[time-nuts] Re: Question about TSC5110

[Glen Hoag]

The constant rebooting makes me think that the power supply is failing. Leaky/bad capacitors would be the most common culprit. 

—Glen

Sent from my iPhone

> On Jun 15, 2024, at 18:44, Adrian Godwin via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> These timekeeper devices were used in a number of HP products in the 90s,
> typically digital scopes and the 53310A MDA. A later variant has the
> battery in a removable piggyback part but those replaceable parts are also
> proprietary so replacement is still a nuisance.
> 
> A number of people have tried to find a solution and there are rebuilds
> with cion cells, hacked apart ICs with soldered on batteries, etc. Some of
> the devices are battery-backed memory, some have clock/calendar chips etc.
> and the replacement PCB option doesn't cover all the variants.
> 
> https://www.tindie.com/products/glitchwrks/gw-1386-1-8k-replacement-for-dallas-ds1386-module/
> https://www.tindie.com/products/glitchwrks/gw-48t08-1-repair-board-module/
> https://www.youtube.com/watch?v=svPNxILeQEw
> https://www.youtube.com/watch?v=kZJDlNoJk7M
> https://www.youtube.com/watch?v=DxjjtMWErw8
> 
> 
> 
> 
>> On Sun, Jun 16, 2024 at 12:13 AM Jim Schatzman via time-nuts <
>> time-nuts at lists.febo.com> 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 The RTC is an STMicroelectronics M48T86PC1 which is obsolete.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
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