[time-nuts] Trimble GPSDO power suply unit.

Tom Van Baak tvb at LeapSecond.com
Thu Sep 11 09:50:48 EDT 2008

> My Trimble GPSDO just arrive but I have a problem with the POWER Supply 
> Unit.
> After connecting all wires to the Trimble plug and made a check if all 
> voltage is correct and left the PS unit to run
> on the table without load/connecting to the GPSDO, about 15min got a 
> big bang and the Power Supply Unit blow-up.
> Opening the box found Q1 transistor / BUZ78 / blown and seems to me 
> that it was a short around R1, R2 and C11
> area, namely the two resistor had short to each-other...../ factory bad 
> installation??? /
> Anybody having a circuit diagram ????? I am trying to repair.....
> Please help, I just do not want to throw the unit to the garbage can.

I'll take care of a replacement for you; contact me off-line.


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