Meat Plow wrote:

I see. I took the OP's description of "Head Unit" to mean replacing the
head unit (unit with the heads in it that can be replaced separately.) and
not the "whole cylinder" whatever that means.


That is the upper and lower drums, spindle motor and the head
electronics. Unscrew it from the chassis, unplug the cables and change
the whole assembly.

That is how heads are changed on R-R broadcast tape machines, like
the 1" Sony machines we used at Ch. 55 in Orlando. If you were used to
it, you could drop a new $1100 head into the machine in under 15
minutes, and be back in service. It came prealigned and tested. You
didn't have to take the machine out of the rack or unhook anything else.
It was one of the things I liked about Sony Broadcast Electronics..

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