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 have 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 have 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 indicators or readout (unit looks to be off), -DROPOUT form the PS is ok. I believe the 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 this unit to for repair. Being retired and all this just being a major hobby makes repair cost a big concern. Regards. Don J.

You might say where you are. Maybe someone lives close that can assist you. Regards, Tom ----- Original Message ----- From: "Don@True-Cal" <truecalservices@gmail.com> To: "'Time Nuts Group'" <time-nuts@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 > have > 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 > have > 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 > indicators > or readout (unit looks to be off), -DROPOUT form the PS is ok. I believe > the > 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 > this > unit to for repair. Being retired and all this just being a major hobby > makes repair cost a big concern. > > > > Regards. > > Don J. > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

> Sorry if this is a repeat but not showing up in my sent mail. Changed the > list address slightly. Email clients lie all the time. When there is a question of whether a mail to the list was distributed, it is very useful to go to the list web page (address is at the bottom of every list message), select the list archive, and see if the message is in the archive. If it is, it was distributed, whether or not you can find your copy of the sent or received message. This simple step can very often save one from needlessly re-sending a message that everyone else already received. Best regards, Charles

Hi Tom, do you have circuit diagram for the unit? 73 Alex On 8/29/2016 2:37 PM, Tom Miller wrote: > You might say where you are. Maybe someone lives close that can assist > you. > > Regards, > Tom > > ----- Original Message ----- From: "Don@True-Cal" > <truecalservices@gmail.com> > To: "'Time Nuts Group'" <time-nuts@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 have >> 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 have >> 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 >> indicators >> or readout (unit looks to be off), -DROPOUT form the PS is ok. I >> believe the >> 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 this >> unit to for repair. Being retired and all this just being a major hobby >> makes repair cost a big concern. >> >> >> >> Regards. >> >> Don J. >> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2016.0.7752 / Virus Database: 4649/12903 - Release Date: > 08/29/16

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. Regards, Don -----Original Message----- From: time-nuts [mailto:time-nuts-bounces@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@febo.com> Subject: Re: [time-nuts] SR620 Problem You might say where you are. Maybe someone lives close that can assist you. Regards, Tom ----- Original Message ----- From: "Don@True-Cal" <truecalservices@gmail.com> To: "'Time Nuts Group'" <time-nuts@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 > have > 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 > have > 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 > indicators > or readout (unit looks to be off), -DROPOUT form the PS is ok. I believe > the > 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 > this > unit to for repair. Being retired and all this just being a major hobby > makes repair cost a big concern. > > > > Regards. > > Don J. > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

how fare are you familiar with electronic equipment troubleshooting? could you find components, test points if somebody would ask you for that? do you have some electronic test equipment e.g. multimeter, oscilloscope? --last year I helped somebody to fix one HP high-frequency generator just per e-mail back and fort and he was able to fix the equipment, if you are interested let me know Regards Alex On 8/29/2016 4:41 PM, Don@True-Cal wrote: > 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. > > Regards, > Don > > -----Original Message----- > From: time-nuts [mailto:time-nuts-bounces@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@febo.com> > Subject: Re: [time-nuts] SR620 Problem > > You might say where you are. Maybe someone lives close that can assist you. > > Regards, > Tom > > ----- Original Message ----- > From: "Don@True-Cal" <truecalservices@gmail.com> > To: "'Time Nuts Group'" <time-nuts@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 >> have >> 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 >> have >> 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 >> indicators >> or readout (unit looks to be off), -DROPOUT form the PS is ok. I believe >> the >> 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 >> this >> unit to for repair. Being retired and all this just being a major hobby >> makes repair cost a big concern. >> >> >> >> Regards. >> >> Don J. >> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2016.0.7752 / Virus Database: 4649/12903 - Release Date: 08/29/16