I believe there is an internal cooling fan fitted in the KN7000. If it stops working, then obviously the internal temperature will rise. I seem to remember that I could hear a fan in my KN6000.............
I've listened very carefully to my KN7000 after it has been operating for an hour or so, but was unable to detect any fan 'noise'. However, some fans do operate with little or no obvious noise. I cannot detect any excessive temperature on the outer casing on my KN7000, even after a full evening's use.

Incidentally, Roger, Derek and Audrey are all UK based so I would expect that all their keyboards have identical specs.

Alec may be able to confirm whether or not a fan is fitted.

[This message has been edited by Bill Norrie (edited 06-07-2008).]
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Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley
( especially when the music is played on a KN7000....)