[time-nuts] Looking for Z3801 Power Supply Board

[Dan Rae]

On 5/23/2016 3:54 PM, Dave M wrote:
> Dan,
> If you haven't already found the Z3801A page at 
> http://www.realhamradio.com/GPS_Frequency_Standard.htm, you should 
> read it thoroughly (in your case, especialy the section on the power 
> supply).  there is a good pictorial that shows locations of all the 
> power supply test points. Using that pictorial, you should be able to 
> determine which power supply is causing the problem (there are several).
Dave, it's completely dead.  I do have a schematic of the board (of 
uncertain origin), but I suspect it is one of the DC/DC convertors that 
is dead.  It just puts the power supply I'm feeding it from into tick 
mode but I can't find any obvious short anywhere.  It could be a 
Tantalum inside one of the aforesaid convertors, but it's not blown any 
pico fuses.

I will continue to puzzle over it...

Dan