[time-nuts] Tbolt failure modes

[J. L. Trantham]

I would suspect the problem is there or 'up stream'.

If it is not being exercised, it's going to be cold.  If it's dead, it's
going to be cold.

Good luck.

Joe

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of bg at lysator.liu.se
Sent: Tuesday, May 08, 2012 5:33 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Tbolt failure modes


Hi Magnus,

> On 05/08/2012 11:58 PM, Bob Camp wrote:
>> Hi
>>
>> The first thing to check is the soldering job on the DB-9 connector. 
>> Second thing to check is the RS-232 level translator IC. (RS-232 in 
>> should create TTL etc)
>
> Does not explain why the OCXO remains stuck as if it was untrained.
>
> I suspect that the CPU never starts or hangs early.
>
> Cheers,
> Magnus

The big Trimble IC (U2) close to the RS232 port, is also noticeable colder
to a finger tip on the faulty unit, compared to a working unit.

--

  Björn


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