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I am currently working up a RM564B ?- seems to work OK except the fan doesn’t go round.

It’s not jammed, it spins freely by hand, and ?the blades are not hitting anything (there is no guard or dust filter ).

Before I tear into it, does it only run if the instrument overheats ? ?No manual that I can find – TekWiki has it on their Wanted List.

Many thanks

Tim

Sent from Mail ( ) for Windows

It's interesting that the RM564B HAS a fan. My 564B doesn't have a fan, and a check of the 564 manual doesn't show a fan, even though it's full of hollow state heat sources. I guess I should keep in mind that rack mounted devices could not expect the open air ventilation that bench/cart mount scopes could expect. I wonder if Tek automatically added a fan to every rack mount device that had a power dissipation over some threshold.

Is your Rotron fan a 115 VAC fan? If so, It should be easy to find a replacement.

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Jim Adney
Madison, WI USA