Hello Roger and Derek,
Now this is rather strange, both of you have KN7000s that do not get warm or hot whilst Audreys' gets so hot she can hardly touch it. As Kitkat rightly exposed, the Operating Instructions on page 202 state "this instrument has a built-in power source that heats the cabinet to some degree but that it is NOT an indication of trouble". Maybe, depending on different countries, different power sources have been installed and thus resulting different warming-up processes. Otherwise it would seem difficult to understand why certain boards get warm or hot and others not at all.

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