Your not placing anything on top of the unit are you?
or
Placing it on top of a receiver?
A friend of mine was having similar problems with his 722. He went thru 3 units and it was a heat issue.
The first two died because he place it on top of a 500 watt receiver, all the heat from the receiver rose up and overheated the units.
His last one was because he placed the receiver on top of the 722. This time it didn't have enough circulation to cool itself.
Eventually it was solved by placing the unit alone next to his other components.
The 622's and 722's do not take heat very well at all. I went so far as to install a small computer fan on the back of mine just to give it more cooling. The cooling fan on most units only kick on when the unit hits a certain degree. Unfortunately, one of the first things to malfunction when a unit overheats is the temperature sensor.
Really bad design.
or
Placing it on top of a receiver?
A friend of mine was having similar problems with his 722. He went thru 3 units and it was a heat issue.
The first two died because he place it on top of a 500 watt receiver, all the heat from the receiver rose up and overheated the units.
His last one was because he placed the receiver on top of the 722. This time it didn't have enough circulation to cool itself.
Eventually it was solved by placing the unit alone next to his other components.
The 622's and 722's do not take heat very well at all. I went so far as to install a small computer fan on the back of mine just to give it more cooling. The cooling fan on most units only kick on when the unit hits a certain degree. Unfortunately, one of the first things to malfunction when a unit overheats is the temperature sensor.
Really bad design.