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

[John Ackermann N8UR]

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