On 04/12/2011 21:19, N_Cook wrote:
This is one of my repair briefs that may well be consistent with your query
symptoms, causation would seem to be PbF or electrolytic intermittent punch
through


Well that's an actual component failure, the fault I`m on about is
intermittent and very common. It doesn't seem to be dry joint or heat
related, sometimes they come on then go off, sometimes they fail to
produce sound even tho the meters show a signal.

Switching of and on again generally restores operation. It's become a
common fault and a shame because the units are otherwise very useful for
small gigs and if not for this lack of trustworthiness would be
lucrative for hire purposes.

I imagine that the typical case of output device failure might be caused
by the unit being thrashed beyond its design limits (as so often happens)

Ron