[time-nuts] Oscilloquartz OSA-4350 GPSDO

Mark Sims holrum at hotmail.com
Sun Dec 31 14:15:11 EST 2017


I disassembled the unit and found that +5V is shorted to ground on the top board.   No shorted tantalum caps or obvious failed parts.  I am beginning to think it may be power/ground planes are shorted on the four layer board (all boards are four layer)... probably wasted $20 on a DC-DC.  It's not going to be easy tracking down the short.   Maybe apply a high-current 5V supply and see what gets hot.

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> Are you going to swap out the DC-DC module?


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