[time-nuts] Symmetricom S200 PSU

Scott McGrath scmcgrath at gmail.com
Sun Oct 1 19:27:54 EDT 2017

Check to see if PSU is a symmetricom power supply it MAY be a standard merchant power supply for which replacements are available from newark/digi-key/arrow/ebay etc

Content by Scott
Typos by Siri

On Sep 18, 2017, at 3:21 PM, Clint Jay <cjaysharp at gmail.com> wrote:

Hi Chris, if it's not blowing fuses and you're sure you've got all the
capacitors ( low value ones in the primary specifically) then check all the
high value resistors on the primary and continuity from reservoir capacitor
to switching transistor.

The average SMPSU usually doesn't deviate wildly from the application notes
of the switching controller so if there's no specific schematic that might
be a lifeline.

On 18 Sep 2017 20:08, "Lists via time-nuts" <time-nuts at febo.com> wrote:

Hello Fellow Time Nuts,

Does anyone know where I can get either a circuit diagram or a replacement
PSU for a symmetricon S200 NTP server?

I’ve fixed the original one twice before by replacing all the electrolytic
caps, this time it’s popped something more critical and refuses to come
back to life.

So I either need a new PSU or a circuit diagram so I can fault find on the

I’m in the UK.


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