[time-nuts] Re: Trimble Thunderbolt Error

[Chris Hastreiter]

Dennis,

Thanks for the suggestion.  I checked all the caps out and they look good.
I also bypassed the Trimble power supply and powered the main board
directly with three lab supplies with the same result.  Let me know if you
have any other ideas!

Chris

On Sun, Oct 16, 2022 at 2:59 AM Dennis C. Donah via time-nuts <
time-nuts at lists.febo.com> wrote:

> Hi, I don't know if this relates to your issues, but I suddenly was
> having problems with my Thunderbolt being intermittent.  I couldn't find
> anything wrong and started to think that the receiver outran it's
> lifetime, but by chance I saw a bulging electrolytic cap in the power
> supply.  I changed the cap, fixed the problem. Don't know, don't care,
> it works.
>
> Dennis
>
> On 10/15/2022 11:41 AM, Chris Hastreiter via time-nuts wrote:
> > Hi,
> >
> > I have a trimble thunderbolt of 2005 vintage that just started going into
> > an infinite reboot loop with the following error spitting out in tboltmon
> > on every reboot:
> >
> > Application Fatal Error:
> > FATAL ERROR ID=0x00000000; CODE=0xE0000009
> >
> > Does anyone have experience with this problem or have ideas on what to
> look
> > for?  I've checked supplies on the +12/-12/+5V from the power supply
> board
> > to the main board and everything looks good.
> >
> > The +5V is drawing about 200mA
> > +12 is ~700mA during warmup and dropping to ~180mA when warm
> > -12V is drawing ~2.5mA
> >
> > The 10MHz out is putting out a clean sine wave that is about 0.75Hz high
> > and is unaffected by the reboot cycle.
> >
> > The 1PPS output is providing a pulse whenever the unit is running and
> stops
> > providing pulses during the reboot.
> >
> > The unit is rebooting every 5 to 15 seconds.  I've attached a screenshot
> of
> > the status reported by tboltmon when the unit is up between reboots.
> Prior
> > to this happening this unit was happily locked to satellites and
> > disciplining normally.  I didn't have an antenna attached for this
> > screenshot which is why it's reporting an antenna open condition, but
> > connecting the antenna does not affect the reboot cycle.
> >
> > I appreciate any suggestions you may have.
> >
> > Thanks,
> >
> > Chris
> >
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