[time-nuts] Re: Question about TSC5110

[AC0XU (Jim)]

Thanks for all the suggestions. I saw the DS12887+., but wasn't sure of its compatibility. Anyway, I will try it.



At 01:22 PM 6/16/2024, Razvan Popescu wrote:
>I looked at the datasheet for the M48T86 which on Mouser is obsolete but
>the datasheet says it is pin compatible with DS12887.
>
>The DS12887 is also obsolete but they have a newer version DS12887+ and
>it costs € 12,49.
>Here is the link: https://mou.sr/4esFgeW
>
>Regards,
>Razvan
>
>On 16/06/2024 01:06, Jim Schatzman via time-nuts wrote:
>>Thanks for the suggestions!
>>
>>The RTC is an STMicroelectronics M48T86PC1 which is obsolete. They are available from various sources, but not Digikey and Mouser. I have ordered some. I just have never seem them before, so I wasn't looking for a large DIP package to contain a battery.  Live and learn.  I am interested to see if the batteries are good in the available "new" parts, since they are no longer made.
>>
>>
>>At 04:21 PM 6/15/2024, Wilko Bulte wrote:
>>>Have you tried swapping the coprocessor cards back? It could be as simple as re-seating the cards, which in essence is what happened during the swap. I think a swap-back is worth trying.
>>>
>>>As for the battery question: is there per chance a "fat"/ high DIL chip in there marked Dallas or ST (SGS/Thompson) ? Those ICs have Li batteries in their 'backpack'. Replacing a depleted battery requires swapping the entire chip. I think they are speced for 10 years or so but generally last longer (at least in equipment I saw them in).
>>>
>>>Wilko
>>>
>>>>On 15 Jun 2024, at 23:55, AC0XU (Jim) via time-nuts <time-nuts at lists.febo.com> wrote:
>>>>
>>>>I have several TSC5110s. One stopped working after a period of high temps in the lab.  It wouldn't complete the boot process - just displayed the spash screen, flashed off, then splash screen again. Power cycling gave the same result. Replacing the compact flash card didn't help.
>>>>
>>>>Swapping cards between two units one at a time, there were no changes in behavior until I swapped the co-processor card. Then both units started working!
>>>>
>>>>I am not sure what that is about. But I notice another thing - I can't change the date/time on either unit. I suspect the CMOS battery, but I can't find it. The CPU boards don't have the standard CR2032 or anything I recognize as a battery.  When I try to set the date/time, the units freeze up and have to be power-cycled.
>>>>
>>>>Anyone know how to locate the battery on these CPU boards?
>>>>
>>>>Also, any thoughts on why swapping the co-processor cards made both units start working?
>>>>
>>>>Thanks!
>>>>
>>>>Jim
>>>>_______________________________________________
>>>>time-nuts mailing list -- time-nuts at lists.febo.com
>>>>To unsubscribe send an email to time-nuts-leave at lists.febo.com
>>_______________________________________________
>>time-nuts mailing list -- time-nuts at lists.febo.com
>>To unsubscribe send an email to time-nuts-leave at lists.febo.com