[time-nuts] Anyone familiar with SR-620 repair?

Brooke Clarke brooke at pacific.net
Fri Mar 23 21:59:44 UTC 2012

Hi John:

I import a Russian made ESR meter that also reads Capacitance in circuit and have used it to make a number of what would 
have been impossible repairs including my kitchen wall mounted electric oven and the Heathkit GC1000 WWVB clock.
http://www.prc68.com/P/Prod.html#ESR <- ordering info
they are in stock
http://www.prc68.com/I/ESRmicro.shtml <- tech stuff

Have Fun,

Brooke Clarke

John Ackermann N8UR wrote:
> My SRS SR-620 counter died last weekend.  After superficial troubleshooting, it looks like there's probably a short on 
> one of the power supply rails.  Symptom is that nothing lights up when power is turned on, but one or more of the 
> three terminal regulators gets very, very hot (can't tell which one since they're all bolted to the side rail as heat 
> sink).  The unit had been running continuously for several weeks when the failure occurred.
> I just learned from SRS that they charge a flat rate 25% of the current list price for repairs!  (To be fair, if 
> you're the original purchaser, it's only 20%.)  The SR620 currently lists for about $5K, so we're talking about a 
> mighty expensive shorted cap (if that's what it is)!
> Anyway, has anyone here troubleshot an SR-620 with a problem like this, or have any general insights about working on 
> one of these beasts?
> Thanks,
> John
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