Factory reset
Resetting factory settings SR5009

Como bajar la temperatura activando el modo ECO y limitando la potencia maxima:

Will not only lower power consumption by about 30% but likely to lower the unit's temp by 10 degrees as well.

When set to Auto, should be disabled as master volume approaches -20db/60. When set to ON, no noticeable change in db or audio quality up to 0db/80. I keep it set to ON all the time, although max volume for me is -10db/70 for movies.