Ron wrote in message
...
Greetings folks

Has anyone yet got to the bottom of the StagePass300 intermittent sound
problem which seems to be endemic with the units these days.

Sound cuts out intermittently, although the leds continue showing a
signal which returns if the unit is switched off and on again. There
doesn't seem to be a mechanical cause such as dry joints etc. as tapping
the unit makes no difference. It seems to be possibly a problem with the
protection circuits.

Ron


I've only ever seen blown channels. Beware antiphase outputs . Increase the
fan apertures while in there. Schematic as .rar probably on eservice.com ,
opens to
Yamaha-Stagepas300 pwrmix.part1
then pdf
I would drill open some of those tiny vent holes and open up the outlet side
of the "main " fan and see how it fares after that