[time-nuts] Datum FTS-4040A Cesium standard
S. Nestra
pe1rks at xs4all.nl
Thu Aug 14 18:24:55 EDT 2008
Hi,
I have a problem with a FTS-4040A standard, the LED major fault stays on forever.
When I use the monitor program from Symmetricom I see that my OCXO stays
cold and I have no Cesium oven voltage. The OCXO does feel warm so this
one is warming up, I don't know if the cesium oven is warming up since I
can't feel any heat from the CBT.
I also don't see any current from the ION pump.
After opening the unit I found a burnt resistor R1 on one board, I don't
know what it's function is but I would like to know the value of this
resistor so I can replace it.
So here is my question: does anybody have any technical documentation
for this unit and is it possible for someone to lookup this resistor in
his standard so I know the value( pictures included for position).
I think I have a power supply problem.
I welcome all suggestions.
Greets,
Stijn Nestra
Link for the pictures and the list of
faults: http://82.95.123.226/fts4040a/
More information about the time-nuts
mailing list