Try googling it.. there are several sites with downloadable manuals.
On Tue, Jan 24, 2017 at 1:22 PM, John Hudswell <[log in to unmask]
> Hello All,
> This is a bit of a long shot I think but worth a try.
> I've been lent a Topcon GTS-4B total station. Unfortunately, as it's a
> relatively early model (1989) it doesn't store readings. This means that
> topographical surveys are impractical: I really don't fancy the prospect of
> writing down thousands of three-dimensional readings!
> I wonder whether anyone has a copy of the relevant Interface Manual so I
> can work out how to use a laptop to log readings via the instrument's
> serial port.
> Or even better, does anyone know of a Topcon FC-5 data collector in need
> of a good home? These were originally released in 1989 so would probably be
> buried very deeply in a store room.
> Thanks in advance for any suggestions.
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