[time-nuts] Re: FTS 1050 schematic needed

[paul swed]

Perry
I do not have schematics. But am willing to help to see if we can figure
out whats up.
I have the FTS so am familiar with that unit. Yours is newer. But maybe
some guessing can help.
On the 4050 there is a power supply and space for batteries. The 120 VAC
comes into a linear supply and is converted to 24 V.
That charges the batteries and runs the Cesium. There are branches off of
the supply for the alarms as I recall regulated to 15V.
On the 4050 the 24 V goes into the cesium module. This was the point my
unit had failed. The electrolytics in the dc boost converter had leaked and
destroyed the board. As I figured out the boost converter takes 24V to 31V.
Fixing that with an external supply and everything worked.
Not saying thats your problem but at least a concept to consider.
Especially if you never find schematics.
Regards
Paul
WB8TSL

On Fri, Aug 18, 2023 at 10:15 PM Perry Sandeen via time-nuts <
time-nuts at lists.febo.com> wrote:

> List,
> I just purchased a FTS 1050A on Ebay it was listed as used but it doesn't
> work as advertised. The power and alarm lights come on but nothing else
> functions.
> I've D/L'd the two operators manuals from
>
> If the seller and I come to an agreement I need whatever schematic and
> circuit diagram(s) that are available.
> The link on Febo.com for the schematic takes one to the company that
> purchased Symmetraicon.
> Any help appreciated.
>
> Perrier
>
>
>
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