Arfa Daily wrote:


** The schem of the 2.3 should be very close:

http://www.mediafire.com/view/bmotmj..._manual+8.jpg#



Thanks for that, Phil. Much appreciated. Odd how it works for a short while.
Before having the schematic, I gave everything in the area a good dousing
with freezer when it failed, but nothing really that I would say was very
positive. Maybe - and it *was* a maybe - the 5532 was a bit sensitive, but
it was inconclusive. I did notice that when it was wrong, the waveform on
pin 7 I think it was, was much bigger than 'normal' and the output TRs on
that side got quite hot quite quickly.


** Is there a dummy load connected ?

The clip indicator is probably just showing the channel is being overloaded, as is the rapid heating. Could there be an intermittent short in the output wiring ?

Also, I see there are two PCBS, small signal and power stuff, interconnected by some kind of multi-pin. You must know how reliable they all are...


I'll try and find time to get another look today or tomorrow with the
benefit of your schematic. Thanks again.


** I found the Alto schem on a net forum, it looked terribly familiar.

Have you not seen the QSC's USA models or the MX700 ?



... Phil