrician colleague, I've pulled apart the amp, pulled out the volume control potentiometer and spray cleaned it (with electronic spray). I must say the amp was generally very very clean inside.

Success? - No, problem returned after one day of amp operation.

Other Notes: My colleague now suggests it could be the amp itself playing up (ie. not the volume pot). I listened to a whole CD (45mins) last night but it was via headphones, and did not encounter the problem - interesting to see if the problem occurs using headphones as well as the speakers themselves (the Aaron ATS-1 speakers are 8 ohms, and the amp speaker output itself is rated 8-16 ohms)

Any ideas anyone? Would greatly appreciate advice - perhaps there's one bit of the amp I need to look at / replace.



Thanks!!!