Hi all, New to the list, but have known of its existence for a while as I know others that have been subscribers.
My question pertains to a timebase used in a Schulmerich carillon bell tower system from the 1990’s. The Seiko Epson RTC-72421 Real Time Clock Module (4-bit) is used, but the clock ends up walking to a noticeable degree (minutes) over a period of months. Is this expected for the device in question, or could it possibly have a defect? Datasheet available here: https://support.epson.biz/td/api/doc_check.php?dl=brief_RTC-72421&lang=en <https://support.epson.biz/td/api/doc_check.php?dl=brief_RTC-72421&lang=en> From what I can tell it uses an internal oscillator, so it sounds like I would need to find a drop-in replacement or build a module that will replace it with a significantly better time standard. Any advice is appreciated as to whether could be accomplished without too much trouble. I’ve repaired a few of these systems over time and there are enough of them still in the wild that it might be worth me fabricating a module for them. Also, on the off chance someone is versed in EPROM data recovery or knows of a resource for it, I would appreciate that information as well. Regards, Corey N9WIV _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
