[time-nuts] SR620 Problem
truecalservices at gmail.com
Mon Aug 29 19:41:46 EDT 2016
Sure, my original post ask for anyone in the US as I live in Springfield Missouri but I will be happy to ship anywhere in the states. I have the complete schematics for the unit. Was hoping to find someone specializing in SRS equipment or already having repair experience with the SR620.
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Tom Miller
Sent: Monday, August 29, 2016 4:37 PM
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Subject: Re: [time-nuts] SR620 Problem
You might say where you are. Maybe someone lives close that can assist you.
----- Original Message -----
From: "Don at True-Cal" <truecalservices at gmail.com>
To: "'Time Nuts Group'" <time-nuts at febo.com>
Sent: Monday, August 29, 2016 5:17 PM
Subject: [time-nuts] SR620 Problem
> Hello All,
> Sorry if this is a repeat but not showing up in my sent mail. Changed the
> list address slightly.
> I'm looking for someone that has repair experience on the SR620 TIC. I
> a failed unit that has previously worked perfectly for many years while
> running continuously on my lab bench. The failure occurred after a very
> dirty mains power failure during a storm. There was no other evidence of a
> severe lightning strike so I suspect just a major power line glitch. I
> a second unit so time to repair is not critical. I have checked and
> confirmed all of the power supplies and eliminated all of the easy fix
> scenarios already. The major symptom is absolutely no display of
> or readout (unit looks to be off), -DROPOUT form the PS is ok. I believe
> loss of LED and display is from the processor stopped U131B flop. I don't
> have sufficient confidence, let alone spare IC to delve into the processor
> chain. Is there someone in the US with this experience that I can send
> unit to for repair. Being retired and all this just being a major hobby
> makes repair cost a big concern.
> Don J.
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